Specimen No. 0042
CautionDerivedpreservativechelator
Citric Acid (High Concentration)
citric acid · 2-hydroxypropane-1,2,3-tricarboxylic acid · e330
Naturally derived acid used to adjust pH and act as a mild preservative. Safe at typical cosmetic concentrations, but can cause irritation and enamel erosion at high concentrations.
high confidence
Researched April 18, 2026Specimen 0042Citric Acid (High Concentration)
Concerns
- Dental enamel erosion with oral products at high concentrations
- Skin irritation and sensitization at concentrations above ~5%
- Used at low levels in most products — concentration matters greatly
Documented benefits
✓ naturally-sourced
Commonly found in
TonerVitamin C serumExfoliantToothpasteCleaning products
Sources & references
Last researched: April 18, 2026
Research disclaimer: This rating is based on available peer-reviewed research and regulatory assessments at the time of publication. It is not medical advice. Consult a qualified professional for personal health or skin concerns.
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