2-Nitro-p-phenylenediamine
Also known as: 2-nitro-PPD; 2-nitro-1,4-phenylenediamine
INCI name: 2-Nitro-p-Phenylenediamine
What it does
A nitro colour related to PPD that has been used in hair dyes.
Benefits
None that justify its use today; safer permitted colours exist.
Concerns & Risks
Banned as a hair-dye ingredient in the EU. It is one of the common hair-dye allergens that US researchers screened for when they found undeclared allergens, including PPD, in hair dyes sold as 'PPD-free'.
Comedogenic rating
Non-comedogenic (0)
Suitable for
Not recommended
Avoid if
Avoid any product that lists it
Typical concentration
Not permitted in hair dyes in the EU (Annex II, entry 1319). India: not verified; under Cosmetics Rules 2020 Rule 39(2) anything listed in Annex A of IS 4707 (Part 2) may not be used, but we have not seen that list.