Stearic Acid 1 kg

A Reliable Hardener Behind Candles, Cosmetic Sticks, and Industrial Blends

Stearic acid supplied in a 1 kg package is a dense fatty crystalline compound used far more broadly than many expect — from candle making and personal care manufacturing to rubber processing and plastic production. It is exactly the kind of ingredient chosen by makers who have moved past single trial batches into small-scale studio or semi-industrial production, where consistency from batch to batch really matters. This product belongs to the Acids, Salts, Alcohols, and Alkalis section, which brings together related acidic and alkaline components for various technical purposes.

The single largest global application of stearic acid is candle manufacturing. It is added to paraffin or wax bases at 5 to 15 percent of the total mass to increase hardness, reduce tackiness, and improve resistance to heat and deformation during storage. The acid is introduced into the melted wax at around 70-80 degrees Celsius, then thoroughly blended until uniform before pouring into molds. Thanks to stearic acid, candles resist softening at room temperature, release more easily from molds, and burn with a cleaner, steadier flame.

In the cosmetic industry, stearic acid functions as a thickener, emulsion stabilizer, and structuring agent for creams, lotions, deodorant sticks, and solid balms. It is added to the oil phase of an emulsion during heating to roughly 70-75 degrees, where it fully melts and blends with other fatty ingredients before combining with the water phase. Typical usage rates in formulations range from 2 to 8 percent depending on the desired firmness of the finished product. The compound gives creams a smooth texture, improves emulsion stability during storage, and contributes to forming a protective layer on the skin surface.

On the industrial side, stearic acid serves as a vulcanization activator in rubber processing, a component of stabilizer systems in PVC manufacturing, a lubricating additive in plastic molding, and a binding agent in pharmaceutical tablet production. This range of uses makes the ingredient valuable not only for cosmetic labs but also for small manufacturing shops working with polymers, rubber compounds, and technical blends.

Stearic acid pairs well with organic acids commonly used in related formulations as pH adjusters or active additives — for example with fumaric acid in blends requiring additional pH stabilization, or with succinic acid, which is frequently introduced into cosmetic formulas as an antioxidant additive. Formulations built around an amino acid component may also call for glutamic acid, which is used in moisturizing skincare blends.

Store stearic acid in a dry place at room temperature, in a tightly sealed container, away from direct heat sources and moisture, since excess humidity causes the crystalline mass to clump. When storage conditions are respected, the product retains stable technological properties for a long period, making the 1 kg package convenient for regular use in small-scale production.

Solid Lip and Cuticle Balm with Stearic Acid

Stearic acid 50 g

Shea butter 70 g

Castor oil 60 g

Beeswax 30 g

Sweet almond oil 40 g

Vitamin E 4 ml

Melt the shea butter, castor oil, and beeswax together in a water bath at around 70 degrees Celsius, then add the stearic acid and stir continuously until fully dissolved. Remove from heat, cool the mixture to about 45 degrees, blend in the sweet almond oil and vitamin E, then pour into small containers or tubes and allow to set at room temperature for several hours before use.