Disperse Yellow 3
A yellow textile dye with a hair-dye connection — the azo dye that can cross-react with PPD
INCIDisperse Yellow 3
- Category
- Dye / Colorant
- Risk level
- medium
- Azo dye
- An azo (N=N) dye — its bonds can be split in skin to release aromatic amines, which is the root of its cross-reactivity
- The PPD link
- Can cross-react with para-phenylenediamine (PPD), the main permanent-hair-dye allergen — so one allergy can flag the other
- Two exposure routes
- Unusual among textile dyes in appearing in both synthetic fabric and some nail polishes
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Commonly found in
Possible reactions
- Clothing-pattern dermatitis from yellow/orange synthetics
- Nail or periungual dermatitis from nail polish
- Eyelid/face dermatitis from nail-polish transfer
- Cross-reactive flares with PPD and other azo dyes
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What is Disperse Yellow 3?
Disperse Yellow 3 (CI Disperse Yellow 3; CI 11855) is a synthetic monoazo disperse dye that colours synthetic fibres — polyester, nylon, acetate — in yellow and orange tones, and turns up as a colourant in some nail polishes too. As an azo dye it belongs to a different chemical family from the anthraquinone Disperse Blues (106/124), and that azo chemistry is the key to what makes it clinically interesting.
It's unusual among textile dyes in having two exposure routes — fabric and nail products — so a sensitised person can meet it from their clothes and their manicure.
Why it causes reactions
Azo dyes carry –N=N– bonds that can be split in the skin (reductive cleavage), releasing aromatic amine fragments. Those fragments form the haptens that drive Type IV delayed hypersensitivity — and crucially, some of them overlap structurally with para-phenylenediamine (PPD), the dominant permanent-hair-dye allergen. Hence the cross-reactivity:
- A person with PPD hair-dye allergy may also react to Disperse Yellow 3 in bright yellow/orange synthetics.
- A person sensitised to Disperse Yellow 3 through clothing may react to PPD hair dye.
- When either is suspected, testing both PPD and the textile dye mix is sensible.
In its nail-polish role, it behaves like other nail-cosmetic allergens: the reaction often appears away from the nails — eyelids, face, neck — from hand-to-face transfer.
Where it's found
- Yellow/gold/orange synthetic fabrics — polyester or nylon clothing in warm shades.
- Garment trims and linings in those colours.
- Some yellow/gold nail polishes (less common than the textile use).
How to spot it
- Yellow/orange synthetic clothing correlating with a clothing-pattern rash.
- Yellow nail polish correlating with nail-area or eyelid/face dermatitis.
- Patch testing with Disperse Yellow 3 (in the textile dye mix or individually), plus PPD if hair-dye allergy is in the picture.
Safer alternatives
- Natural-fibre yellows — cotton or silk in gold/yellow use lower-sensitisation dye chemistry.
- Azo-free nail polish — yellows coloured with iron oxides or azo-free pigments.
- PPD-free hair colour if you also react to PPD — you may need both this and disperse-dye-free clothing.
The bottom line
Disperse Yellow 3 is the yellow textile (and sometimes nail-polish) dye with a hair-dye twist: as an azo dye it can cross-react with PPD, so an allergy to one can signal the other. Watch for clothing-pattern rashes from bright synthetics and for eyelid/face reactions from yellow polish, choose natural fibres and azo-free polish, and let patch testing — including PPD — map out exactly what to avoid.
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