- Country of manufactureMalaysia
this substance consisting of crystals of white color, water - insoluble and soluble in diethyl ether. Has appearance of powder, flakes or scales of color, white with cream shade. Flavourless stearic acid, is not toxic, is not poisonous, stable at storage. Melting temperature - 69, 6 °C, boiling temperature - 376, 1 °C. Is part of fats and oils.
Chemical formula: CH3(CH2)16COOH
Stearic acid - one of the most raspostranyonny in the nature of fatty acids. Is in the form of glycerides part of lipids, first of all triglycerides (fats) of animal origin and also vegetable oils, meets in some types of oil. Besides, it contains in plants, for example in cocoa fruits, soya beans, in palm oil. It is synthesized in organism from palmitic acid under the influence of enzymes - elongaz, in charge of lengthening of aliphatic chain of fatty acids.
The main industrial method of receiving stearic acid is its extraction from stearin - hydrolysate of fats by production of soap. Salts and stearates are called stearates.
Quality of stearic acid (stearin) is defined by the following physical and chemical indicators:
- iodine number;
- hardening temperature;
- acid number;
- saponification ratio;
- mass fraction of moisture.
Depending on these indicators stearic acid is divided on technical and cleared.
Stearic acid is widely applied in chemical, petrochemical, paper, rubber and other industries. It is applied to receiving alcohols, in technology processes of production of pastes, emulsions, monomers and stabilizers. Also it is used as component of plastic greasings. The cosmetic industry applies as component of different creams and ointments. The textile industry applies stearic acid to processing of skin. Stearic acid is used in the food industry at production of margarine, at addition of fats in dough as cream basis of pastries.
Packaging and storage of stearic acid.
Polypropylene bags weighing 25 kg are applied to packaging of stearic acid. Storage of stearic acid is carried out in original packing in the dry and covered rooms. At storage it is necessary to avoid hit of moisture and heating. The warranty period of storage of stearic acid makes 12 months from the date of production.
Transportation of stearic acid.
Stearic acid (stearin) is transported railway, automobile and water by means of transport. It is transported by the covered vehicles in standard original packing or in tight containers. When transporting it is necessary to preserve against hit of moisture and heating.