Germany 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.
Trade Directory
List your company under HS 293145 — Salt of Methylphosphonic Acid with (Aminoiminomethyl)urea, so the companies trading it can find you. Be the first supplier listed.
Subheading 12 of 17 in heading 2931
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share |
|---|---|---|---|---|
| 2931450000 | Org-Phos Drvtv: Salt of Methylphosphonic Acid/Urea | — | -- | -- |
ImportsExports
Imports
—YoY · free account
Exports
—YoY · free account
Low of 2 reported months · imports
Low · free accountOver the twelve months to August 2026, the U.S. exported $310K of Salt of Methylphosphonic Acid with (Aminoiminomethyl)urea.
Fewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through August 2026 · imports 2 of 12 months reported, exports 8 of 12 months reported. Source: U.S. Census Bureau.
Imports · August 2026
origin
customs district
destination
entry
rate provision · imports
None recorded for this period.