What is Stearic Acid?

What is Stearic Acid?

One of the most asked-about ingredients that we use in Tasmanian Gold solid lotion bars is Stearic Acid. It's a safe ingredient that is very common in skincare products, but what exactly is it and why do we include it?


What is Stearic Acid?

Stearic acid is a long-chain fatty acid. It is found in a variety of natural sources, including shea butter and coconut oil. It is a white, waxy solid and is made through the process of hydrogenation, which involves adding hydrogen to liquid vegetable oils to make them solid at room temperature. 

In terms of its origins, stearic acid has been used for centuries in the production of soap and candles. It was first isolated in 1814 by French chemist Michel Chevreul, who named it after the Greek word for tallow, "stéar."

 close up of stearic acid on a wooden spoon


There are many wonderful skin benefits that can be obtained by using products containing stearic acid.

One of its main uses is as an emollient, or a substance that helps to moisturize and soften the skin. It is often found in moisturizers, creams, and lotions for this reason. Stearic acid helps to form a barrier on the skin that locks in moisture and protects against dryness and irritation.

In addition to its moisturizing properties, stearic acid can also help to soothe and calm irritated skin, making it a useful ingredient for those with sensitive skin. It is also non-comedogenic, meaning that it will not clog pores, and has low allergenic properties, making it less likely to cause irritation or allergic reactions.

As well as all of these benefits, it adds a lovely silky texture to Tasmanian Gold lotion bars and stops the bars from being too soft or too hard - ie. just right to melt into your skin without any waxy feeling left behind.

 close up of tasmanian gold solid lotion bar on a dish on a luxurious dressing table


Stearic acid is considered to be safe for use in personal care and cosmetic products. It is an approved ingredient for use in the EU and has been granted a "safe for use" rating by the Cosmetics Ingredient Review (CIR) panel in the United States. In Australia, it is listed on the Australian Inventory of Chemical Substances (AICS) and is considered to be a low hazard ingredient. It is approved for use in cosmetic products and is not classified as a dangerous good.


Stearic acid is indeed a lovely ingredient to use in moisturising products for sensitive skin. Not only is it moisturising, soothing, and low-allergenic, but it's vegan-friendly and naturally-derived too. You'll find it in many luxurious moisturisers worldwide, and in our Tasmanian Gold solid lotion bar. We just love how it feels and you will too!

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