Phenyl mercaptan
- Thiophenol
- Benzenethiol
- Mercaptobenzene
Phenyl mercaptan | |
| |
| Formula | C6H5SH |
| Structure | |
| Description | Water-white to light yellow liquid with a penetrating, repulsive, nauseating odor resembling strong garlic or burnt rubber. |
| Uses | Chemical intermediate for carbophenothion insecticide & acaricide, fungicides, eg, fonofos, chemical intermediate for its sodium salt, alkyl phenyl sulfides, pharmaceuticals, pentachlorothiophenol & its zinc salt & intermediate for polymers (eg, with formaldehyde, other phenols). |
| Registry Numbers and Inventories. | |
| CAS | 108-98-5 |
| EC (EINECS/ELINCS) | 203-635-3 |
| EC Class | flammable, very toxic, irritant |
| EC Risk Phrase | R 10 24/25 26 34 |
| EC Safety Phrase | S 26 28 36/37/39 45 |
| RTECS | DC0525000 |
| RTECS class | Reproductive Effector; Primary Irritant |
| UN (DOT) | 2337 |
| Merck | 12,9492 |
| Beilstein/Gmelin | 506523 |
| Beilstein Reference | 4-06-00-01463 |
| RCRA | P014 |
| Swiss Giftliste 1 | G-1239 |
| Canada DSL/NDSL | DSL |
| US TSCA | Listed |
| Austrailia AICS | Listed |
| New Zealand | Listed |
| Japan ENCS (MITI) | Listed |
| Korea ECL | Listed |
| Properties. | |
| Formula | C6H6S |
| Formula mass | 110.18 |
| Melting point, °C | -15 |
| Boiling point, °C | 169 |
| Vapor pressure, mmHg | 2 (25 C) |
| Vapor density (air=1) | 3.8 |
| Saturation Concentration | 0.18% at 20 C |
| Critical temperature | 415 |
| Critical pressure | 35.3 |
| Density | 1.0728 g/cm3 (20 C) |
| Solubility in water | Slightly soluble |
| Viscosity | 1.25 cp (22 C) |
| Surface tension | 39.0 g/s2 |
| Refractive index | 1.5879 (24 C) |
| pKa/pKb | 6.62 (pKa) |
| Partition coefficient, pKow | 2.52 |
| Heat of fusion | 11.5 kJ/mol |
| Heat of vaporization | 39.9 kJ/mol |
| Heat of combustion | -3886 kJ/mol |
| Hazards and Protection. | |
| Storage | Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. |
| WHMIS | B3 D1A D2B |
| Handling | Wash thoroughly after handling. Use with adequate ventilation. Ground and bond containers when transferring material. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Do not ingest or inhale. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. |
| 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 | Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. |
| Disposal code | 9 |
| Stability | Stable under normal temperatures and pressures. |
| Incompatibilities | Oxidizing agents, hydrogen peroxide, iron (III) sulfate, sulfuric acid |
| Decomposition | Nitrogen oxides, carbon monoxide, carbon dioxide. |
| Fire. | ||||
| Flash Point,°C | 50 | |||
| Lower exp. limit, % | 1.2 | |||
| Fire fighting | Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Use water spray to keep fire-exposed containers cool. Containers may explode in the heat of a fire. Containers may explode when heated. Extinguishing media: Use water spray to cool fire-exposed containers. Water may be ineffective. Do NOT use straight streams of water. For large fires, use water spray, fog or regular foam. For small fires, use dry chemical, carbon dioxide, water spray or regular foam. Cool containers with flooding quantities of water until well after fire is out. | |||
| Fire potential | Flammable. Not combustible. | |||
| Hazards | When heated to decomposition or on contact with acids, it emits toxic fumes of sulfur oxides. May be ignited by heat, sparks or flames. Container may explode in heat of fire. Vapor explosion and poison hazard indoors, outdoors or in sewers. Unstable, oxidizes in air. Avoid contact with acids. | |||
| Combustion products | Fire will produce irritating, corrosive and/or toxic gases. | |||
| NFPA | Health | 2 | ||
| Flammability | 2 | |||
| Reactivity | 0 | |||
| Health. | |
| Poison_Class | 2 |
| Exposure effects | Because of this compound's extremely low olfactory threshold, exposures may be substantially lower than clinical signs may indicate. In animals at higher levels of exposure, respiratory rate increases initally followed by cyanosis, respiratory depression, and death. CNS excitation, followed by CNS depression, occurred in animals. Thiophenol had a pronounced soporific (sleep-inducing) effect. A NOAEL for developmental toxicity was > 40 mg/kg/day in the rabbit. Post-implantation mortality was observed in rats. |
| Ingestion | Harmful if swallowed. May cause irritation of the digestive tract. Intoxication may include weight loss, diarrhea, weakness, ataxia, and unconsciousness. |
| Inhalation | Vapors may cause dizziness or suffocation. Exposure may give rise to flushing of face, skin rash, an increase in heart and respiration rates, headaches, giddiness, nausea, and vomiting. |
| Skin | Causes severe skin irritation. |
| Eyes | Causes eye irritation. |
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. |
| Eyes | Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. |
| Transport. | ||
| UN number | 2337 | |
| Response guide | 131 | |
| Hazard class | 6.1 | |
| PRTC | T | |
| Packing Group | III | |
| USCG CHRIS Code | BZT | |
| HS Code | 2930 90 70 | |
| Std. Transport # | 4921413 | |