Perchloromethylmercaptan(594-42-3)
Product Identification
Product Name
Perchloromethylmercaptan
Synonyms
PPM
Thiocarbonyl tetrachloride
Trichloromethanesulfenyl chloride
Trichloromethyl sulfur chloride
Trichloromethyl thiohypochlorite
CAS
594-42-3
Formula
CCl4S
Molecular Weight
185.87
EINECS
209-840-4
RTECS
PB0370000
RTECS Class
Primary Irritant
Beilstein/Gmelin
506034
Beilstein Reference
4-03-00-00290
Physical and Chemical Properties
Appearance
A yellow oily liquid with an offensive odor.
Solubility in water
Insoluble
Melting Point
-44
Boiling Point
149
Vapor Pressure
4.7 (25 C)
Density
1.722 g/cm3 (0 C)
Partition Coefficient
4.67
Heat Of Vaporization
37.2 kJ/mol
Usage
Used as an intermediate for the synthesis of dyes & fungicides (captan, folpet).
Vapor Density
6.414
Refractive Index
1.54835
First Aid Measures
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.
Handling and Storage
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.
Hazards Identification
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.
Ingestion
Nausea, vomiting, diarrhea, abdominal pain and mucosal ulceration may be seen.
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.
EC Risk Phrase
R 21 23/25 34
EC Safety Phrase
S 26 36/37/39 45
UN (DOT)
1670
Exposure Controls/Personal Protection
Personal 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.
Exposure Effects
Fever may be noted in patients with severe inhalation exposure and respiratory tract injury. Central nervous system depression and seizures may develop.
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
Fire Fighting Measures
Flash Point
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.
Stability and Reactivity
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.
Stability
Mildly decomposed by moist air.
Decomposition
Decomposes between 148-9 C.
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.