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HSChapter 29
U.S. imports of methylphosphonic dichloride (HS 293151) totaled $70K in April 2026, traded with 1 country.
Importers of Methylphosphonic Dichloride paid $10K in duties in April 2026 — an effective duty rate of 14% on $70K in dutiable value, based on actual customs collections rather than the published tariff schedule. Methylphosphonic Dichloride imports of $70K in April 2026 ran 300% above the year-to-date monthly average of $17K.
Last updated: April 2026 dataMethylphosphonic dichloride is a halogenated organophosphorous intermediate classified under a single 10-digit line (2931510000) and is a recognized Chemical Weapons Convention Schedule 2 precursor, placing it under strict international monitoring and US import controls. China is the sole recorded US supplier, creating significant concentration risk for buyers who depend on this intermediate for downstream synthesis. Importers should confirm Commerce Department and State Department licensing requirements before arranging shipment, as CWC-related controls can affect admissibility regardless of declared end use.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
As a CWC Schedule 2 chemical, methylphosphonic dichloride is subject to Commerce Department Export Administration Regulations (EAR) controls on import and export, and transactions may require end-use certification. Importers should consult a licensed customs broker and verify current BIS requirements before shipment.
Methylphosphonic dichloride serves as a key intermediate in the synthesis of flame retardants, specialty phosphonate esters, and certain agrochemical compounds. Its reactivity with alcohols and amines makes it a versatile building block, though its dual-use nature means buyers typically must document legitimate end-use applications.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2931510000 | METHYLPHOSPHONIC DICHLORIDE | $70K | 13.70% | $10K |
METHYLPHOSPHONIC DICHLORIDE
NUCLEIC ACIDS & SALTS; OTHER HETEROCYCLIC CMP, NES
HS 293499
HETEROCYCLIC COMP W NITROGEN HETERO-ATM ONLY NESOI
HS 293399
POLYPEPTIDE PROTEIN& GLYCOPROTEIN HORMONES &DERIV
HS 293719
CMPDS CONT AN UNFUSED PYRIDINE RING ETC NESOI
HS 293339
COMP WITH PYRIMIDINE OR PIPERAZINE RING, NESOI
HS 293359
ANTIBIOTICS, NESOI
HS 294190
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LONG BEACH, CA | $70K | -- | -$70K |