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Methyl isocyanate

CAS 624-83-9

Methane, isocyanato-

Molecular structure of 624-83-9
US productionNot reported
Import value, 2024$171M
Top sourceHungary 35%

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

Why supply is unknown

Production is reported production, not a complete census of factories. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 292910 · basket

These shares come from HS customs code 292910, which covers 57 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
HU 35%HungaryDE 20%GermanyIT 15%ItalyCN 8%ChinaES 7%Spain

Why It Matters

No EPA sector or FDA product records name a use for this chemical.

Chemical Identity

CAS624-83-9
PubChem CIDNot recorded
DTXSIDDTXSID1023786
FormulaC2H3NO
Mol. Weight57.052 g/mol
SMILESCN=C=O

Data Sources

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Brief citations

Methyl isocyanate (CAS 624-83-9) https://chemicalindependence.com/chemical/624-83-9/ EPA TSCA Inventory: CAS 624-83-9. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 292910 for CAS 624-83-9. Reporting year: 2024. https://usatrade.census.gov/