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Related Experiment Videos

Lipstick dermatitis due to C18 aliphatic compounds.

R Hayakawa, K Matsunaga, M Suzuki

    Contact Dermatitis
    |April 1, 1987
    PubMed
    Summary

    This study identifies specific impurities in cosmetic ingredients causing lipstick-induced cheilitis. Identifying these branched C18 aliphatic compounds is crucial for preventing allergic reactions.

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    Area of Science:

    • Dermatology
    • Cosmetic Science
    • Analytical Chemistry

    Background:

    • Allergic contact dermatitis can manifest as cheilitis, often triggered by cosmetic products.
    • Previous diagnosis of lip cream dermatitis in an 18-year-old female did not identify the causative agent.
    • Recalcitrant cheilitis prompted further investigation into lipstick ingredients.

    Observation:

    • Patch testing revealed strong positive reactions to two specific lipsticks.
    • Further testing identified glyceryl diisostearate and diisostearyl malate as reactive ingredients.
    • Gas chromatography analysis detected unknown impurities within these cosmetic compounds.

    Findings:

    • Patch testing with isolated impurities from glyceryl diisostearate and diisostearyl malate elicited strong positive reactions.
    • The identified allergenic impurities shared characteristics: liquid at room temperature, branched C18 aliphatic compounds, and primary alcohols.
    • Cosmetic ingredients lacking these specific structural features did not cause a reaction.

    Implications:

    • This research highlights the role of specific chemical impurities in cosmetic-induced allergic contact cheilitis.
    • Identifying and controlling these impurities is essential for formulating safer lip care products.
    • The findings provide valuable information for dermatologists diagnosing and managing cheilitis cases related to cosmetic use.

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