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Basic Orange 2

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Basic Orange 2 Basic information
Basic Orange 2 Chemical Properties
  • Melting point:235 °C (dec.)(lit.)
  • Boiling point:2262°C
  • Density 1.2171 (rough estimate)
  • refractive index 1.6110 (estimate)
  • storage temp. 2-8°C
  • solubility Solubility Soluble in water, ethanol, acetone, methyl cellosolve, xylene; practically insoluble in Ibenzene
  • form Crystalline Powder
  • Colour Index  11270
  • color Bordeaux to deep purple
  • OdorOdorless
  • PH RangeOrange (4.0) to yellow (7.0)
  • λmax449nm
  • Merck 13,2279
  • BRN 3724653
  • Major ApplicationRecording materials, waveguides, thin solid films, photographic materials, printing plates, inks, toners, detergents, corrosion inhibitors, rubber, textiles, hair dyes
  • CAS DataBase Reference532-82-1(CAS DataBase Reference)
  • IARC3 (Vol. 8, Sup 7) 1987
  • EPA Substance Registry SystemC.I. Basic Orange 2, monohydrochloride (532-82-1)
Safety Information
Basic Orange 2 Usage And Synthesis
  • UsesOrange dye for cotton and silk.
  • DefinitionA dye made from aniline.
  • General DescriptionRed-brown powder, large black shiny crystals with a green luster or purple powder.
  • Air & Water ReactionsAzo dyes can be explosive when suspended in air at specific concentrations.Slightly soluble in water.
  • Reactivity ProfileBasic Orange 2 is an azo compound. Toxic gases are formed by mixing compounds containing azo groups with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. Flammable gases are formed by mixing materials in this group with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides. Basic Orange 2 is incompatible with strong oxidizing agents.
  • HazardQuestionable carcinogen.
  • Fire HazardFlash point data for Basic Orange 2 are not available. Basic Orange 2 is probably combustible.
  • Safety ProfileModerately toxic by ingestion and subcutaneous routes. Questionable carcinogen with experimental tumorigenic data. Mutation data reported. When heated to decomposition it emits very toxic fumes of NO, and HCl. Used as a colorant in textiles, paper, leather, inks, wood, and biological stains
  • Purification MethodsIt is a red-brown powder which is recrystallised from H2O. It gives a yellow solution in conc H2SO4 which turns orange on dilution. Its solubility at 15o is 5.5% (H2O), 4.75% (EtOH), 6.0% (cellosolve), 9.5% (ethylene glycol), 0.005% (xylene) and is insoluble in *C6H6. The hydroiodide has m 184o (from EtOH) and the picrate forms red needles m 196o. [Muramatsu Bull Chem Soc Jpn 31 864 1958, Beilstein 6 IV 561.]
Basic Orange 2 Preparation Products And Raw materials
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