Ammonium Hydroxide
Aqueous ammonia / Ammonia solution
Used in oxidative hair colour to swell hair cuticle for penetration; strong odour; irritant; EU Annex III restricted; SCCS assessed; inhalation concern, ventilation required; 'ammonia-free' hair colour formulations use alternatives (MEA ethanolamine)
Function & Common Use
pH Adjuster / Cuticle Opener (hair)
pH Adjuster
Permanent hair colour hair bleach products
Synthetic
Concentration Limits
No formal limit
EU Annex III: 6% as ammonia in hair colour products; also limits by pH
Format restriction: Rinse-off
Baby restriction: Use with adequate ventilation
Frequently Asked Questions
Is Ammonium Hydroxide safe to use in skincare?
Ammonium Hydroxide has a Medium concern rating. Used in oxidative hair colour to swell hair cuticle for penetration; strong odour; irritant; EU Annex III restricted; SCCS assessed; inhalation concern, ventilation required; 'ammonia-free' hair colour formulations use alternatives (MEA ethanolamine)
Is Ammonium Hydroxide allowed in India?
Ammonium Hydroxide is currently classified as "Permitted" under Indian cosmetics regulations. The maximum permitted concentration is No formal limit.
What is Ammonium Hydroxide used for in cosmetics?
Ammonium Hydroxide functions as: pH Adjuster / Cuticle Opener (hair). It is commonly found in: Permanent hair colour hair bleach products.
Is Ammonium Hydroxide safe for babies?
Ammonium Hydroxide has baby/child restrictions: Use with adequate ventilation. Avoid using products containing this ingredient on infants unless specifically formulated and labelled for baby use.
Regulatory Status
EU Annex: Annex III
Identifiers
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