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m-Phenylenediamine Basic information
m-Phenylenediamine Chemical Properties
  • Melting point:64-66 °C
  • Boiling point:282-284 °C
  • Density 1,139 g/cm3
  • vapor density 3.7 (vs air)
  • vapor pressure 0.62 mm Hg ( 100 °C)
  • refractive index 1.6339
  • Flash point:>230 °F
  • storage temp. Store below +30°C.
  • solubility 350g/l
  • form pellets
  • pka5.11, 2.50(at 20℃)
  • color Yellow to light tan or brown gray
  • PH8 (100g/l, H2O, 20℃)
  • Water Solubility 350 g/L (25 ºC)
  • Sensitive Air Sensitive
  • Merck 14,7283
  • BRN 471357
  • CAS DataBase Reference108-45-2(CAS DataBase Reference)
  • IARC3 (Vol. 16, Sup 7) 1987
  • NIST Chemistry Reference1,3-Benzenediamine(108-45-2)
  • EPA Substance Registry System1,3-Phenylenediamine (108-45-2)
Safety Information
m-Phenylenediamine Usage And Synthesis
  • Chemical PropertiesGrey crystal granule
  • Chemical Propertiesm-Phenylenediamine is a colorless to white crystalline substance that turns red upon exposure to air
  • Uses1,3-Phenylenediamine is used in the foaming-type hair dye composition.
  • UsesThe appearance of the high purity of the m-phenylenediamine is snow white flake solid used as a synthetic electronic grade polyimide material and epoxy resin curing agent.
  • Synthesis Reference(s)Journal of the American Chemical Society, 102, p. 6182, 1980 DOI: 10.1021/ja00539a054
    The Journal of Organic Chemistry, 37, p. 930, 1972 DOI: 10.1021/jo00972a002
  • General DescriptionColorless or white colored needles that turn red or purple in air. Melting point 64-66 C. Density 1.14 g / cm3. Flash point 280 F. May irritate skin and eyes. Toxic by skin absorption, inhalation or ingestion. Used in aramid fiber manufacture, as a polymer additive, dye manufacturing, as a laboratory reagent, and in photography.
  • Air & Water ReactionsSoluble in water [Merck].
  • Reactivity Profilem-Phenylenediamine an aromatic amine, neutralizes acids, acid chlorides, acid anhydrides and chloroformates in exothermic reactions to form salts. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Incompatible with oxidizing agents .
  • Fire Hazardm-Phenylenediamine is combustible. Dust may form explosive mixtures in air
  • Safety ProfileSuspected carcinogen with experimental tumorigenic and teratogenic data. Poison by ingestion, intravenous, subcutaneous, and intraperitoneal routes. Mildly toxic by skin contact. Mutation data reported. Combustible when exposed to heat or flame. A hair dye ingredtent. When heated to decomposition it emits toxic fumes of NOx. See also other phenylenediamine entries and AMINES.
  • Potential ExposureUsed in making various dyes; as a curing agent for epoxy resin; rubber, textile fibers; urethanes, corrosion inhibitors; adhesives; in photographic and analytical procedures and processes.
  • Carcinogenicity"Occupational exposure to m-PDA may occur through inhalation and dermal contact with this compound at workplace where m-PDA is produced or used. The general population may be exposed to m-PDA via dermal contact with consumer products containing this compound."An IARC Working Group concluded, on the basis of lack of human data and inadequate animal data, that m-PDA was not classifiable (Group 3) as to its carcinogenicity to humans.
  • Metabolic pathwayBy the perfused rat liver, 1,3-diaminobenzene (MPD) is metabolized to three identified N-acetylated derivatives N-acetyl-1,3-diaminobenzene, N,N'- diacetyl-1,3-diaminobenzene, and N,N'-diacetyl-2,4- diaminophenol which are identical to the metabolites excreted in rat urine.
  • ShippingUN1673 Phenylenediamines (o-, m-, p-), Hazard Class: 6.1; Labels: 6.1-Poisonous materials.
  • Purification MethodsPurify the diamine by distillation under a vacuum followed by recrystallisation from EtOH (rhombs) and if necessary redistillation. It should be protected from light; otherwise it darkens rapidly. [Neilson et al. J Chem Soc 371 1962, IR: Katritzky & Jones J Chem Soc 3674, 2058 1959, UV: Forbes & Leckie Can J Chem 36 1371 1958.] The hydrochloride has m 277-278o, and the bis-4-chlorobenzenesulfonyl derivative has m 220-221o from H2O (214-215o, from MeOH/H2O) [Runge & Pfeiffer Chem Ber 90 1737 1957]. The acetate has m 191o. [Beilstein 13 IV 79.]
  • IncompatibilitiesDust may form explosive mixture with air. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides, acid chlorides; acid anhydrides; chloroformates. Heat and light contribute to instability. Keep away from metals.
  • Waste DisposalControlled incineration whereby oxides of nitrogen are removed from the effluent gas by scrubber, catalytic or thermal device.
m-Phenylenediamine Preparation Products And Raw materials
m-Phenylenediamine(108-45-2)Related Product Information
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