phenylenediamine


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phenylenediamine

[¦fen·əl‚ēn′dī·ə‚mēn]
(organic chemistry)
C6H4(NH2)2 Also known as diaminobenzene. Any of three toxic isomeric crystalline compounds that are diamino derivatives of benzene; the ortho form, toxic colorless crystals melting at 102-104°C and soluble in alcohol, ether, water, and chloroform, is used to manufacture dyes, in photographic developers, and as a chemical intermediate; the meta form, colorless crystals unstable in air, melting at 63°C, and soluble in alcohol, ether, and water, is used to manufacture dyes, in textile dyeing, and as a nitrous acid detector; the para form, white to purple crystals melting at 147°C, soluble in alcohol and ether, and irritating to the skin, is used to manufacture dyes, in chemical analysis, and in photographic developers.
References in periodicals archive ?
The mechanism of dyeing is mainly related to the staining properties of constituent lawsone, and modified henna products such as black henna are available by adding para- phenylenediamine (PPD) to henna powder.
To solve this problem, the complex Cd(II) tetrafluoroborates with isomeric phenylenediamines were synthesized and investigated: o-phenylenediamine (OPD, [pK.
He offered the mnemonic MAFLPP (More Allergies for Lovable Pediatric Patients) to characterize the top categories: metals (nickel and cobalt), antibiotics (neomycin and bacitracin), fragrance (fragrances and balsam of Peru), lanolin, phenylenediamine, and preservatives (including quatemium-15 and methylisothiazolinone).
Co-polymerization of p-aminophenol and p- phenylenediamine at carbon and titanium electrodes:
However, they still contain some phenylenediamine or PPD, just a lower level.
The cause was PPD, phenylenediamine, a chemical which is used extensively in hair dye and which street traders were using mixed with convential henna because it was cheaper and produced faster results.
4 The activity was measured as phenylenediamine oxidase activity of ceruloplasmin, with the spectrophotometer at 530nm wavelength.
This work reports the development of an HPLC procedure for the analysis a-keto acids in blood and urine samples after derivatization with 4-nitro-1,2- phenylenediamine (NPD).
Trypsin-EDTA, insulin, dexamethasone, 3-isobutyl-l-methylxanthine, and -o phenylenediamine dihydrochloride were obtained from Sigma Chemical Co.
Included is a rubber composition for tires including: a rubber component; a naturally occurring wax containing 40-98% by mass of an ester component; a phenylenediamine antioxidant and/or a quinone antioxidant; and a specific nonionic surfactant, the rubber composition having an amount of diene rubber of 70-100% by mass per 100% by mass of the rubber component, the rubber composition having an amount of the naturally occurring wax of 0.