High purity Sodium stearate powder CAS 822-16-2 C18H35NaO2 powder best selling factory price

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Introduction of sodium stearate:

Sodium stearate is the sodium salt of stearic acid, also known as sodium octadecanoic, which is the main component of commonly used anionic surfactants and soaps. Sodium stearate is a white oily powder with a slippery feeling and fatty odor. It is readily soluble in hot water or hot alcohol. Hydrolysis makes the aqueous solution alkaline, and the alcohol solution is neutral. Produced by the interaction of octadecanoic acid and sodium hydroxide. Used in toothpaste manufacturing, also used as a water-repellent and plastic stabilizer.

Parameters of Sodium stearate:

Decontamination effect of sodium stearate

The hydrocarbon base in the sodium stearate molecule is divided into hydrophobic groups, and the carboxyl group part is hydrophilic. In soapy water, sodium stearate exists as micelles, which are spherical and composed of many molecules, with hydrophobic groups inward, bonded to each other by van der Waals forces, and hydrophilic groups outward, distributed on the surface of the micelles. When the micelles are dispersed in water, they can disperse the oil into tiny oil beads when they encounter insoluble oil. The hydrophobic groups of sodium stearate dissolve into the oil, while the hydrophilic groups stay on the surface of the oil beads so that the oil beads can be suspended in water and play a decontamination role.

Physical properties of sodium stearate

Sodium stearate is a white powder, slightly soluble in cold water, and can quickly dissolve in hot water, and very thick hot soap solution does not crystallize after cooling. Has excellent emulsification, penetration, and decontamination power and has a slippery feeling and fatty odor. Easily soluble in hot water or alcoholic water, the solution is alkaline due to hydrolysis.

Chemical properties of sodium stearate

Sodium stearate is also known as sodium octadecanoic. Chemical formula Mg(C18H35O2)2. molecular weight 591.27. white fine soft bright powder or lump. Industrial product contains a small amount of oleic acid and 7% sodium oxide, making them odorless and tasteless. Slightly soluble in water, soluble in hot ethanol solution. It decomposes into stearic acid and corresponding sodium salt when it meets strong acid. Produced by the reaction of molten stearic acid with sodium oxide or sodium stearate solution with dilute sodium sulfate solution. It is used as a smoothing agent for paints, a powder molding agent for tablets, a stabilizer for plastic products, etc.

The application of sodium stearate

The main uses of sodium stearate: are thickening agent; emulsifier; dispersant; adhesive; corrosion inhibitor

1.Detergent: used to control the foam in the rinsing process.

2. Emulsifier or dispersant: used to emulsify polymers and antioxidants, etc.

3. Corrosion inhibitor: in poly packaging films to make them have protective properties, etc.

4. Chemical products: shaving gel, transparent adhesive, etc.

5. Adhesives: used as a natural glue to re-paste paper sheets.

In addition, sodium stearate can be used as a polyvinyl chloride heat stabilizer, as well as cosmetic year flour, emollient ointment, and pharmaceutical tablet raw materials (excipients, lubricants); used in school wood powder to make it lubricated bright and transparent; paint industry as a transparent leveling agent. Metal soap stabilizer performance varies with the type of metal and acid root; the general rule is as follows: heat resistance: cadmium and zinc soap initial heat resistance is good; barium, calcium, sodium, and strontium soap long-term heat resistance is good; lead soap in the middle. Weather resistance: cadmium, zinc, lead, barium, and tin soap are better. Processability: lead and cadmium soap lubricity is good, but the acid root is also very influential on lubricity. Widely used in food, medicine, coatings, plastics, rubber, textiles, etc.

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