Properties :
Vapor density : 2.77 (vs air)
Vapor pressure :
  166 mmHg (37.7 °C)
  74.6 mmHg (20 °C)
Autoignition temp.: 1043 °F
Expl. lim.: 8 %
Total impurities :
  ≤ 0.0001 % thiophene
  ≤ 0.0002 % free alkali (as NH₃)
  ≤ 0.0004 % free acid (as HCl)
  ≤ 0.0005 % other S-compounds (as S)
  ≤ 0.001 % non-volatile matter
  ≤ 0.03 % water (Karl Fischer)
refractive index :
  n_20/D = 1.5000-1.5020
  n_20/D = 1.501 (lit.)
bp = 80 °C (lit.)
mp = 5.5 °C (lit.)
Transition temp solidification point : ≥ 5.2°C
Density : 0.874 g/mL at 25°C (lit.)
Cation traces :
  Al : ≤ 0.5 mg/kg
  B : ≤ 0.02 mg/kg
  Ba : ≤ 0.1 mg/kg
  Ca : ≤ 0.5 mg/kg
  Cd : ≤ 0.05 mg/kg
  Co : ≤ 0.02 mg/kg
  Cr : ≤ 0.02 mg/kg
  Cu : ≤ 0.01 mg/kg
  Fe : ≤ 0.1 mg/kg
  Mg : ≤ 0.1 mg/kg
  Mn : ≤ 0.02 mg/kg
  Ni : ≤ 0.02 mg/kg
  Pb : ≤ 0.01 mg/kg
  Sn : ≤ 0.1 mg/kg
  Zn : ≤ 0.01 mg/kg
suitability passes test for reaction against H₂SO₄.

RIDADR : UN 1114 / Classe 3 / Packing Group : 2.