Methyl chloride |
Synonyms & Trade Names Chloromethane, Monochloromethane |
CAS No. 74-87-3 |
RTECS No. PA6300000 |
DOT ID & Guide 1063 115 |
FormulaCH3Cl |
Conversion 1 ppm = 2.07 mg/m3 |
IDLH Ca [2000 ppm]
See: 74873 |
Exposure Limits NIOSH REL: Ca See Appendix A
OSHA PEL†: TWA 100 ppm C 200 ppm 300 ppm (5-minute maximum peak in any 3 hours) |
Measurement Methods
NIOSH 1001
See: NMAM or OSHA Methods |
Physical Description Colorless gas with a faint, sweet odor which is not noticeable at dangerous concentrations. [Note: Shipped as a liquefied compressed gas.] |
MW: 50.5 |
BP: -12°F |
FRZ: -144°F |
Sol: 0.5% |
VP: 5.0 atm |
IP: 11.28 eV |
|
Fl.P: NA (Gas) |
UEL: 17.4% |
LEL: 8.1% |
RGasD: 1.78 |
|
| Flammable Gas |
Incompatibilities & Reactivities Chemically-active metals such as potassium, powdered aluminum, zinc & magnesium; water [Note: Reacts with water (hydrolyzes) to form hydrochloric acid.] |
Exposure Routes inhalation, skin and/or eye contact (liquid) |
Symptoms dizziness, nausea, vomiting; visual disturbance, stagger, slurred speech, convulsions, coma; liver, kidney damage; liquid: frostbite; reproductive, teratogenic effects; [potential occupational carcinogen] |
Target Organs central nervous system, liver, kidneys, reproductive system |
Cancer Site[in animals: lung, kidney & forestomach tumors] |
Personal Protection/Sanitation (See protection codes)
Skin: Frostbite
Eyes: Frostbite
Wash skin: No recommendation
Remove: When wet (flammable)
Change: No recommendation
Provide: Frostbite wash |
First Aid (See procedures)
Eye: Frostbite
Skin: Frostbite
Breathing: Respiratory support
|
Respirator Recommendations NIOSH At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus Escape:
Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 0419 See MEDICAL TESTS: 0140 |
