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Stearic Acid

Stearic Acid is a saturated long-chain fatty acid with an 18-carbon backbone. It is another name for octadecanoic acid. Stearic acid is found in various animal and plant fats. Stearic acid is a white solid with a mild odour, floats on water. Commercial stearic acid is a mixture of approximately equal amounts of stearic and palmitic acids and small amounts of oleic acid. The pure acid undergoes chemical reactions typical of carboxylic acids. It is a colourless, waxy solid that is almost insoluble in water. In purified form it presents as shiny white flakes or powder.

Palm derivatives Stearic Acid which are used in PVC, cosmetics, rubber, textiles, and candle manufacturing industries melting point of 69.6 ° C and is a major component of animal and vegetable fats.

General Property of Stearic Acid

Parameters Characterises
Shape Pure product is white, slightly shiny, waxy crystals
Melting point 71.5 – 72 ° C
Boiling point 232 ° C
Flash point 220.6 ℃
Auto-ignition point 444.3 ° C
Stability Decomposition at ~ 360 ° C
Toxicity Non-toxic
Soluble Insoluble in water, slightly soluble in cold ethanol. Soluble in acetone.


Application of Stearic Acid

Stearic acid in the plastics industry is widely used in the manufacture of PVC plastic pipes, sheets, profiles and films. It is a PVC heat stabilizer with good lubricity and good light and heat stability.

In plastic PVC pipes, stearic acid help prevent “scorching” during processing. Adding it is an effective thermal stabilizer in the processing of PVC films, and it can prevent the violent exposure to sulfide discoloration of the finished film.

Stearic acid is mainly used in the production of stearates: sodium stearate, magnesium stearate, calcium stearate, lead stearate, aluminium stearate, cadmium stearate, iron stearate, stearic acid Potassium, widely used in cosmetics, plastic cold-resistant plasticizers, mold release agents, stabilizers, surfactants, rubber vulcanization accelerators, waterproofing agents, polishing agents, metal soaps, metal mineral flotation agents, softeners, pharmaceuticals and other organic chemicals.

In plastic PVC pipe, stearic acid helps to prevent “coking” during processing.

In the rubber industry, stearic acid plays a vital role in the synthesis and processing of rubber. Stearic acid is an active vulcanization agent widely used in natural rubber, synthetic rubber and latex, and can also be used as a plasticizer and a softener. Stearic acid is used as an emulsifier in the production of synthetic rubber. Stearic acid can be used as a foaming agent in the manufacture of foam rubber, and stearic acid can also be used as a release agent for rubber products.

In the cosmetics industry, stearic acid is used in emulsification in creams and cold creams to make it a stable whitening cream. Stearic acid soap esters are more widely used in the cosmetic industry.

Manufactures of stearic acid in India

Godrej Industries Ltd 3F Industries
Adani Wilmer Ltd TGV SRAAC Group
Ruchi Soya Sheel Chand Agroils Pvt Ltd
Josil Limited VVF (India) Limited
Fine Organics Industries Pvt. Ltd Pioneer Agro Extracts Ltd
Ritesh International Limited

Distribution and Buying Patterns of Stearic Acid
Most of manufactures have appointed their dealership across India, however few of them offers directly to customers on case-to-case basis. As the consumption in PVC Pipe & Fitting industry is limited, there is no credit facility given by manufactures, hence trader/ wholesaler has to buy against payment. In eastern India, there is only one manufactures, but known for producing less C18% of Stearic Acid. Hence, we source from manufactures who have built reputation over times across not only in India but globally.

How to choose Stearic Acid for PVC Pipe & Fittings / Plastic Industries
Knowing C18 is the most critical data before you buy stearic acid for plastic industries. In India, almost all manufactures do not disclose the C18 in their technical data sheet. Percentage of C18 is kept hide to mislead the buyers, We at SNG Microns Pvt Ltd discussed the C18% (Stearic Acid percentage) with our customers. When you get the quote which is lower than other suppliers, be assured that the quality of product will not be good as C18% would be less in that. Not only this, even many of suppliers offers rubber grade stearic acid to PVC Pipe manufactures and charges the price of plastic grade stearic acid, this not only decrease the performance of machine but also decrease the life of machine and finished products.

Why to buy from SNG Microns Private Limited
At SNG Microns Pvt Ltd, we discussed with customers and understand their requirements before quoting the price of specific grade. Our customers are loyal towards us as we have built trust with them overtime on quality of products. We proudly say that we have zero complaints on our product portfolio.


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