Hair Bleach, Lightening Kits, and Peroxide Treatments — safety profile
High riskAmmonium persulfate is used in hair bleach to remove color.
What is this product?
Ammonium persulfate is used in hair bleach to remove color. It is also a Type I allergen that triggers occupational asthma in hairdressers.
What's in it
Click any compound name for its full safety profile, regulatory consensus, and exposure data.
Base ingredients
Who's most at risk
- Pregnant Women — Dermal absorption of endocrine disruptors; fetal exposure
- Children — Thinner skin, higher surface-area-to-body-weight ratio
How to use it more safely
- Perform patch test 24-48 hours before application on small skin area
- Apply only to dry hair in well-ventilated area with gloves and protective clothing
- Follow product instructions precisely regarding mixing ratios and processing time
- Use on hair only; avoid contact with scalp, eyes, and skin
Red flags — when to walk away
- Contains known carcinogen — Iron — classified by IARC or NTP as carcinogenic or probably carcinogenic to humans
- Overall risk level: high — Multiple hazard pathways identified for this product category
Green flags — what to look for
- EWG Verified or similar third-party certification — Independently verified for ingredient safety
Safer alternatives
- Semi-permanent hair dyes — Lower peroxide concentration with less scalp damage risk
- Professional salon bleaching — Applied by trained technicians with proper safety protocols and monitoring
- Highlights or partial lightening — Lightens only sections, reducing overall chemical exposure and damage
Frequently asked questions
What's in Hair Bleach, Lightening Kits, and Peroxide Treatments?
This product type can contain: Lead (Pb) from solder and brass fittings, Copper nanoparticles (nano-Cu), Iron (metallic/ionic), among others. Click any compound name above for the full safety profile.
Who should be careful with Hair Bleach, Lightening Kits, and Peroxide Treatments?
Vulnerable populations identified for this product type: pregnant women, children.
How can I use Hair Bleach, Lightening Kits, and Peroxide Treatments more safely?
Perform patch test 24-48 hours before application on small skin area; Apply only to dry hair in well-ventilated area with gloves and protective clothing; Follow product instructions precisely regarding mixing ratios and processing time
Are there safer alternatives to Hair Bleach, Lightening Kits, and Peroxide Treatments?
Yes — consider: Semi-permanent hair dyes; Professional salon bleaching; Highlights or partial lightening. See the Safer alternatives section above for details.
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Open in body View raw API dataReference data, not professional advice. Aggregates publicly available regulatory and scientific information. Why we built ALETHEIA →