Ingredient
Dichloromethane (1.3 mg/Kg — confirmed contamination)
What is Dichloromethane (1.3 mg/Kg — confirmed contamination)?
Dichloromethane, also known as methylene chloride, is a solvent primarily used in industrial applications. It is a volatile, colorless liquid with a sweet smell and is produced by the chlorination of methane.
While it is not intentionally added to products, dichloromethane can be found as a contaminant due to its widespread industrial use. Health studies have raised concerns about its potential as a neurotoxicant and a possible carcinogen, although the exposure levels in consumer products are typically low.
When you see dichloromethane on a label, it usually indicates trace contamination. Regulatory bodies have set strict exposure limits, and it is closely monitored to ensure consumer safety.
Commonly found in: Paint stripper, Aerosol propellant, Extraction solvent in laboratories, Process solvent, Hair care products as a contaminant
What to watch
- Dichloromethane is classified as a possible human carcinogen by the WHO.
- Exposure to high levels of dichloromethane can affect the central nervous system.
Dichloromethane is restricted for use in personal care products and must not exceed specified concentrations.
Research indicates potential health risks, including carcinogenicity, but findings are dependent on exposure levels.
Dichloromethane is a synthetic compound and not derived from animals, generally considered vegan.
Sources: Dichloromethane in Cosmetics
Scout's take
Consumer Reports detected Dichloromethane (methylene chloride) at 1.3 mg/Kg in this product in April 2026 testing. Dichloromethane is classified as a probable human carcinogen by IARC (Group 2A) and is linked to liver damage and central nervous system effects. The EPA banned most consumer uses of methylene chloride in 2024. While the level here is lower than some other dyes in the same test, there is no safe intentional use case for this contaminant in a scalp-applied product.
Found in 2 products
Scan any product to see every ingredient explained — and healthier swaps.
Download on theApp Store GET IT ONGoogle Play