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p- phenylenediamine

/p- phen·yl·ene·di·amine/ (fen″il-ēn-di´ah-mēn) a derivative of benzene used as a dye for hair, garments, and other textiles, as a photographic developing agent, and in a variety of other processes; it is a strong allergen, causing contact dermatitis and bronchial asthma.
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The extra ingredient used to darken henna is often a coal-tar hair dye containing p-phenylenediamine (PPD), an ingredient that can cause dangerous reactions in some people.
com/research/4jtczt/global_and) has announced the addition of the "Global and Chinese P-Phenylenediamine (PPD) Industry Report 2014" report to their offering.
The darker color is appealing and lasts longer, but it could contain a coal-tar hair dye ingredient called p-phenylenediamine (PPD).
Other things to avoid include retinoids (found in anti-ageing creams and acne treatments), parabens (shampoos and conditioners) and p-Phenylenediamine (some hair colourants, hairsprays and conditioners).
The No1 suspect is the chemical p-Phenylenediamine (PPD) - also implicated in the death of Tabatha McCourt, 17, in a similar incident in Aidrie, Lanarks, last year.
Black henna often contains the chemical p-Phenylenediamine (PPD), which gives the natural reddish-brown dye a black tint, said Dr Shubhada Mandar Bichi, a specialist dermatologist and the patient's doctor at the hospital.
Puro Hair will offer products that are 100 per cent ammonia free and contain the lowest levels of p-Phenylenediamine to reduce irritation.
1] assigning to v(C=0) vibration is taken as evidence for the participation of the carbonyl group in the condensation process with the amine used ethylenediamine, diethylenetriamine, triethylenetetraamine, p-phenylenediamine, o-phenylenediamine and 3,6-dioxaoctane-1,8-diamine.
Black henna contains coal tar, scientifically known as p-Phenylenediamine (PPD) and which should not exceed 6% in hair colors," she said.
While the dyes contain a variety of ingredients, over half of which are 'sensitisers' (allergy inducing), according to the EU's Scientific Committee, most of the health problems associated with hair dye come from one niggling ingredient - P-Phenylenediamine (PPD) - an aromatic amine in almost every dye on the market.
Fath, "Effects of wax and substituted p-phenylenediamine antiozonants in rubber," Rubber Chemistry and Technology, vol.