Name: Potassium sodium tartrate E337
Other names: E337, E-337, English: E337, E-337, Sodium potassium tartrate
Group: Food additive
Type: Antioxidants, antioxidants
Effect on the body: safe
Approved in countries: Russia, Ukraine, EU

Characteristic:
Rochelle salt E337 (Sodium potassium tartrate, potassium sodium tartrate) was named in honor of its creator, French pharmacist Pierre Seignet. He discovered it in the mid-17th century. Antioxidant, has a salty, cooling taste. It is included in the registers of food additives in almost all countries of the world.
In appearance, these are crystals with a range of colors from blue to colorless. The decomposition process of the additive occurs already at a temperature of 55.6 ° C, and water of crystallization evaporates from the substance. Easily dissolves in water, has high hygroscopicity, and during dissolution in water it partially precipitates.
Rochelle salt E337 has specific electrical properties; it can carry out polarization in temperature gradations. Some derivatives of potassium sodium tartrate (its tetrahydrate) have piezoelectric properties.

Application:
Rochelle salt E337 is used as an antioxidant in food preservation and the bakery industry. Rochelle salt is added to baking mixtures as a leavening agent. The field of application of the E337 additive is not limited to the food industry. Due to its electrophysical properties, sodium potassium tartrate has been used in the production of equipment. In particular, E337 was found in the pickups of telephone handsets, microphones, gramophones, and hearing aids. In the second half of the 20th century, Rochelle salt was increasingly used in the manufacturing process of electrical equipment.
Additive E-337 is also used in the process of silvering mirrors, as a demulsifier for aqueous solutions in organic synthesis. In chemical laboratories, potassium sodium tartrate is necessary for the detection of sugars and proteins.
Rochelle salt E337 is also used in medicine, as part of various drugs, including effervescent, instant drugs, and also as a laxative. Approved for use in all countries of the world.

Effect on the human body:
Information about negative impact on the human body at the moment no. There is information that Rochelle salt E337 was widely used in medicine to treat disorders digestive system, as a laxative. Normalizes digestive processes in the body, participates in the process of removing toxins. Already long time Sodium potassium tartrate E337 is used as a morning tonic in Seydlitz homeopathic powder. The daily dose for humans has not been described.

Rochelle salt "analytical grade" (potassium-sodium tartrate, tartrate, potassium-sodium tartrate) is a tetrahydrate of sodium-potassium double salt of tartaric acid in the form of colorless or white hygroscopic crystals of the orthorhombic system. We offer to buy this product in our company.

The material is produced industrially by reacting tartaric acid with sodium and potassium carbonate salts. When producing using this method, it becomes possible to increase the size of the crystals if necessary. In laboratory practice, the reagent is synthesized by precipitation from a heated solution of potassium acid tartrate in fine-crystalline form by adding stoichiometric amounts of sodium carbonate.

Rochelle salt, which has a low price per kg, is characterized by weak alkalinity and increased hygroscopicity. It mixes well with water, but does not dissolve in ethyl alcohol. When heated to 55.6°C, the reagent begins to decompose. It has piezoelectric properties, which have led to its demand in technology: in telephone handsets, electrophone pickups, hearing aids, microphones and other similar devices.

Scope of application

Potassium sodium tartrate, the price of which in our company is favorable, is used as a demulsifier in aqueous solutions, as well as when carrying out reactions using aluminum hydride in organic synthesis processes. It also applies:

• as part of Feling liquid for the detection of sugars;
• for determination of proteins in solutions by the biuret method;
• as a reducing agent for silvering mirrors using the Heinrichson method;
• to increase the service life of cigarette paper in the manufacture of cigarettes;
• as an emulsifier in cheese making, antioxidant additive and leavening agent E337, as a component of baking powders in the food industry;
• as a gearbox in the printing industry;
• to increase the time interval before the plaster begins to harden in construction;
• as a component of Seydlitz powder in the production of laxatives, as well as the production of effervescent and instant preparations;
• to increase the saturation of the solution with anodes, create a good homogeneous surface and provide the ability to work at high concentrations as part of galvanic baths;
• when cleaning bronze with gilding, since the reagent does not react with copper oxides;
• as a plant growth stimulator in agriculture;
• as a desalting agent in the chemical industry.

This material is sold in our organization at an affordable price; you can buy it in 25 kg packaging.

Precautions

The product is non-toxic, does not burn, does not ignite and does not form explosive mixtures with air. In terms of the degree of impact on the body, it belongs to the group of substances of the third hazard class. When working with it, you must use protective equipment: plastic goggles, thick rubber gloves, an industrial respirator, special shoes and clothing. This material is sold in rubles. at AQUAHIM LLC.

Storage Features

The reagent should be stored in closed containers in dry, ventilated warehouses. Shelf life – 36 months from the date of manufacture.

Rochelle salt: where is it sold with delivery throughout the Russian Federation?

We sell chemical products at affordable prices. If you want to buy quality goods with shipping throughout Russia, we suggest that you familiarize yourself with the full price list of our online store on the main page of this site. To place an order, simply click on the green button above and enter your contact details in the field that opens. Our employee in working hours will call you back.

Potassium-sodium tartrate GOST 5845-79

KNaC 4 H 4 O 6 4H 2 O

Rochelle salt- tetrahydrate of double sodium-potassium salt of tartaric acid ( sodium potassium tartrate). Named after the French pharmacist Pierre Seignet (fr. Pierre Seignette), 1660-1719 (other sources indicate the name of the pharmacist Elie Seigner (1632-1698), as well as the years of obtaining salt - 1672 and 1675).

Chemical properties and application

Since sodium potassium tartrate is a salt of tartaric acid, several optical isomers correspond to it. Only L-(+)-tartaric acid occurs in nature

The tetrahydrate is highly soluble in water (54 g/100 g) at 15 °C, at 30 °C 1390 g/l), and the salt is hygroscopic. However, the salt as such is obviously poorly soluble, since it precipitates during the preparation reaction.

Sodium potassium tartrate is a component of Fehling's liquid, in which it is used to detect sugars. Rochelle salt is also used in silvering mirrors using the Heinrichson method. In addition, this salt is used in organic synthesis as a demulsifier in aqueous solutions, usually in reactions involving aluminum hydride. Finally, the solution for the determination of proteins by the biuret method also contains sodium potassium tartrate.

In the laboratory, this salt is obtained by precipitation in fine crystalline form from a hot solution of potassium acid tartrate by adding a stoichiometric amount of Na 2 CO 3.

General characteristics and receiving

The food additive E337 has a wide functional potential. It is used as an antioxidant, acidity regulator, stabilizer, emulsifier and complexing agent.

Some properties were first described by the French pharmacist Pierre Seignet, after whom the substance was named. This happened in the middle of the seventeenth century.

Physico-chemical properties of Rochelle salt:

• state of aggregation is solid, in the form of a powder with crystals of different sizes;
• wide range of colors. Crystals may be colorless, reddish or blue. This has virtually no effect on the functions of the substance;
• when heated to a temperature of 55.6° C, the additive begins to decompose. If you continue heating, at a temperature of 70-80° C it will melt;
• complete decomposition of E337 occurs at a temperature of 130-140° C;
• density at 20° C is ≈1.790 g/cm³;
• has specific electrical properties - spontaneous polarization in a certain temperature range;
• has high solubility in water (54 g/100 g) at a temperature of 15° C. At a temperature of 30° C, solubility is 1390 g/l. As a result of this process, part of the additive precipitates;
• the substance is hygroscopic, that is, it is able to absorb water molecules from the surrounding air;
• The taste is salty with a slight cool aftertaste.

Purpose

The range of functions of potassium sodium tartrate is one of the widest. The most common use is as an antioxidant. In this case, the food additive prevents the surface of ready-made dishes or semi-finished products from interacting with oxygen. Thanks to this, the original appearance, taste characteristics, smell and shape are preserved longer. If you do not add an antioxidant, over time the food will acquire a slightly bitter taste (due to oxidative processes), may absorb foreign odors.

In different food products, this additive performs the following functions:

• ensures safety during transportation. It does not matter what kind of products the manufacturers transport - baked goods, canned or fresh fruits, or vegetables. Thanks to E337, they are less exposed to mechanical stress. Even if the surface of apples, tomatoes or sweet peppers has been damaged, the entry of pathogenic microflora into microcracks is minimized. When exposed to oxygen, the exposed surface will be less susceptible to oxidation. Due to this, apples and bananas do not darken, even if cut into pieces;
• improves the quality of the dough at the kneading stage. Taste characteristics and appearance baking depends largely on kneading the dough. Thanks to Rochelle salt, the dough is able to increase in volume and at the same time be saturated with oxygen. If you lightly press on such a crumb, it does not stick together, but returns to its original shape. All this is due to the fact that E337 acts as a leavening agent. Another advantage of using this additive is the absence of a sour taste in the finished product. It often appears due to the fact that manufacturers use soda slaked with vinegar to increase the dough in volume. In some cases, you may not guess with the amount of baking powder, so instead of a sweet pastry you end up with something sour and salty. With potassium sodium tartrate, this scenario is excluded;
• extends the shelf life of flour and bakery products by retaining moisture inside the dough. Thanks to this ability, croissants, cakes and buns remain fresh and fragrant longer, do not become stale, but do not become moldy. As for bread, the appearance of mold inside the crumb is associated with a violation of heat treatment standards (the dough sticks together and is not baked evenly). Thanks to the E337, this is also excluded;
• ensures uniform mixing of all ingredients. Combinations of products with different textures are often added to baked goods, for example, vegetable oil and water, egg yolk and flour. Not all ingredients are able to mix evenly without outside participation. This substance has the properties of an emulsifier, therefore it reliably connects different components;
• preserves the color of products if they contain dyes. In this case, sodium potassium tartrate enhances the effect of other food additives.

Effect on the human body: benefits and harms

The food additive E337 is highly valued by manufacturers not only due to its wide functional potential, but also its beneficial properties. That is why the substance is included in the list of permitted additives in most countries of the world.

E337 is capable of removing toxic compounds from the human body. In the intestines, the substance has a mild laxative effect, thereby preventing stagnation and removing undigested food residues.

The additive has a diuretic effect. Potassium sodium tartrate can be found in some medications prescribed for edema.

Not always and not everyone can use the supplement. For people suffering from kidney failure or frequent diarrhea, it is better to avoid products that contain it. Otherwise, the situation may escalate.

People suffering from disorders of the gastrointestinal tract should be very careful with the E337 supplement. This applies to ulcers, since phosphates ( structural component E337) increase the secretion of gastric juice and increase its acidity.

Use and application

E337 is actively used in the chemical industry. This substance is used to create a silver coating for mirrors using the Heinrichson method. Potassium sodium tartrate is effective in organic synthesis as a demulsifier (separator of different media) in aqueous solutions.

Since the second half of the twentieth century, the substance has been actively used during the production of equipment. The substance could be found in telephone pickups, microphones, gramophones, and hearing aids.

During laboratory research This additive is used to detect sugars and proteins.
Rochelle salt is added to anti-edema medications, soluble vitamins (fizzy drinks), and laxatives.

You need to know the amount of food additives in food (table below).

Table - Standard content of food additive E337 in products according to SanPiN 2.3.2.1293-03 dated May 26, 2008

In wines and liquors, sodium potassium tartrate can be used alone or in combination with other food additives - E334, E335, E336. They all enhance each other's effects.

Legislation

In Russia, the additive E337 is included in the list of permitted additives. Russian legislation determines its use in food products based on SanPiN 2.3.2.1293-03 dated May 26, 2008:

• clause 3.1.18. Food products in which the use of food additives used “in accordance with TI” is regulated;
• 3.2.3. Hygienic regulations for the use of acids, bases and salts;
• clause 3.6.52. Hygienic regulations for the use of consistency stabilizers, emulsifiers, thickeners, texturizers and binding agents.

The use of the E337 additive in the food industry is regulated by GOST 33782-2016 “Food Additives. Food stabilizers. Terms and definitions".