Butyl mercaptan
- 1-Butanethiol
- n-Butanethiol
- 1-Bercaptobutane
- Thiobutyl alcohol
- Butane-1-thiol
Butyl mercaptan | |
| |
| Formula | CH3(CH2)3SH |
| Structure | |
| Description | Colorless liquid with a very strong offensive, garlic-, cabbage-, or skunk-like odor. |
| Uses | As solvent. |
| Registry Numbers and Inventories. | |
| CAS | 109-79-5 |
| EC (EINECS/ELINCS) | 203-705-3 |
| EC Class | highly flammable, harmful |
| EC Risk Phrase | R 11 20/22 36/37/38 |
| EC Safety Phrase | S 16 26 36/37/39 |
| RTECS | EK6300000 |
| RTECS class | Reproductive Effector; Primary Irritant |
| UN (DOT) | 2347 |
| Merck | 12,1611 |
| Beilstein/Gmelin | 1730908 |
| Beilstein Reference | 4-01-00-01555 |
| EPA OPP | 125001 |
| Swiss Giftliste 1 | G-1337 |
| Canada DSL/NDSL | DSL |
| US TSCA | Listed |
| Austrailia AICS | Listed |
| New Zealand | Listed |
| Japan ENCS (MITI) | Listed |
| Properties. | |
| Formula | C4H10S |
| Formula mass | 90.19 |
| Melting point, °C | -116 |
| Boiling point, °C | 98 |
| Vapor pressure, mmHg | 155 (323 C) |
| Vapor density (air=1) | 3.1 |
| Saturation Concentration | 46060 ppm (4.6%) at 20 C; 109200 ppm (10.9%) at 25 C (calculated) |
| Evaporization number | 2.86 (n-butyl acetate = 1) |
| Critical temperature | 290 |
| Critical pressure | 38.9 |
| Density | 0.841 g/cm3 (20 C) |
| Solubility in water | 600 mg/L |
| Viscosity | 0.51 cp (20 C) |
| Surface tension | 25.57 g/s2 (22 C) |
| Refractive index | 1.44014 (20 C) |
| pKa/pKb | 10.61 (pKa) |
| Partition coefficient, pKow | 2.28 |
| Heat of fusion | 10.5 kJ/mol |
| Heat of vaporization | 32.2 kJ/mol |
| Heat of combustion | -3474 kJ/mol |
| Hazards and Protection. | |
| Storage | Keep away from heat, sparks, and flame. Keep away from sources of ignition. Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Flammables-area. Refrigerator (approx 4 C). |
| WHMIS | B2 D1B |
| Handling | Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. 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. Avoid ingestion and inhalation. 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 | Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions. |
| 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. Use a spark-proof tool. Provide ventilation. A vapor suppressing foam may be used to reduce vapors. |
| Disposal code | 6 |
| Stability | Stable under normal temperatures and pressures. |
| Incompatibilities | Oxidizing agents. |
| Decomposition | Carbon monoxide, oxides of sulfur, irritating and toxic fumes and gases, carbon dioxide, hydrogen sulfide. |
| Fire. | ||||
| Flash Point,°C | 12 | |||
| Autoignition, °C | 225 | |||
| Upper exp. limit, % | 10.20 | |||
| Lower exp. limit, % | 1.40 | |||
| Fire fighting | Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Will burn if involved in a fire. Use water spray to keep fire-exposed containers cool. Water may be ineffective. Material is lighter than water and a fire may be spread by the use of water. Containers may explode in the heat of a fire. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. For large fires, use water spray, fog, or alcohol-resistant foam. Use water spray to cool fire-exposed containers. Water may be ineffective. Do NOT use straight streams of water. | |||
| Fire potential | Flammable liquid and vapor. | |||
| Hazards | Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. | |||
| Combustion products | Irritating sulfur dioxide may form. | |||
| NFPA | Health | 1 | ||
| Flammability | 3 | |||
| Reactivity | 0 | |||
| Health. | |
| Exposure limit(s) | TLV: 0.5 ppm; 1.8 mg/m3 (as TWA) (ACGIH 1992-1993) OSHA PEL: TWA 10 ppm (35 mg/m3) NIOSH REL: C 0.5 ppm (1.8 mg/m3) 15-minute NIOSH IDLH: 500 ppm |
| Poison_Class | 4 |
| Exposure effects | Narcosis and paralysis may be caused with concentrated vapors. Drowsiness, weakness, and mild depression may be seen at exposures of 50 to 500 ppm for one hour. |
| Ingestion | May cause gastrointestinal irritation with nausea, vomiting and diarrhea. Mercaptans may cause nausea and headache. Exposure to high concentrations of mercaptans can produce unconsciousness with cyanosis, cold extremities and rapid pulse. May be harmful if swallowed. |
| Inhalation | May cause respiratory tract irritation. Vapors may cause dizziness or suffocation. May produce nausea in low concentration and pulmonary edema in high concentrations. Exposure to high concentrations of mercaptans can produce unconsciousness with cyanosis, cold extremities and rapid pulse. Mercaptans may cause nausea and headache. |
| Skin | May cause skin irritation. |
| Eyes | Causes eye irritation. |
First aid |
|
| Ingestion | Never give anything by mouth to an unconscious person. Get medical aid. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water. |
| 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. |
| Transport. | ||
| UN number | 2347 | |
| Response guide | 130 | |
| Hazard class | 3 | |
| Packing Group | II | |
| USCG CHRIS Code | BTM | |
| HS Code | 2930 90 70 | |
| Std. Transport # | 4909133 | |