p-Benzoquinone , Used for spectral metering, ≥99.5%(HPLC) , 106-51-4
Synonym(s):
p-Benzoquinone;,5-Cyclohexadiene-1,4-dione;p-Benzoquinone;p-Quinone, 1,4-Benzoquinone, 1,4-Cyclohexadiene-3,6-dione;Quinone
CAS NO.：106-51-4
Empirical Formula: C6H4O2
Molecular Weight: 108.09
MDL number: MFCD00001591
EINECS: 203-405-2
PRODUCT Properties
| 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) |
Description and Uses
Quinone (p-benzoquinone) exists as a large yellow, monoclinic prism with an irritating odour resembling that of chlorine. Quinone is extensively used as a chemical intermediate, a polymerisation inhibitor, an oxidising agent, a photographic chemical, a tanning agent, and a chemical reagent. Quinone (p-benzoquinone) was first produced commercially in 1919 and has since been manufactured in several European countries. Its major use is in hydroquinone production, but it is also used as a polymerisation inhibitor and as an intermediate in the production of a variety of substances, including rubber accelerators and oxidising agents. It is used in the dye, textile, chemical, tanning, and cosmetic industries. In chemical synthesis for hydroquinone and other chemicals, quinone is used as an intermediate. It is also used in the manufacturing industries and chemical laboratory associated with protein fibre, photographic film, hydrogen peroxide, and gelatin making. Occupational exposure to quinone may occur in the dye, textile, chemical, tanning, and cosmetic industries. Inhalation exposure to quinone may occur from tobacco smoke.
1,4-Benzoquinone is used in the manufacture of dyes, fungicide, and hydroquinone; for tanning hides; as an oxidizing agent; in photography; making gelatin insoluble; strengthening animal fibers and as reagent.
Safety
| Symbol(GHS) |      GHS02,GHS05,GHS06,GHS08,GHS09 |
| Signal word | Danger |
| Hazard statements | H228-H301+H331-H314-H317-H335-H341-H410 |
| Precautionary statements | P210-P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338 |
| Hazard Codes | T,N,Xn,F |
| Risk Statements | 23/25-36/37/38-50-20/21/22-11 |
| Safety Statements | 26-28-45-61-28A-23-16 |
| RIDADR | UN 2587 6.1/PG 2 |
| OEB | C |
| OEL | TWA: 0.4 mg/m3 (0.1 ppm) |
| WGK Germany | 3 |
| RTECS | DK2625000 |
| F | 8 |
| Autoignition Temperature | 815 °F |
| TSCA | Yes |
| HS Code | 2914 69 80 |
| HazardClass | 6.1 |
| PackingGroup | II |
| Hazardous Substances Data | 106-51-4(Hazardous Substances Data) |
| Toxicity | LD50 orally in rats: 130 mg/kg (Woodard) |
| IDLA | 100 mg/m3 |
