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p-Phenylenediamine (PPD) is an organic compound with the formula C 6 H 4 (NH 2) 2. This derivative of aniline is a white solid, but samples can darken due to air oxidation. [1] It is mainly used as a component of engineering polymers and composites like kevlar. It is also an ingredient in hair dyes and is occasionally used as a substitute for ...
Health Canada and the US FDA have advised against the use of "black henna" pigment that contains para-phenylenediamine (PPD), an ingredient in hair dyes. [76] [59] Allergic reactions to PPD include rashes, contact dermatitis, itching, blisters, open sores, scarring and other potentially harmful effects. [77] Jagua tattoos are a form of ...
Its active ingredient is alkyl dimethyl benzyl ammonium chloride (5.12% by volume); sodium nitrite and blue dye are also present. [2] Barbicide is sold as a concentrate diluted for use in a ratio of 2 ounces (57 g) of Barbicide concentrate mixed into 32 ounces (910 g) of water, [3] with each stylist having a container for treating their own tools.
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A woman with dyed pink hair. Hair coloring, or hair dyeing, is the practice of changing the color of the hair on humans' heads.The main reasons for this are cosmetic: to cover gray or white hair, to alter hair to create a specific look, to change a color to suit preference or to restore the original hair color after it has been discolored by hairdressing processes or sun bleaching.
Disperse blue dyes, especially Disperse Blue 106 and Disperse Blue 124, have a higher than usual prevalence of textile dermatitis. [3] This means that people who are allergic to the dyes may develop allergic symptoms (e.g., a rash) when they wear clothes that have been colored with these dyes.
Malassezia is a genus of fungi (specifically, a yeast). Some species of Malassezia are found on the skin of animals, including humans. Because malassezia requires fat to grow, [ 3 ] it is most common in areas with many sebaceous glands —on the scalp, [ 4 ] face, and upper part of the body.
Disperse Blue dyes, especially 106 and 124, are common causes of contact allergy. [6] Disperse Orange 1 is an azo dye. Disperse Red 9 is a red dye derived from anthraquinone. Disperse Red 11, also called C.I. 62015 and 1,4-diamino-2-methoxy anthraquinone, is another anthraquinone dye. Disperse Red 60 is also an anthraquinone dye.