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IMPCH (O-Isopropyl Methylphosphonochloridate) Technical Grade

Technical grade IMPCH (CAS 14484-64-1), a phosphonyl chloride intermediate for GB nerve agent synthesis and pesticide production. HTS 2931.59.0020 specifically names this compound as a halogenated organo-phosphorus derivative with direct carbon-phosphorus bonding. Distilled under vacuum, stabilized with hexyltriphenylphosphonium bromide.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China3.7%+12.5%16.2%
🇲🇽Mexico3.7%+10.0%13.7%
🇨🇦Canada3.7%+10.0%13.7%
🇩🇪GermanyFree+10.0%10%
🇯🇵JapanFree+12.5%12.5%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

2931.90.60.00Higher: 44% vs 16.2%

If contains >5% stereoisomers or diastereomers

Mixtures of geometric isomers classified as 'other' rather than specific compound

2809.20.00Higher: 37.5% vs 16.2%

If for bulk phosphoric acid chlorides without organic substitution

Inorganic phosphorus oxyhalides lack P-C bond, classified in Chapter 28

2919.90Same rate: 16.2%

If hydrolyzed to phosphonic acid before import

Phosphonic acids classified by carboxylic acid function in heading 2919

Not sure which classification is right?

The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.

Import Tips & Compliance

• Schedule 2B(12) under Chemical Weapons Convention; requires End-Use Certificate and BIS license

• Verify no prohibited downstream use; declare all synthesis pathways in import documentation

• Store below 5°C; provide thermal stability data to prevent decomposition during transit