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| Methyl chloride | CAS 74-87-3 | ||
| CH3Cl | RTECS PA6300000 | ||
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Synonyms & Trade Names Chloromethane, Monochloromethane |
DOT ID & Guide 1063 115 |
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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) | |||
| IDLH Ca [2000 ppm] See: 74873 | Conversion 1 ppm = 2.07 mg/m3 | ||
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Physical Description Colorless gas with a faint, sweet odor which is not noticeable at dangerous concentrations. [Note: Shipped as a liquefied compressed gas.] |
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MW: 50.5 |
BP: -12°F |
FRZ: -144°F |
Sol: 0.5% |
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VP: 5.0 atm |
IP: 11.28 eV |
RGasD: 1.78 |
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Fl.P: NA (Gas) |
UEL: 17.4% |
LEL: 8.1% |
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| Flammable Gas | |||
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Incompatibilities & Reactivities Chemically-active metals such as potassium, powdered aluminum, zinc & magnesium; water [Note: Reacts with water (hydrolyzes) to form hydrochloric acid.] |
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Measurement Method Charcoal tube(2); CH2Cl2; Gas chromatography/Flame ionization detection; IV [#1001] See: NMAM INDEX |
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Personal Protection & Sanitation Skin: Frostbite Eyes: Frostbite Wash skin: N.R. Remove: When wet (flammable) Change: N.R. Provide: Frostbite |
First Aid (See procedures) Eye: Frostbite Skin: Frostbite Breathing: Respiratory support |
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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 |
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| 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] | |
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Target Organs
central nervous system, liver, kidneys, reproductive system Cancer Site [in animals: lung, kidney & forestomach tumors] |
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| See also: INTRODUCTION See ICSC CARD: 0419 See MEDICAL TESTS: 0140 |