Formulation Modification, Ingredient Substitution, Preservatives, and Sunscreen Silicones
Asked by: chccake
On: August 01, 2016
Product Type:
Cosmetics
Question
I would like to modify a formula as follows:
- Water
- PEG-90
- Cetearyl Alcohol
- Sodium Cocoyl Isethionate
- Sodium Lauroyl Glutamate
- Phenoxyethanol SA
- Disodium EDTA
- Citric Acid
- Is this formula feasible?
- Can MOIST24 be used instead of Cetearyl Alcohol?
- Can Phenoxyethanol SA be used alone as a preservative? Or does it need to be used with Methylparaben, Propylparaben, Butylparaben? Is Phenoxyethanol SA milder than these three?
- Are there any Silicones used in waterproof sunscreen that are easy to wash off and less likely to clog pores?
Answer
Based on the staff's response, here is the analysis of your proposed formula and answers to your questions:
- Proposed Formula Feasibility: The staff confirms that your proposed modified formula is feasible. They suggest replacing PEG-90 with Propylene Glycol (Product ID 138).
- MOIST24 (Product ID 1053) vs. Cetearyl Alcohol (Product ID 480): These ingredients have different functions. Cetearyl Alcohol helps create the cream texture of the product, so MOIST24 cannot directly replace it if you want to maintain the texture.
- Phenoxyethanol SA (Product ID 928) as a Preservative: The staff states that using Phenoxyethanol SA alone is sufficient for preservation. They did not compare its mildness to Methylparaben, Propylparaben, and Butylparaben, but confirmed it can be used by itself.
- Silicones in Sunscreen: According to the staff, silicones used to disperse sunscreen in waterproof formulas generally have similar film-forming and water-resistant properties. Proper cleansing is important to prevent clogged pores.
Related Products Mentioned
Propylene Glycol (USP)
Cosmetics
Citric Acid (Monohydrate, Natural)
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Disodium EDTA
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Cetearyl Alcohol (50/50, e.q. Lanette O)
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Phenoxyethanol SA (eq. Optiphen Plus)
Cosmetics
MOIST24
Cosmetics