Melting point :113-115 °C(lit.)
Boiling point :293°C
Density :1.31
vapor density :3.73 (vs air)
vapor pressure :0.1 mm Hg ( 25 °C)
refractive index :n20/D 1.453
Flash point :38°C
storage temp. :room temp
solubility :10g/l
form :Powder
pka :7.7
color :Yellow to green
Odor :irritant odor
PH :4 (1g/l, H2O, 20℃)
Water Solubility :10 g/L (25 ºC)
Merck :14,8074
BRN :773967
Exposure limits :TLV-TWA 0.4 mg/m³ (0.1 ppm); STEL 1.2 mg/m³ (0.3 ppm) (ACGIH); IDLH 75 ppm (NIOSH).
Stability :Stable, but light sensitive. Incompatible with strong oxidizing agents. Flammable.
InChIKey :AZQWKYJCGOJGHM-UHFFFAOYSA-N
LogP :0.1-0.3 at 23℃ and pH4.8-5.3
CAS DataBase Reference :106-51-4(CAS DataBase Reference)
IARC :3 (Vol. 15, Sup 7, 71) 1999
NIST Chemistry Reference :p-Benzoquinone(106-51-4)
EPA Substance Registry System :Quinone (106-51-4)

Symbol(GHS):
Signal word:	Danger
Hazard statements:	Code Hazard statements Hazard class Category Signal word Pictogram P-Codes H228 Flammable solid Flammable solids Category 1 Category 2 Danger Warning P210, P240,P241, P280, P370+P378 H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501 H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501 H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning H341 Suspected of causing genetic defects Germ cell mutagenicity Category 2 Warning P201,P202, P281, P308+P313, P405,P501 H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:	P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P280 Wear protective gloves/protective clothing/eye protection/face protection. P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.