Hydrogen Peroxide
⚠ EU RestrictedIdentification
CAS Number 7722-84-1
EINECS / EC 231-765-0
CosIng Ref 34325
Chemical Name Hydrogen peroxide
Formula H2O2
Mol. Weight 34.015 g/mol
Function & Classification
Primary Function Hair Colorant
Secondary Functions ORAL CARE; OXIDISING
Origin Synthetic
EU Regulatory Status
Max Leave-on 4%
Max Rinse-off 12%
Restrictions Max 12% H₂O₂ (hair dye); Max 6% (oral hygiene including tooth bleaching); Max 4% (nail hardeners).
Conditions of Use Hair: max 12% H₂O₂. Skin (teeth, nails): max 0.1% H₂O₂. Professional hair: max 40%. Not for children under 3 years.
Mandatory Warning Do not use on children under 3 years. Avoid contact with eyes. Contains hydrogen peroxide.
Safety Profile
2 / 10
No toxicology data available yet for this ingredient.
Check SCCS opinions or CIR reports for published safety assessments.
NOAEL · Dermal Absorption % · Sensitization
Formulation Guidelines
Usage level, pH range, solubility and addition phase not yet available.
Usage Level % · Addition Phase · Solubility
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Documents