p-Phenylenediamine - Wikipedia
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 ...
Ingredient Watch List: Phenylenediamine, the Hair Dye …
2012年5月9日 · Have you had your hair colored lately? If so, you were probably exposed to phenylenediamine (PPD), a chemical widely used in most hair dyes, even those that claim to be natural. It’s a popular ingredient because it helps new color to look natural, and to withstand numerous washings without fading.
P-Phenylenediamine - Safe Cosmetics
WHAT IS P-PHENYLENEDIAMINE? Consumers are primarily exposed to p-phenylenediamine (PPD) through its use in permanent hair dyes that rely on chemical reactions (called oxidation) to fix the color, where it is found in concentrations of about 4 percent. PPD reacts with hydrogen peroxide to bind the color to the hair permanently.
Phenylenediamine - Wikipedia
Look up phenylenediamine in Wiktionary, the free dictionary. Phenylenediamine may refer to: o -phenylenediamine or OPD, a chemical compound C 6 H 4 (NH 2) 2. m -phenylenediamine or MPD, a chemical compound C 6 H 4 (NH 2) 2. p -phenylenediamine or PPD, a chemical compound C 6 H 4 (NH 2) 2. N,N -dimethyl- p -phenylenediamine or DMPD.
Phenylenediamines: Common isomers, synthesis, applications and …
Phenylenediamines are made from aniline and has a chemical formula C6H4 (NH2). It is found in all black dyes, including those used for permanent hair colors, leather, printer's ink, fax machine ink, and lithography.
p-Phenylenediamine | C6H4(NH2)2 | CID 7814 - PubChem
p-Phenylenediamine is primarily used as a dye intermediate and as a dye. Acute (short-term) exposure to high levels of p-phenylenediamine may cause severe dermatitis, eye irritation and tearing, asthma, gastritis, renal failure, vertigo, tremors, convulsions, and coma in humans.
Phenylenediamine - an overview | ScienceDirect Topics
Para-phenylenediamine. Para-phenylenediamine (PPD), the 2006 contact allergen of the year, is an aromatic amine that is a highly potent sensitizer and common cause of ACD.
P-Phenylenediamine Hair Dye Allergy and Its Clinical Characteristics
P-phenylenediamine (PPD) has been identified as the most frequent contact sensitizer of hair dye and the clinical characteristics of hair dye contact allergy (HDCA) are diverse. The purpose of this study was to identify the clinical characteristics ...
p-Phenylenediamine - Cosmetics Info
What Is It? p-Phenylenediamine, p-Phenylenediamine HCl and p-Phenylenediamine Sulfate are hair dye ingredients used in the formulation of permanent hair dyes, colors, and tints. p-Phenylenediamine appears as white to light purple crystals.
Para-phenylenediamine allergy: current perspectives on …
Abstract. Para-phenylenediamine (PPD) is the commonest and most well-known component of hair dyes. Oxidative hair dyes and dark henna temporary tattoos contain PPD. Individuals may be sensitized to PPD by temporary henna tattooing in addition to dyeing their hair. PPD allergy can cause severe reactions and may result in complications.