Methyl isocyanate

Methyl isocyanate
Names
	Preferred IUPAC name Isocyanatomethane
	Other names Methyl carbylamine; MIC
Identifiers
CAS Number	624-83-9 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:59059 ;
ChemSpider	11727 ;
ECHA InfoCard	100.009.879
IUPHAR/BPS	6290;
PubChem CID	12228;
UNII	C588JJ4BV9 ;
CompTox Dashboard (EPA)	DTXSID1023786 ;
	InChI InChI=1S/C2H3NO/c1-3-2-4/h1H3 Key: HAMGRBXTJNITHG-UHFFFAOYSA-N ;
	SMILES O=C=NC;
Properties
Chemical formula	C2H3NO
Molar mass	57.051 g/mol
Appearance	Colorless liquid
Odor	Sharp, pungent odor
Density	0.9230 g/cm3 at 27 °C
Melting point	−45 °C (−49 °F; 228 K)
Boiling point	38.3–41 °C (100.9–105.8 °F; 311.4–314.1 K)
Solubility in water	10% (15°C)
Vapor pressure	57.7 kPa
Structure
Dipole moment	2.8 D
Thermochemistry
Std enthalpy of; formation (ΔfH⦵298)	−92.0 kJ·mol−1
Std enthalpy of; combustion (ΔcH⦵298)	-1.1275E+06 J/mol
Hazards
	GHS labelling:
Pictograms
Hazard statements	H225, H300, H311, H315, H317, H318, H330, H334, H335, H361d
Precautionary statements	P201, P202, P210, P233, P240, P241, P242, P243, P260, P261, P264, P270, P271, P272, P280, P281, P284, P285, P301+P310, P302+P352, P303+P361+P353, P304+P340, P304+P341, P305+P351+P338, P308+P313, P310, P312, P320, P321, P322, P330, P332+P313, P333+P313, P342+P311, P361, P362, P363, P370+P378, P403+P233, P403+P235, P405, P501
NFPA 704 (fire diamond)	4 3 3 W
Flash point	−7 °C (19 °F; 266 K)
Autoignition; temperature	534 °C (993 °F; 807 K)
Explosive limits	5.3–26%
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	120 mg/kg (oral, mouse); 51.5 mg/kg (oral, rat)
LC50 (median concentration)	6.1 ppm (rat, 6 hr); 12.2 ppm (mouse, 6 hr); 5.4 ppm (guinea pig, 6 hr); 21 ppm (rat, 2 hr)
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 0.02 ppm (0.05 mg/m3) [skin]
REL (Recommended)	TWA 0.02 ppm (0.05 mg/m3) [skin]
IDLH (Immediate danger)	3 ppm
Related compounds
Related compounds	Methyl isothiocyanate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Methyl isocyanate (MIC) is an organic compound with the molecular formula CH₃NCO. Synonyms are isocyanatomethane and methyl carbylamine. Methyl isocyanate is an intermediate chemical in the production of carbamate pesticides (such as carbaryl, carbofuran, methomyl, and aldicarb). It has also been used in the production of rubbers and adhesives. As an extremely toxic and irritating compound, it is very hazardous to human health. MIC was the principal toxicant involved in the Bhopal gas disaster, which eventually killed around 20,000 people in total as per official figures. It is also a very potent lachrymatory agent.

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