Perchloromethyl mercaptan
- PPM
- Trichloromethyl sulfur chloride
- Trichloromethanesulfenyl chloride
- Thiocarbonyl tetrachloride
Perchloromethyl mercaptan | |
| |
| Formula | CCl4S |
| Structure | |
| Description | A yellow oily liquid with an offensive odor. |
| Uses | Used as an intermediate for the synthesis of dyes & fungicides (captan, folpet). |
| Registry Numbers and Inventories. | |
| CAS | 594-42-3 |
| EC (EINECS/ELINCS) | 209-840-4 |
| EC Risk Phrase | R 21 23/25 34 |
| EC Safety Phrase | S 26 36/37/39 45 |
| RTECS | PB0370000 |
| RTECS class | Primary Irritant |
| UN (DOT) | 1670 |
| Beilstein/Gmelin | 506034 |
| Beilstein Reference | 4-03-00-00290 |
| EPA OPP | 477300 |
| Swiss Giftliste 1 | G-2707 |
| Canada DSL/NDSL | NDSL |
| US TSCA | Listed |
| New Zealand | Listed |
| Japan ENCS (MITI) | Listed |
| Properties. | |
| Formula | CCl4S |
| Formula mass | 185.87 |
| Melting point, °C | -44 |
| Boiling point, °C | 149 |
| Vapor pressure, mmHg | 4.7 (25 C) |
| Vapor density (air=1) | 6.414 |
| Critical temperature | 367 |
| Critical pressure | 54.8 |
| Density | 1.722 g/cm3 (0 C) |
| Solubility in water | Insoluble |
| Surface tension | 35.02 g/s2 (20 C) |
| Refractive index | 1.54835 |
| Partition coefficient, pKow | 4.67 |
| Heat of vaporization | 37.2 kJ/mol |
| Hazards and Protection. | |
| Storage | Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage. |
| Handling | All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood. |
| Protection | Organic- and acid-type canister mask or self-contained breathing apparatus; goggles or face shield; rubber gloves. Wear appropriate eye protection and protective clothing to prevent skin and eye contact. |
| Respirators | Any self contained breathing apparatus with a full facepiece and operated in a pressure demand or other positive pressure mode or any supplied air respirator with a full facepiece and operated in a pressure demand or other positive pressure mode in combination with an auxiliary self contained breathing apparatus operated in pressure demand or other positive pressure mode. |
| Small spills/leaks | Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors. |
| Stability | Mildly decomposed by moist air. |
| Incompatibilities | Incompatible with acids, diazo and azo compounds, halocarbons, isocyanates, aldehydes, alkali metals, nitrides, hydrides, and other strong reducing agents Reactions with these materials generate heat and in many cases hydrogen gas Reacts readily with oxidizing agents. |
| Decomposition | Decomposes between 148-9 C. |
| Fire. | ||||
| Flash Point,°C | 53 | |||
| Fire fighting | Fight fire from maximum distance. Dike fire control water for later disposal; do not scatter the material. Positive pressure breathing apparatus and special protective clothing should be worn.This compound is neither flammable nor a serious fire hazard, although it will support combustion. Fight small fires with dry chemical, carbon dioxide, water spray, or foam, and large fires with water spray, fog, or foam. Move containers containing this compound away from fire area if possible. | |||
| Fire potential | This compound is neither flammable nor serious fire hazard, although it will support combustion. | |||
| Hazards | Very irritating vapors formed from hot material; may form phosgene gas, hydrogen chloride, and sulfur dioxide. At high temperatures this compound will decompose to carbon tetrachloride, sulfur chloride, heavy oil polymers, phosgene gas, hydrogen chloride, and sulfur dioxide. Reacts with iron or steel, evolving carbon tetrachloride. Corrosive to most metals. Reacts with water only when hot to give carbon dioxide, hydrochloric acid, and sulfur. | |||
| Combustion products | Toxic gases and vapors (such as carbon tetrachloride, hydrogen sulfide, sulfur dioxide, and carbon monoxide) may be released in fire involving perchloromethyl mercaptan. | |||
| NFPA | Health | 3 | ||
| Flammability | 0 | |||
| Reactivity | 2 | |||
| Health. | |
| Exposure limit(s) | TLV: 0.1 ppm; 0.76 mg/m3 (ACGIH 1994-1995). OSHA PEL: TWA 0.1 ppm (0.8 mg/m3) NIOSH REL: TWA 0.1 ppm (0.8 mg/m3) NIOSH IDLH: 10 ppm |
| Poison_Class | 1 |
| Exposure effects | Fever may be noted in patients with severe inhalation exposure and respiratory tract injury. Central nervous system depression and seizures may develop. |
| Ingestion | Nausea, vomiting, diarrhea, abdominal pain and mucosal ulceration may be seen. |
| Inhalation | Severe respiratory tract irritation with cough, chest tightness or discomfort, or pulmonary edema may be seen. Necrotizing tracheitis was found in a fatal case with inhalation and dermal exposure. |
| Skin | Skin irritation may occur. |
| Eyes | Inflammation of the eye, tearing, and mucosal irritation of the nose and throat may be noted. |
First aid |
|
| Ingestion | The possible benefit of early removal of some ingested material by cautious gastric lavage must be weighed against potential complications of bleeding or perforation. Activated charcoal activated charcoal binds most toxic agents and can decrease their systemic absorption if administered soon after ingestion. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents. |
| Inhalation | Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols. |
| Skin | Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists. Treatment should include recommendations listed in the oral exposure section when appropriate. |
| Eyes | Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility. |
| Transport. | ||
| UN number | 1670 | |
| Response guide | 157 | |
| Hazard class | 6.1 | |
| PRTC | T | |
| Packing Group | I | |
| USCG CHRIS Code | PCM | |
| Std. Transport # | 4921473 | |