Repeated topical application of para-phenylenediamine
induces renal histopathological changes in rats.
A chemical called para-phenylenediamine
, or PPD, is added to henna to make the tattoos darker and increase their lifespan.
These are followed by the metal cobalt (6%); the preservatives quaternium 15 and formaldehyde (both 6%); para-phenylenediamine
, also known as PPD, which is used in hair dye (5%); and the fragrance mix II (5%), another mix of fragrances used in allergen testing.
Yet with black henna, a substance called para-phenylenediamine
is used, which is typically found in hair dyes but is not used in normal henna tattoos.
Systemic toxicity of para-phenylenediamine
According to TEM images in Figures 10(c) and 10(d), the coating layer was 15~25nm, but a single para-phenylenediamine
molecule is about 1 nm in length.
The reference chemicals were: isopropanol (67-63-0); salicylic acid (69-72-7); lactic acid (50-21-5); glycerol (56-81-5); 4-methoxy-acetophenone (100-06-1) chlorobenzene (108-90-7); methyl salicylate (119-36-8); sulfanilamide (63-74-1); ethylene glycol dimethacrylate (97-90-5); phenyl benzoate (93-99-2); eugenol (97-53-0); 2-mercaptobenzothiazole (149-30-4); citral (5392-40-5); isoeugenol (97-54-1); methyldibromo glutaronitrile (35691-65-7); 4-methylaminophenol sulphate (55-55-0); para-phenylenediamine
(106-50-3); 2,4-dinitrochlorobenzene (97-00-7); 4-nitrobenzylbromide (100-11-8); oxazolone (15646-46-5); cinnamyl alcohol (104-54-1).
But, unknown to Chloe, her tattoo was done with black henna, which contains a substance called para-phenylenediamine
, typically found in hair dyes.
Doctors have warned that the majority of black henna tattoos are made using a substance called para-phenylenediamine
, which is found in hair dyes.
Key statement: Rubber composition which can be used in particular for the manufacture of tires, comprising at least a diene elastomer, a reinforcing filler, a crosslinking system, between 0.2 and 10 phr of an antioxidant, such as a substituted para-phenylenediamine
, and between 0.2 and 10 phr of an acetylacetonate of an alkali metal or alkaline earth metal, chosen in particular from the group consisting of Li, Na, K, Mg, Ca and the mixtures of such metals.
Often inkings are not henna at all, but a dye called para-phenylenediamine
, which can cause blistering and burns.