What are the main components of Span S-20 coconut acid?

The main chemical component of Span S-20 coconut acid is sorbitan coconut acid ester (sorbitan cocoate), a nonionic surfactant produced by the esterification reaction of sorbitan with coconut fatty acids.

Detailed Explanation

Span S-20 coconut acid is a product obtained by esterifying sorbitol (which is dehydrated to form sorbitan) with natural coconut acid (a mixture of fatty acids obtained by hydrolyzing coconut oil). Its core chemical structure is sorbitan fatty acid ester, where hydroxyl groups in the sorbitan (anhydrosorbitol) molecule react with carboxyl groups in coconut acid molecules to form ester bonds.

Coconut acid is a mixture of fatty acids obtained by hydrolyzing coconut oil. Its fatty acid composition is dominated by lauric acid (C12 saturated fatty acid), usually accounting for 45%–50% or more, along with certain proportions of medium- and short-chain saturated fatty acids such as myristic acid (C14), caprylic acid (C8), and capric acid (C10). Therefore, this product contains a mixture of esters, primarily sorbitan monolaurate, with CAS number 1338-39-2 corresponding to sorbitan monolaurate.

It should be noted that this product is chemically highly consistent with standard Span 20 (sorbitan monolaurate), the difference being that the fatty acid source here is natural mixed coconut acid rather than pure lauric acid. As a result, the fatty acid chain distribution is broader, maintaining excellent emulsifying properties while offering better formulation flexibility and mild skin-friendly characteristics.

Technical Parameters

Application Suggestions

Based on its main component of sorbitan coconut acid ester, the core function of this product in formulations is W/O (water-in-oil) emulsification. It can be widely used in:

• Personal Care Products: As a primary emulsifier in skincare creams/lotions, sunscreens, and color cosmetics, providing good dispersion for inorganic sunscreens and pigments.
• Agrochemical Formulations: As a pesticide emulsifier to emulsify active ingredients into stable emulsions, enhancing efficacy.
• Industrial Applications: As an emulsifying lubricant component in metalworking fluids, wetting and dispersing agent in paints and inks, and multifunctional surfactant in industrial cleaners.
• Textile Industry: Used as an emulsifying component in finishing agents to impart smooth and soft feel to fabrics.

Precautions

• This product is not a hazardous chemical, non-flammable, with an oral LD50 in rats > 5 g/kg, classified as practically non-toxic, and negative in skin and eye irritation tests.
• Recommended storage temperature: 5–40°C. Avoid repeated freezing and thawing to maintain product quality. Keep container tightly sealed and protected from moisture.
• When handling, it is recommended to wear protective goggles and work clothes. Although non-irritating, direct contact should still be avoided.