US EPA

4864275 

Journal Article 

Comedogenicity and irritancy of commonly used ingredients in skin care products 

Fulton, JE 

1989 

0 

Journal of the Society of Cosmetic Chemists
ISSN: 0037-9832 

40 

6 

321-333 

English 

WOS:A1989DM89000002 

https://insolitbeauty.com/documentacion/Comedogenicidad%20e%20irritacion%20de%20los%20ingredientes%20de%20uso%20comun%20en%20productos%20para%20el%20cuidado%20de%20la%20piel.pdf
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A survey, using the rabbit ear, of the comedogenicity and irritancy of several groups of skin care products indicates that many contain follicular and surface pithelial irritating ingredients. These ingredients fall into several chemical classes. Certain generalizations can be deduced by examining the results: (1) medium-chain-length fatty acids are more potent than short- or long-chain fatty acids in producing follicular keratosis, (2) the comedogenicity and irritancy of an organic material can be reduced by combining the molecule with a polar sugar or a heavy metal, (3) increasing the degree of ethoxylation in a molecule tends to reduce the comedogenicity and irritancy of the chemical, and (4) the longer chain lipids, i.e., waxes, appear too large to produce a reaction. By following the guidelines developed in this study, it is possible to formulate nonirritating, noncomedogenic moisturizers, sunscreens, hair pomades, cosmetics, and conditioners.