Melting point | 172-175 °C(lit.) |
Boiling point | 285 °C(lit.) |
density | 1.32 |
vapor density | 3.81 (vs air) |
vapor pressure | 1 mm Hg ( 132 °C) |
refractive index | 1.6320 |
Fp | 165 °C |
storage temp. | Store below +30°C. |
solubility | H2O: 50 mg/mL, clear |
pka | 10.35(at 20℃) |
form | Needle-Like Crystals or Crystalline Powder |
color | White to off-white |
Odor | odorless |
Water Solubility | 70 g/L (20 ºC) |
Sensitive | Air & Light Sensitive |
Merck | 14,4808 |
BRN | 605970 |
Henry's Law Constant | (x 10-9 atm?m3/mol): <2.07 at 20 °C (approximate - calculated from water solubility and vapor pressure) |
Exposure limits | NIOSH REL: 15-min ceiling 2, IDLH 50; OSHA PEL: TWA 2; ACGIH TLV: TWA 2 (adopted). |
Stability: | Stable. Combustible. Incompatible with strong oxidizing agents, strong bases, oxygen, ferric salts. Light and air-sensitive. Discolours in air. |
InChIKey | QIGBRXMKCJKVMJ-UHFFFAOYSA-N |
LogP | 0.59 at 20℃ |
CAS DataBase Reference | 123-31-9(CAS DataBase Reference) |
NIST Chemistry Reference | Hydroquinone(123-31-9) |
IARC | 3 (Vol. 15, Sup 7, 71) 1999 |
EPA Substance Registry System | Hydroquinone (123-31-9) |