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O-Phenylenediamine

O-Phenylenediamine
Names Preferred IUPAC name
Benzene-1,2-diamine
Other names
o-Phenylene diamine
1,2-Diaminobenzene
1,2-Phenylenediamine
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard100.002.210EC Number
  • 202-430-6
RTECS number
  • SS7875000
UNII
UN number1673
  • InChI=1S/C6H8N2/c7-5-3-1-2-4-6(5)8/h1-4H,7-8H2
    Key: GEYOCULIXLDCMW-UHFFFAOYSA-N
  • InChI=1/C6H8N2/c7-5-3-1-2-4-6(5)8/h1-4H,7-8H2
    Key: GEYOCULIXLDCMW-UHFFFAOYAR
  • Nc1ccccc1N
Properties C6H8N2Molar mass108.144 g·mol Appearance white solid Density1.031 g/cm Melting point102 to 104 °C (216 to 219 °F; 375 to 377 K) Boiling point252 °C (486 °F; 525 K) Other sources: 256 to 258 °C (493 to 496 °F; 529 to 531 K) soluble in hot water Acidity (pKa)
  • 0.80 (doubly protonated form; 20 °C, H2O)
  • 4.57 (conjugate acid; 20 °C, H2O)
−71.98·10 cm/mol Hazards GHS labelling: DangerH301, H312, H317, H319, H332, H341, H351, H410P201, P202, P261, P264, P270, P271, P272, P273, P280, P281, P301+P310, P302+P352, P304+P312, P304+P340, P305+P351+P338, P308+P313, P312, P321, P322, P330, P333+P313, P337+P313, P363, P391, P405, P501NFPA 704 (fire diamond)
3
1
0
Flash point156 °C (313 °F; 429 K) Safety data sheet (SDS) Oxford MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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o-Phenylenediamine (OPD) is an organic compound with the formula C6H4(NH2)2. This aromaticdiamine is an important precursor to many heterocyclic compounds. OPD is a white compound although samples appear darker owing to oxidation by air. It is isomeric with m-phenylenediamine and p-phenylenediamine.

Wikipedia source