A woman's world. “Introduction to the properties of salt and sugar”

What do we have in the salt shaker and sugar bowl? Purpose of the study: to deepen knowledge about salt and sugar
Tasks:
1. Study historical information about salt and sugar.
2. Learn about the importance of salt and sugar in people's lives.
3. Find Interesting Facts about salt and sugar.
4. Study the properties of salt and sugar and find out
technology of their production.
5. Conduct experiments with table salt and sugar,
analyze the results obtained.

Objects of study:

SALT
AND
SUGAR

Hypotheses:

1. The water in the sea is salty because it contains dissolved
a lot of salt.
2. Salt water freezes worse, and if
Sprinkle salt on the ice and it will melt faster.
3. It is easier to swim in sea water because it
salty.
4. If salt and sugar dissolve in water, then
By evaporating the water, I can again get salt and sugar.

Research methods

To test my hypotheses I used
the following research methods:
1. Talked to adults.
2. Studied popular science literature.
3. I read articles on the Internet.
4. Conducted my own experiments.
Here's what I found out...

This amazing salt

Salt
(sodium chloride) is a mineral
In the human body
about 300 g salt
7-8kg of salt per year
Requirement 1015g per day (up to
25g in hot weather)
500kg for the whole
life

The role of salt in human life

1. Improves the taste of food;
2. Canning, fermentation, salting;
3. Participates in physiological processes (water-salt metabolism, transmission of nerve impulses,
muscle contraction. Included in the blood
lymph, gastric juice;
4. Used in the production of paper, glass,
soaps, fabrics.

How is salt mined?

1. Rock salt is mined in mines
2. Evaporation - from salt brines
from the mineral halite
3. Sadochnaya - from sea ​​water V
special pools
4. Self-planting - from salt lakes

In our country

3 largest deposits:
Mozyrskoye, Starobinskoye, Davydavskoye.
Reserve 22 billion tons.
There are 120 billion tons of salt in the World Ocean.
If you evaporate it all, it will cover the globe
layer 45 meters.

Sweet sand

Sugar (sucrose) is a carbohydrate found in the body
it breaks down into glucose and fructose
1. Source of energy for the body;
2. Stimulates the production of the hormone of joy.
100g per day
Harm:
Homeland India
Teeth deteriorate
Diabetes
37kg per year

How sugar is obtained from sugar beets

How sugar is obtained from sugar cane

In our country

In Belarus, sugar is obtained from sugar beets;
There are 4 sugar factories;
Skidelsky is located in the Grodno region
sugar factory;
600 thousand tons of sugar are processed per year.

I'm starting to experiment...

Choose your experience

Experience No. 4
Experience No. 1
Solubility
The effect of salt on
density of water
Experience No. 2
The effect of salt on
melting ice
Experience No. 5
Crystallization
Experience No. 3
The effect of salt on
water freezing

Experiment 1 “Solubility”

Why is the sea water salty and the tea sweet?
I will need: 3 glasses of warm water, salt, sugar
1. I added a teaspoon of salt to the first glass, and
teaspoon of sugar, left the third untouched and stirred.
Result: after some time all three glasses looked
equal amounts of salt and sugar are completely dissolved. In the first
in the second glass the water tasted salty, in the second it tasted sweet, in
the third is tasteless.
Conclusion 1: salt consists of small transparent
crystals, dissolves well in water and makes
salt water.
Conclusion 2: sugar also consists of small transparent
crystals, dissolves well in water (better
hot) and makes the water sweet.

Experiment 2 “The effect of salt on ice melting”

Why are sidewalks sprinkled with salt?
I will need: 2 glasses of water, salt and 2 ice cubes
1. Add a tablespoon of salt to one of the glasses and
stirred
2. Place an ice cube in each glass
Result: the ice in a glass of salt water has melted much
faster than in fresh water.
Conclusion: ice melts much faster in salt water
so if you sprinkle salt on ice, it will quickly
will melt the ice

Experiment 3 “The effect of salt on the freezing of water”

I will need: 2 glasses of water, salt, food
yellow dye, plastic container
eggs
1. I added a tablespoon of salt to the first glass,
food coloring and stir until completely dissolved
2. I poured fresh water into the first row of the container, and
the second - salt water with dye. Placed the container
in the freezer overnight
Result: fresh water froze, and salty water(With
dye) remained liquid.
Conclusion: salt in water makes the freezing process more difficult.
The more salt in the solution, the lower the temperature
its freezing.

Experiment 4 “The effect of salt on the density of water”

Why is it easier to swim in the sea than in a river or pool?
I will need: 2 glasses of water, 2 raw eggs, salt.
1. In the second glass I added a tablespoon of salt and
stirred until completely dissolved
2. Put eggs in both glasses
Result: in the first glass the egg sank to the bottom, and in
the second one remains to float on the surface
Conclusion: when salt is added, the density of water
increases, so it is easier to swim in the sea than in
river or pool

Experiment 5 “Crystallization”

Will I be able to get salt and sugar from the solution?
I will need: 2 glasses of hot water, salt, sugar, 2 pencils and 2
wool threads.
1. I gradually poured salt into the first glass and stirred all the time until
complete saturation of the solution.
2. I tied a thread to a pencil. I dipped it in salt (this is a seed).
3. I dipped the thread with the seed into the saline solution and placed it on the windowsill
4. I did the same with sugar. The sugar solution turned out thick.
Result: a white coating of salt appeared on the walls of the first glass, and
the thread formed a whole necklace of small salt crystals
regular cubic shape.
In the second glass, some of the sugar fell to the bottom, but the thread was all
covered with large sugar crystals.
Conclusion: when water evaporates in salt and sugar
salt and sugar crystallize in the solution.

conclusions

1.
Sugar is obtained from sugar cane and sugar
beets.
2. Salt is mined from underground, where it lies in the form
the mineral halite, as well as from sea water.
3. Salt and sugar play an important role in people's lives. This
reflected in folklore. Associated with them
There are many signs, superstitions, proverbs, riddles and fairy tales.
4. Salt and sugar have amazing properties,
This is an interesting material for experiments.

check yourself

1.Question: what are the main properties of table salt and sugar?

Answer: Table salt and sugar are crystalline solids white, odorless, soluble in water, with taste: sugar - sweet, salt - salty; table salt and sugar are excellent preservatives; in order to prepare vegetables and fruits for future use and prevent them from spoiling, we either salt them or make jam from them. Salt and sugar are complex substances in their composition. The components salt and sugar are part of the blood. Both lack and excess components salt and sugar in human blood lead to diseases. (an increased level of sugar in the blood will lead to diabetes, and its deficiency will lead to poor mental performance, a deficiency of sodium, a component of salt, will lead to hypotension - low blood pressure, and an excess will lead to hypertension, kidney disease.) In order for a person to constantly replenish the necessary the amount of sugar and salt in the body, we salt and sweeten food, we also do this to improve the taste of the food we eat.

2. Question: How to detect starch in food?

Answer: in order to detect starch in food, you need to cut the test product with a knife and drop a drop of iodine onto the cut; if after some time a blue-violet spot appears on the cut, then the product contains starch.

3. Question: what acids are found in nature?

Answer: citric, malic, oxalic, and lactic acid are of natural origin.

4. Question: why is acid rain dangerous?

Answer: Any precipitation that contains pollutants - nitrogen oxides, sulfur oxides and other acidic oxides - is called acid rain. The consequences of such a meteorological phenomenon for environment They are deplorable: they destroy plants, deprive animals of food, and pollute water bodies. Humans also suffer from acid rain; the body reacts to pollution with the appearance of a number of diseases.

Homework assignments:

Task 2.

At home, take three saucers, and pour sugar into one of them, table salt into another, and starch into the third. How to distinguish these substances?

Answer: in order to distinguish between sugar, starch and table salt, it is necessary to divide each substance into two parts, add a drop of iodine to one part of all substances, the substance in which the blue-violet spot forms is starch. The rest of the substances can be tasted, which is sweet - sugar, and which is salty - salt. In general, you cannot taste unknown substances, but in this experiment it is known for sure that the substances are harmless and can be distinguished by taste. But this is an exception to the general rule!

Next lesson

Question: remember how you can prove that there is air around us. What is the importance of air for plants, animals, and humans?

Answer: wind, especially strong wind, is clear evidence of the presence of air around us. The wind tears light leaves from trees and heavy roofs from houses. Wind is the movement of air masses.

Our breathing is also a way to detect air. While drawing air into our lungs, we can hold our breath and then noisily release the air. This is especially noticeable outside in winter when it’s freezing.

You can also inflate bicycle tires with air using a simple pump.

And blow up the balloon. And the walls of the balloon seem to be holding nothing back, but it is elastic and retains its shape.

Air is of paramount importance for all life on Earth - we breathe it, that’s why we can live. Strictly speaking, we do not breathe air, but oxygen, which is part of the air.

Synopsis of direct educational activities"Cognition"

"Similarities and differences of sand, sugar and salt"

Target : introduce children to the similarities and differences of sand, sugar, salt through research activities using experiments.

Tasks:

1. "Cognition"

To promote children's cognitive and research activities through elementary research: the ability to conduct experiments.

2. "Communication"

Develop communication skills, express your assumptions, demonstrate results through actions and words.

3. "Socialization"

Exercise in self-analysis and emotional response by children at all stages of the lesson, consolidate positive emotions.

4. “Physical culture”

Practice the correct execution of exercises: body turns, squats, walking.

5. “Safety/health”

Follow safety rules when working.

Type of activity: Research.

Material: magic bags (sugar, salt, sand), jars with sand, jars with water, keys, pencils, magnifying glasses, plates, cone, dark cardboard, multimedia projector, gloves, aprons.

Progress of the lesson:

A surprise moment: the teacher brings in the “Magic Bags”.

I suggest sticking your hand into the bags and feeling what is there. The children's suggestions are listened to: sugar, sand, salt.

Educator: you must create motivation for further familiarization with sand, sugar and salt.

Children express their guesses.

Educator: my motivation is “What do these items have in common and how are they different?”

Educator: Today we will explore sand, sugar and salt and get acquainted with their properties. Where do you think research is carried out?

Children: In the laboratory.

Educator: I invite you to our mini laboratory. Now, guys, let's remember safety precautions when working. (Children list: do not scatter, do not throw in the face, do not put dirty hands in your mouth, do not rub your eyes.)

Today we are going to the laboratory to examine the sand and conduct experiments. In order to conduct the research, special equipment is needed. What equipment is on your tables?

Children: Children list equipment.

Experience No. 1. Children are asked to pour sugar, salt and sand from one jar to another, and put it in a jar of sugar. Salt and sand the pencil, move the pencil in different directions.

Conclusion : sand – loose, crumbly, loose.

Experience No. 2. What are these items made of? Examine dry sand, sugar and salt with your fingers; pour them onto the plate and examine them with a magnifying glass, Conclusion: sand, sugar and salt consist of small particles that have different colors, shapes, and sizes.

Experience No. 3. Take a handful of sand, sugar, salt and stream them at one point, cones are formed. They grow in height, and at the base their area becomes wider; if you pour for a long time, drifts form. You can blow on these objects, imitating the wind, particles of sand, sugar and salt will move.

Conclusion : sand, sugar and salt can move. Correctly they can move. Let's take a rest and get moving.

Physical exercise.

It's easy fun -

Turns left - right.

We all know for a long time -

There is a wall, and there is a window.

We squat quickly and deftly.

To develop muscles,

You have to do a lot of squats.

And now walking in place,

This is also interesting.

Experience No. 4. Pour sand, sugar and salt onto the plate. Now take the key and place it on the surface of each pile. Pay attention to the depth of the mark left on the sand, sugar and salt by the object. On which pile are the prints more noticeable and distinct? Why?

Conclusion: sugar and salt are noticeably larger and denser, so there are no traces.

Experience No. 5. Place a handful of sugar, salt and sand into jars of water and mix. Watch what happens. The sand will settle, sugar and salt will dissolve.

Conclusion: sand does not change its state under the influence of water, but sugar and salt change their state.

Experiment No. 6. Make wet lumps of sand. Look at them and remember what they look like. Please note: inside the lumps there are “empty spaces” - there is air there. What if you squeeze a lump of earth in your hand? What happened to him? Why did it decrease?

Will we be able to make lumps of sugar and salt? Why?

Conclusion: when compressed, the “empty spaces” between the particles became smaller, they pressed closer to each other, the air left, and it was impossible to make lumps from sugar and salt.

Sand painting "Sand artists".Take a cardboard cone, plug the small hole at the bottom and fill the cone with sand. Now we hold the strings and swing them over the paper and draw our drawing.

Educator: Guys, today, “our hero” is sand, sugar and salt. Where can you find it, where can you apply it?(Children's answer options).

I suggest you look at the screen, which will show where and how you can apply sand.

Slide presentation.The screen shows footage of where sand is used: in construction, for making concrete, cement mortar, for making glass, when extinguishing fires, in icy conditions, for games, you can draw with sand. Sugar is used in cooking, road workers sprinkle salt on icy roads, and is also used in medicine.

Summing up.

Educator: Let's draw conclusions. What did you explore today? (Sand, sugar and salt.)

What have we learned about them today? (They consist of small particles that have different shapes, color, size.)

What properties do they have? (Loose, loose, crumbly, move, sugar and salt change their properties under the influence of water)

Where is sand used? (In construction, for making concrete, cement, for making glass, when extinguishing a fire, in icy conditions, for games, you can draw with sand). Where is sugar used? (In cooking). Where is salt used? (Salt is used in cooking, it is used to sprinkle roads when there is ice, and it is also used in medicine).

Sugar is a common product included in the daily diet. According to statistics, its consumption is constantly increasing. There are 60 kilograms per person per year. There is a lot of information about the benefits and harms of sugar. But to understand it, you need to know about the properties of sugar, its use in solid and molten form.

Historical reference

Many researchers consider mysterious India to be the birthplace of sugar. This is where the name came from, which means “grain of sand”. Even the ancient Romans appreciated sugar. The product was in great demand. Brown sugar was brought from India. Sugar cane was used to make it. The sale and purchase of the product was carried out with the help of an intermediary, which was Egypt.

People of the upper class were the first to try sugar in Russia. He came to our country in the 11-12th century. The first “sugar chamber” was opened by Tsar Peter Alekseevich in the 18th century. The raw materials for its production were then brought from abroad. And only in 1809 the product began to be made from domestic raw materials, using beets instead of cane.

Chemical properties

Sugar is the common name for sucrose, which is part of the group of carbohydrates that provide energy to the body. It belongs to the group of disaccharides. When it is exposed to its own enzyme or acid, it breaks down into glucose and fructose. Berries, fruits and vegetables are rich in sucrose. It is characterized by two states: crystalline (more stable) and amorphous. The chemical properties of sugar are:

• it is the most important disaccharide;
• if you heat it with an ammonia solution, it will not give the effect called “silver mirror”;
• if you add copper hydroxide to sucrose and heat it, the red color of copper oxide does not appear;
• If you add a few drops of sulfuric acid to a solution of sucrose and neutralize it with alkali, and then heat it with copper hydroxide, you will get a red precipitate.

What is melting?

This is the process by which it becomes liquid state. If a compound is heated, its temperature will increase and the particles will begin to move faster. As a result, the internal energy of the body increases. When the melting point of sugar and other substances coincides with their temperature when heated, the crystal lattice is destroyed. This means that the bonds between particles decrease, because of this the energy of interaction between them increases.

A substance in its molten form has a greater reserve of internal energy. A small part of the heat of fusion is spent on work associated with a change in the volume of the body, which increases by about 6% for crystalline bodies. When crystals melt, their temperature remains constant.

Physical properties

Sucrose is highly soluble in water. If its temperature rises, so does its solubility. When it gets into ethyl alcohol, it does not change its state. But it’s fast in ethanol, but not so much in methanol. The properties of sugar and salt are different. But both substances have the ability to dissolve in water.

The melting point of sugar is 160 degrees. When it decreases, sucrose decomposes. A caramel is formed, which is compound, which has a bitter taste and the melting point of sugar and other substances is important physical quantity. Typically, it is dissolved to make sweet desserts.

Composition and types of sugar

The sweet substance, which is part of the carbohydrate group, contains water in small quantities. It also contains some minerals: calcium, potassium, iron, B vitamins. Sugar is a very high-calorie product. There are 387 units in 100 grams. There are many varieties of it:

• Reed. Made from sugar cane.
• Beetroot. Beetroot is used for cooking.
• Maple. Made from the sap of the sugar maple tree, which grows in Canada.
• Grape. The raw material is condensed grape juice.
• Sorghum. To produce sugar, the sorghum cereal crop undergoes special processing.
• Palm (yagre). Palm sap is used in production.

Sugar of any name can be refined (purified of impurities) and unrefined. It is used in the daily diet, cooking, and food industry, where the melting point of sugar is of great importance. This property is used in the production of many types of products.

The effect of sucrose on the body

The sweet substance activates blood flow in the spinal cord and brain. You cannot completely give up sugar; sclerotic changes may occur. Scientists have noticed that in people who consume sugar, plaques form on the walls of blood vessels much less frequently. This means that thrombosis is less likely to occur. Those who love sweets have joints less likely to be damaged by arthritis. Sugar has a beneficial effect on the liver and spleen.

With a deficiency of sucrose, a person feels general malaise, apathy, irritability, and depression may occur. But its high content is dangerous due to the occurrence of candidiasis, periodontal disease, inflammation of the oral cavity, itching of the genital organs, and excess weight.

Nutritional value of sugar

It is quickly absorbed by the body and restores strength. However, with excessive consumption, diseases such as caries, diabetes, and obesity may appear. Therefore, there are acceptable standards for the consumption of sweet products that must be adhered to. For an adult, 80 grams per day is enough.

Sugar is an important product for the diet, since half of the energy that a person expends is made up by carbohydrates. One third of them are sugar. This is a pleasant sweet product, the physiological value of which is enormous. He excites nervous system, due to which vision and hearing are sharpened, nourishes the gray matter of the brain, forms protein-carbon compounds, glycogens, and fats.

What are salts?

They are acid residues and metal atoms involved in their formation. Salts are ionic compounds. This is the product of replacing the hydrogen atoms that make up the acid with a metal. Salts are:

• Medium, when all hydrogen atoms are replaced by a metal. These salts undergo thermal decomposition and hydrolysis. They enter into metabolic and redox reactions.
• Acidic - not all hydrogen atoms in the acid are replaced by a metal. During thermal decomposition and interaction with alkali, medium salts are formed.
• Double - replacement of hydrogen atoms is carried out by two different metals. Interact with alkaline solutions.
• Basic - when incomplete or partial replacement of hydroxyl groups with acidic residues occurs. They undergo thermal decomposition and, when interacting with acid, form medium salts.

Depending on the properties of the cations and anions that make up the substances, they are determined Chemical properties sugar and salt. Some of them decompose when heated, and when interacting with acid, they form new salts and acids. In addition, they carry out chemical reactions with bases, metals and with each other.

An obligatory companion for any tea party, confectionery masterpieces and simply the sweet life. But in order for sugar not to harm our body, we need to know a lot about it and not exceed the dosage.

For most, sugar is the familiar white sand sucrose. There are a huge number of varieties of sugars in the world. In terms of sweetness, the sweetest is fructose (fruits and honey), then sucrose (sugar cane and sugar beets), glucose (honey, fruits and vegetables), maltose (sprouted grains) and lactose ( milk sugar).

Based on their composition, sugar is divided into monosaccharides, disaccharides and polysaccharides. Monosaccharides are grape sugar (glucose), fruit sugar (fructose) and galactose. Disaccharides are milk sugar (lactose), malt sugar (maltose), beet and cane sugar (sucrose).

Like potatoes, vegetables, legumes and grains, sugar is a complete source of carbohydrates. Various types of sugar and starch are the most important carbohydrates for humans, which give energy to muscles and the body, organs and cells. The norm of carbohydrate consumption is 300-500 grams per day. Monosaccharides are quickly absorbed, passing from the intestines directly into the blood, so eating them quickly restores lost strength.

The healthy type of sugar is . By the way, it contains 80% sugar (glucose, fructose and sucrose) plus minerals and beneficial microelements (iron, potassium, calcium, copper, magnesium, sodium and phosphorus).

According to statistics, each person consumes about 40-50 kilograms of sugar per year, which is about 110 grams per day. If your diet contains few foods containing vitamin B (liver, eggs), sugar will be harmful to the body. In order to break down sugar, the human body needs vitamin B1, the symptoms of a deficiency of which are precisely a decrease in efficiency and attentiveness.

Most sugars are digested fairly quickly. But the faster your blood sugar level rises, the faster it falls. This is why the energy effect from sugary drinks or chocolate is fleeting and ultimately leads to drowsiness. If you eat regularly and in small portions in combination with sufficient amounts of complex carbohydrates, the body does not experience stress from changes in blood sugar levels.

Sugar is a high-calorie product. Our usual sugar is made from sugar beets or sugar cane. The record holder for calorie content is regular white granulated sugar and refined sugar. Brown cane sugar is slightly lower in calories, but not too much. Honey contains the least amount of calories.

Consumer properties of salt

Table salt has been used for human food for many centuries. In the old days, salt was considered wealth. Therefore, an indicator of generosity was the tradition of greeting guests with bread and salt.

Salt can be white, pink, black, iodized, extra, dietary, sea. Each type of salt has its own purpose - iodized is suitable for salads, extra for pickles, sea - excellent disease prevention.

Table salt is sodium chloride, commonly known as table salt, rock salt, or simply table salt. This product is vital for the human body.

Salt is involved in many metabolic processes and in the transmission of nerve impulses. It contains chlorine ions, which promote the production of hydrochloric acid in the stomach. Salt in general is involved in regulating the water-salt balance of the body. Lack of salt can lead to the destruction of bone and muscle tissue and nervous disorders. These include depression, nervous and mental illnesses, digestive and cardiovascular disorders, osteoporosis, and anorexia. Chronic lack of salt in the body can be fatal.

But, despite the fact that the human body cannot survive without salt, salt is contained in all natural products that are eaten, which means there is no need to add salt to them. It's a matter of taste. In this case, excess salt is absorbed by the body. And it is excreted through the kidneys with urine and sweat. Impaired kidney function can lead to swelling when excess consumption salt. Salt attracts water and retains it in the body. If the volume of fluid in the body is excessive, swelling appears, blood pressure rises, and the kidneys cannot cope. Salt should be consumed in moderation.

The most beneficial is iodized salt. But iodized salt should only be used for dishes without heat treatment. Otherwise, the iodine in the salt will evaporate and may even give the food a bitter taste.

Large sea ​​salt also no less useful. The traditional formula for table salt is sodium chlorine. Sea salt contains potassium chlorine. Potassium displaces sodium and helps lower blood pressure. It is also useful for people with diabetes mellitus because it regulates the amount of glucose in the blood.

The taste of sea salt is softer and richer than table salt. Moreover, due to the natural crystallization of sea salt, it has no expiration date. Even after 20 years, not a single mineral will be destroyed by ultraviolet radiation and oxygen. Table salt has an expiration date. Iodine is added to this salt artificially; it is destroyed over time. Edible sea salt from different seas differs in different chemical compounds, different concentrations of micro- and macroelements.

Sea salt is divided into grades. The most valuable variety is gray sea salt. It is gray from inclusions of oceanic clay with particles of the microscopic algae dunaliella. This is incredible medicinal plant has antioxidant properties.

How to choose quality sugar and salt

Salt and sugar should be dry and crumbly in appearance. If you find a large lump in a bag of sugar, it means moisture has got into it. It's better not to take this kind of sugar. Improper storage of bulk products can lead to the formation of mold.

To distinguish fake brown sugar, which is actually made from cane and is rich in vitamins, dilute a small amount of it in water and add a drop of iodine. The liquid will turn blue - the sugar is high quality.

Sugar produced in Russia according to the standards of the sugar industry must contain the mark GOST 21-94 - granulated sugar, GOST 22-94 - refined sugar, GOST R 52305-2005 - raw sugar. Most of the salt on Russian shelves is domestically produced; its reserves in Russia are the largest in the world. It is called “edible salt” and is made according to GOST R 51574-2000. If these standards are indicated on the packaging, then they guarantee a quality product.

When buying salt, read on the packaging how it was obtained: this affects the amount of harmful sodium chloride and the presence in the composition useful minerals. The type of salt will also indicate this: extra, highest, first or second. This is an indicator of the degree of purification and grinding of salt. From a health point of view: the lower the grade and the closer the composition of the salt is to natural, the more beneficial it is. It is no coincidence that sea salt is considered the most beneficial.

There is always salt on the packaging there must be an indication of:

• The product's name.
• Production method: evaporation, stone, cage or self-planting.
• Salt grade: extra, highest, first or second.
• Grind number or size of salt crystals.
• Fortification information: potassium iodate or iodide, iodine concentration, and for dietary salt: information on potassium and magnesium compounds.
• Information about additives: anti-caking, stabilizing, etc.
• Recommendations for consumption: no more than 5-6 g per day.
• Manufacturer's name and legal address
• Shelf life.

The same information should be present on the sugar packaging, with the exception of the grind number and grade.

Sugar and salt must be stored in glass and hermetically sealed containers. And iodized salt should be stored in a dark place.