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HSChapter 29
U.S. imports of salt of methylphosphonic acid with (aminoiminomethyl)urea (HS 293145) totaled $4K in May 2026, traded with 1 country.
Salt of Methylphosphonic Acid with (Aminoiminomethyl)urea imports of $4K in May 2026 ran 400% above the year-to-date monthly average of $869.
Last updated: May 2026 dataGermany is the dominant US supplier of this specialty organophosphorus salt, which enters under a single tariff line (2931450000). The compound — a salt formed between methylphosphonic acid and aminoguanidine (aminoiminomethyl urea) — is used in flame-retardant formulations and as an intermediate in fine chemical synthesis. Its narrow commercial application base means import volumes are relatively concentrated, and buyers should verify CAS identity carefully to avoid misclassification against structurally adjacent methylphosphonate salts.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
A supplier-provided certificate of analysis confirming the CAS number, the specific counterion (aminoiminomethyl urea / aminoguanidine), and the salt form is essential. This distinguishes the compound from free methylphosphonic acid and from other salts that fall into the broader 'NES' basket under heading 2931.
No Section 301 or antidumping measures are known to apply specifically to this compound from Germany. However, importers should confirm current tariff treatment with a licensed customs broker, as broader Section 301 list reviews can affect chemical subheadings.
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Monthly import values over time
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2931450000 | ORG-PHOS DRVTV: SALT OF METHYLPHOSPHONIC ACID/UREA | $0 |
ORG-PHOS DRVTV: SALT OF METHYLPHOSPHONIC ACID/UREA
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
| State | Imports | Exports | Balance |
|---|---|---|---|
| North Carolina | -- | -- | -- |
| South Carolina | -- | -- | -- |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| CHARLESTON, SC | -- | -- | -- |
| LAREDO, TX | -- | -- | -- |