Benzoquinone
- 2,5-Cyclohexadiene-1,4-dione
- p-Quinone
- Quinone
- 1,4-Benzoquinone
Benzoquinone | |
| |
| Formula | 4-(O=)C6H4=O |
| Structure | |
| Description | Yellow solid, acrid chlorine-like odor. |
| Uses | Tanning hides, making gelatin insol, strengthening animal fibers. |
| Registry Numbers and Inventories. | |
| CAS | 106-51-4 |
| EC (EINECS/ELINCS) | 203-405-2 |
| EC Index Number | 606-013-00-3 |
| EC Class | Toxic; Irritant; Dangerous for the Environment |
| EC Risk Phrase | R 23/25 36/37/38 50 |
| EC Safety Phrase | S 26 28 45 61 |
| RTECS | DK2625000 |
| RTECS class | Agricultural Chemical and Pesticide; Tumorigen; Mutagen |
| UN (DOT) | 2587 |
| Merck | 12,8259 |
| Beilstein/Gmelin | 773967 |
| Beilstein Reference | 4-07-00-02065 |
| RCRA | U197 |
| EPA OPP | 59805 |
| Swiss Giftliste 1 | G-1228 |
| Canada DSL/NDSL | DSL |
| US TSCA | Listed |
| Austrailia AICS | Listed |
| New Zealand | Listed |
| Japan ENCS (MITI) | Listed |
| Korea ECL | Listed |
| Properties. | |
| Formula | C6H4O2 |
| Formula mass | 108.10 |
| Melting point, °C | 112 - 114 |
| Boiling point, °C | 174 |
| Vapor pressure, mmHg | 1.2 (25 C) |
| Vapor density (air=1) | 3.7 |
| Saturation Concentration | 118 ppm (0.01%) at 20 C (calculated) |
| Density | 1.318 g/cm3 (20 C) |
| Solubility in water | 10 g/L |
| Viscosity | 3.2585x10-2 n/m @ melting point |
| Surface tension | 31.81 g/s2 (124 C) |
| Partition coefficient, pKow | 0.20 |
| Heat of vaporization | 41.0 kJ/mol |
| Heat of combustion | -2757 kJ/mol |
| Hazards and Protection. | |
| Storage | Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. |
| Handling | Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Minimize dust generation and accumulation. May form flammable dust-air mixtures. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. |
| Protection | Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure. |
| Respirators | Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary. |
| Small spills/leaks | Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Remove all sources of ignition. Provide ventilation. |
| Disposal code | 9 |
| Stability | Stable under normal temperatures and pressures. |
| Incompatibilities | Oxidizing agents. Attacks some forms of coatings, plastics and rubber. |
| Decomposition | Carbon monoxide, carbon dioxide. |
| Fire. | ||||
| Flash Point,°C | 59 | |||
| Autoignition, °C | 560 | |||
| Fire fighting | Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Dusts at sufficient concentrations can form explosive mixtures with air. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. | |||
| Fire potential | Combustible. | |||
| Hazards | When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. | |||
| Combustion products | Contain irritating and toxic fumes, including carbon dioxide and carbon monoxide. | |||
| NFPA | Health | 3 | ||
| Flammability | 2 | |||
| Reactivity | 0 | |||
| Health. | |
| Exposure limit(s) | TLV: 0.1 ppm; 0.44 mg/m3 (as TWA) (ACGIH 1997). OSHA PEL: TWA 0.4 mg/m3 (0.1 ppm) NIOSH REL: TWA 0.4 mg/m3 (0.1 ppm) NIOSH IDLH: 100 mg/m3 |
| Poison_Class | 3 |
| Exposure effects | Prolonged or repeated exposure may cause permanent eye damage. |
| Ingestion | Harmful if swallowed. May cause irritation of the digestive tract. Ingestion may cause convulsion, respiratory difficulties and decreased blood pressure. |
| Inhalation | Causes respiratory tract irritation. May cause adverse central nervous system effects including headache, convulsions, and possible death. May produce asphyxia due to pulmonary damage and effects on the hemoglobin. May produce clonic convulsions, respiratory difficulties, decreased blood pressure and death due to medullary centers. |
| Skin | Causes skin irritation. Depigmentation and skin lesions may occur. May cause discoloration, erythema, swelling, and the formation of papules and vesicles. Prolonged contact may lead to necrosis. |
| Eyes | Causes severe eye burns. Contact may cause discoloration, redness, swelling, and formation of eye lesions. May cause corneal edema, ulceration, and scarring. Prolonged exposure to vapor can lead to gradual deposition of pigment in the cornea and conjunctiva which may result in severe visual disturbances. Causes small opacities of the cornea and structural corneal changes that result in in loss of visual activity. Contact may cause discoloration, redness, swelling and formation of eye lesions. |
First aid | |
| Ingestion | If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately. |
| Inhalation | Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid. |
| Skin | Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. |
| Eyes | Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. |
| Transport. | ||
| UN number | 2587 |  |
| Response guide | 153 | |
| Hazard class | 6.1 | |
| Packing Group | II | |
| USCG CHRIS Code | BZQ | |
| HS Code | 2914 69 90 | |
| Std. Transport # | 4921544 | |