The Index · Hair dye intermediate
2-Nitro-p-Phenylenediamine
2-Nitro-p-Phenylenediamine
2-Nitro-p-Phenylenediamine is an oxidative hair-dye intermediate under CIR re-review.
FunctionalFunctional ingredient, not graded for skin benefits
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2-Nitro-p-Phenylenediamine is an oxidative hair-dye intermediate under CIR re-review.
What it does
Colour intermediate in oxidative hair dyes; CIR amended review remains insufficient pending concentration and NOAEL data.
The evidence
Functional ingredient (not graded for skin benefits): CIR Final Amended Report (June 2026): insufficient data; not a ban and not a completed safety clearance. Credible chemical identity and cosmetic-use context come from CIR/SCCS/manufacturer INCI definitions and databases such as SpecialChem/PubChem[1].
How to use it
Expect this as a supporting INCI line item unless labelled as a featured active.
What it does in the formula
Functional ingredient — not graded for skin benefits
2-Nitro-p-Phenylenediamine is an oxidative hair-dye intermediate under CIR re-review.[1]
Safety & limits
Source and region, always
all — Used in cosmetics within conventional leave-on/rinse-off levels; see cited safety literature.[1] CA US EU UK
Sources · 1
Numbered as cited in the text
- [1]CIR/SCCS. CIR FAR 2-Nitro-p-Phenylenediamine 062026. Regulator (2026)regulator
Revision history
18 Sept 2026Drafted by botTheSkindex Desk