The ingredient, explained

Ammonia

A published expert safety assessment covers this exact ingredient.

BufferingMasking

Explore connections

Ingredient guide

What it is and what it does

Ammonia, anhydrous

About this ingredient: EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗

Buffering: Helps resist changes in a formula's pH.
Masking: Reduces or conceals the formula's underlying odour or taste.

Function definitions: European Commission ingredient function definitions (SCCNFP/0299/00, pages 16 to 20) ↗

Registry functions describe possible formulation roles, not results for a finished product. A dictionary entry is not an approval or a safety assessment.

A closer look

What the research shows

Safety assessment

Panel found the ingredients safe in hair dyes and colors, and under described cosmetic use when formulated to be nonirritating; contact with skin should be minimized.

What this does not tell us

Institutional final expert report, not human benefit trial. Group read-across includes ammonium-ion and related-salt information. Conditional safety conclusion does not establish universal tolerance or efficacy.

Sources for this summary. Published source ↗

Research review checked Oct 1, 2026

Bounded review of local candidates, exact-name indexed primary journal/PubMed safety and topical searches; not a systematic review.