Ingredient
Potassium Sorbate + Sodium Benzoate + Caprylhydroxamic Acid
What is Potassium Sorbate + Sodium Benzoate + Caprylhydroxamic Acid?
Potassium Sorbate, Sodium Benzoate, and Caprylhydroxamic Acid are commonly used preservatives in personal care products. Potassium Sorbate is a potassium salt of sorbic acid, typically made from the reaction of sorbic acid with potassium hydroxide. Sodium Benzoate is the sodium salt of benzoic acid, produced by neutralizing benzoic acid with sodium hydroxide. Caprylhydroxamic Acid is a naturally derived chelating agent that is effective in preventing microbial growth.
These ingredients are used together in formulas for their synergistic effect in preventing spoilage and extending shelf life by inhibiting the growth of mold, yeast, and bacteria. The combination is particularly effective in cosmetics and hair care products. The safety of these substances is generally supported by regulatory bodies, though some concerns about benzoates and hypersensitivity exist.
When present on a label, it is an indication of the product’s capability to resist microbial contamination, which can be a plus for longer-lasting products.
Commonly found in: Hair Care Products, Conditioners, Shampoos, Cosmetics
What to watch
- Sodium Benzoate can form benzene, a potential carcinogen, under certain conditions.
- Some individuals may experience allergic reactions or sensitivities to Sodium Benzoate.
Benefits
- Prevents microbial growth, enhancing the product's safety and shelf life.
Potassium Sorbate and Sodium Benzoate are approved for use as preservatives in food and cosmetics by the FDA, deeming them generally recognized as safe (GRAS).
Research supports the effectiveness of these preservatives in preventing spoilage, but some studies raise concerns about potential sensitivities and benzene formation with Sodium Benzoate.
All three ingredients are synthetic or plant-derived and generally suitable for vegans.
Sources: Code of Federal Regulations Title 21 · Safety Assessment of Sodium Benzoate and Benzoic Acid as Used in Cosmetics
Scout's take
Food-grade + coconut-derived preservative trio; among the cleanest commercial preservatives. EWG 1-3.
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