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Methyl isocyanate |
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Synonyms & Trade NamesMethyl ester of isocyanic acid, MIC |
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CAS No.624-83-9 |
RTECS No.NQ9450000 |
DOT ID & Guide2480 155 |
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FormulaCH3NCO |
Conversion1 ppm = 2.34 mg/m3 |
IDLH3 ppmSee: 624839 |
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Exposure LimitsNIOSH REL: TWA 0.02 ppm (0.05 mg/m3) [skin]OSHA PEL: TWA 0.02 ppm (0.05 mg/m3) [skin] |
Measurement MethodsOSHA 54 See: NMAM or OSHA Methods |
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Physical DescriptionColorless liquid with a sharp, pungent odor. |
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MW:57.1 |
BP:102-104°F |
FRZ:-49°F |
Sol(59°F): 10% | VP:348 mmHg |
IP:10.67 eV |
Sp.Gr:0.96 |
Fl.P:19°F |
UEL:26% |
LEL:5.3% |
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Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F. | |||||
Incompatibilities & ReactivitiesWater, oxidizers, acids, alkalis, amines, iron, tin, copper [Note: Usually contains inhibitors to prevent polymerization.] |
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Exposure Routesinhalation, skin absorption, ingestion, skin and/or eye contact |
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Symptomsirritation eyes, skin, nose, throat; resp sensitization, cough, pulmonary secretions, chest pain, dyspnea (breathing difficulty); asthma; eye, skin damage; in animals: pulmonary edema |
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Target OrgansEyes, skin, respiratory system |
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Personal Protection/Sanitation(See protection codes)Skin: Prevent skin contact Eyes: Prevent eye contact Wash skin: When contaminated Remove: When wet (flammable) Change: No recommendation Provide: Eyewash, Quick drench |
First Aid(See procedures)Eye: Irrigate immediately Skin: Water flush immediately Breathing: Respiratory support Swallow: Medical attention immediately |
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Respirator RecommendationsNIOSH/OSHA Up to 0.2 ppm: Up to 0.5 ppm: Up to 1 ppm: Up to 3 ppm: Emergency or planned entry into unknown concentrations or IDLH conditions: Escape: |
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See also: INTRODUCTION See ICSC CARD: 0004 See MEDICAL TESTS: 0143 |
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