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dye intermediates p-phenylenediamine 106-50-3 rubber antioxidant dnp
dye intermediates p-phenylenediamine 106-50-3 rubber antioxidant dnp
dye intermediates p-phenylenediamine 106-50-3 rubber antioxidant dnp
dye intermediates p-phenylenediamine 106-50-3 rubber antioxidant dnp
dye intermediates p-phenylenediamine 106-50-3 rubber antioxidant dnp
  • What is phenylenediamine used for?
  • A hair dye component, paraphenylenediamine, as a contact allergen for treatment of inflammatory diseases. ChEBI: A phenylenediamine in which the amino functions are at positions 1 and 4 of the benzene nucleus. A white to purple crystalline solid (melting point 234 F) that turns purple to black in air.
  • Is phenylenediamine photolytic?
  • Photolytic. A carbon dioxide yield of 53.7% was achieved when phenylenediamine (presumably an isomeric mixture) adsorbed on silica gel was irradiated with light (λ >290 nm) for 17 h (Freitag et al., 1985).
  • Can p-phenylenediamine be used in hair dye?
  • P-phenylenediamine, as a chemical dye, is currently permitted for use in hair dye production, but there is a clear usage limits. According to China "Hygienic Standard for Cosmetics," the content of p-phenylenediamine in hair dyes should not exceed 6%.
  • What color is p-phenylenediamine?
  • Paraphenylenediamine (PPD) is a colorless compound oxidized by hydrogen peroxide in the presence of ammonia. It is then polymerized by a coupling agent to produce a color. p-Phenylenediamines are white to slightly red crystalline solids. They have been described as gray “light brown” which may result from exposure to air.
  • Is phenylenediamine carcinogenic?
  • There is still no literatures regarding to whether phenylenediamine is carcinogenic or not; but there is literature basis regarding to that p-phenylenediamine drug is toxic organic. We can refer to Shanghai Science and technology press (November 1985) "reagent Handbook" (second edition), page 980.
  • Is p-phenylenediamine flammable?
  • Non flammable p-Phenylenediamine causes allergic reactions with skin. It is widely used in hair dyes. It eventually forms Bandrowski′s base, which is found to be the primary cause for allergy. p-Phenylenediamine exposure results in dermatitis, urticaria and anaphylaxis.
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