Paraphenylenediamine (PPD)
Hair dye & salon treatments
Allergy cautionCommon hair-dye allergen — stop use if swelling or breathing difficulty starts.
Main concern: Sensitisation can cause rash, swelling or severe breathing difficulty.
Do now: Check label for PPD names; stop suspected product and seek urgent help for facial swelling or breathing trouble.
Five-second scan summary
ExplainWhat the substance is
An oxidative hair-dye chemical that develops colour inside the hair shaft. It is also associated with allergic reactions when used in black henna or when people become sensitised after repeated exposure.
PPD hair dye aur black henna mein common allergen hai. Agar pehle reaction ho chuki ho to dobara use se bachain. Burning, swelling ya saans ki takleef par foran doctor se raabta karein — ghar par patch test ko proof of safety na samjhein.
LabelsLabel par naam check karein
WhereWhere it may be found
Not every product in these categories contains this substance. These are common contexts where exposure has been documented or reported.
Common product categories
- Permanent hair dye
- Salon colour
- Black henna
- Beard and brow dye
Typical exposure contexts
- Box dyes listing p-phenylenediamine on the label
- Salon mixing bowls for permanent colour
- Street or event black henna
- Dark beard dyes
Main exposure route: Scalp and hairline skin contact; salon inhalation exposure where ventilation is poor
Why it appears in products
- Primary dye intermediate in permanent hair colour
- Added illegally to some black henna pastes for darker stain
If usedAgar use kar chuke hain
- Stop the hair dye, henna or beard tint you suspect immediately.
- Rinse the scalp and hairline gently with lukewarm water.
- Keep the box, shade name and salon product list if available.
- Seek urgent care if breathing is difficult, lips swell or rash spreads quickly.
Keep the product, batch code and seller details in a sealed bag for reporting if needed.
Urgent
Seek urgent medical help if you notice
- Breathing difficulty
- Wheezing
- Facial or eyelid swelling
- Spreading blistering rash
OuterDerm does not diagnose reactions or prescribe treatment. Use professional care when symptoms concern you.
Report a suspected productSalon workers
Repeated exposure in salons
- Hair colourists with repeated PPD exposure should use gloves, avoid skin contact and ensure ventilation.
RiskWhen it becomes risky
- Previous hair-dye reaction
- Black henna at weddings or festivals
- Leaving dye on longer than instructed
- Salon worker frequent exposure without gloves
HealthHealth effects by evidence strength
strong evidence
- Allergic contact dermatitis
NHS lists hair dyes among common causes of allergic contact dermatitis; reactions can include itching, redness, swelling and blistering.
Contact dermatitis
moderate evidence
- Acute allergic reactions (severe cases)
FDA notes hair dyes can cause serious allergic reactions in some people; stop use and seek medical care if symptoms are severe.
Hair dyes and hair relaxers
Medical
Symptoms requiring medical advice
- Eyelid swelling after hair dye
- Wheezing or breathing difficulty
- Blistering rash spreading beyond hairline
- Dizziness or feeling faint during application
PopulationsPregnancy, children & workers
- Workers & salon exposure
Hair colourists with repeated PPD exposure should use gloves, avoid skin contact and ensure ventilation.
Hair dyes and hair relaxers - Sensitive skin
People with eczema or prior cosmetic allergies should discuss patch testing with a dermatologist before new dye products — home patch tests are not a reliable safety guarantee.
Contact dermatitis
RegulatoryStatus by jurisdiction
| Jurisdiction | Status | As of | Sources |
|---|---|---|---|
| United States (FDA context) | Hair dyes are cosmetics subject to FDA safety reporting; consumers should follow label instructions and stop if irritation occurs. | 2026-08-17 | Hair dyes and hair relaxers |
ProductsVerified product findings
- Street Vendor — Black Henna Cone
FDA warns some "black henna" temporary tattoos contain hair dye including PPD and can cause severe skin reactions — common at weddings and festivals in Pakistan.
United States (FDA context)
Last checked 2026-08-17
- L'Oréal — L'Oréal Excellence Creme
Permanent oxidative hair dyes may declare p-phenylenediamine on the label — check the individual pack ingredient list and do a patch test per instructions.
Last checked 2026-08-17
ReportsSuspected or unverified reports
These entries are not verified lab or regulator findings. They are kept separate so they are not read as proof against a whole product line.
- Garnier — Garnier Color Naturals
Box hair dye category — PPD may be present in permanent shades; read the pack ingredient list.
AlternativesSafer alternatives
- Discuss PPD-free or alternative colours with a dermatologistprofessional care
If you need colour but reacted before, a clinician can guide safer options — not all "natural" labels are PPD-free.
- Salon safety questions before colourroutine
Ask about ventilation, glove use and whether black henna contains PPD before festival or wedding applications.
UnderstandHair dye aur henna reaction context
RecoverReaction ke baad skin barrier guidance
Choose differentlySalon aur sensitive-scalp safer choices
ReviewSources & update history
Author: OuterDerm editorial team
Reviewer: OuterDerm fact-check desk
Last reviewed: 17 Aug 2026
- Contact dermatitis — NHS · Accessed 2026-08-17 · United Kingdom
Supports: Hair dyes and other cosmetics can trigger allergic contact dermatitis; PPD is a documented cause in hair-dye allergy.
- Hair dyes and hair relaxers — U.S. Food and Drug Administration · Accessed 2026-08-17 · United States
Supports: Hair dyes can cause allergic reactions; consumers should follow label instructions and stop use if irritation occurs.
- Temporary tattoos may put you at risk (black henna) — U.S. Food and Drug Administration · Accessed 2026-08-17 · United States
Supports: FDA warns some "black henna" temporary tattoos contain hair dye including PPD and can cause serious skin reactions.