Technical Grade Methylphosphonic Acid
Technical grade methylphosphonic acid is a white crystalline powder used in industrial chemical processes, precisely matching HTS 2931.44.00.00 for non-halogenated organo-phosphorus derivatives. It functions as a precursor for phosphonate-based water treatment chemicals.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If organo-arsenic or other metal compounds mixed
Organo-inorganic compounds with additional nonmetals/metals link to carbon go to other 2931 subheadings.
If prepared as chemical mixtures for specific industrial use
Complex mixtures not purely chemically defined fall under Chapter 38 prepared binders or chemicals.
If ether-function or alcohol derivative form
Derivatives with oxygen functions shift to later headings per Chapter 29 classification notes.
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
• Include detailed chemical composition report to distinguish from pesticide intermediates; use DOT-approved corrosive packaging
• Watch for reclassification if diluted beyond Chapter 29 note (d) limits
Related Products under HTS 2931.44.00.00
Methylphosphonic Acid (99% Purity)
Methylphosphonic acid is a non-halogenated organo-phosphorus compound with the formula CH3P(O)(OH)2, classified under HTS 2931.44.00.00 as a separate chemically defined organic compound containing phosphorus directly linked to carbon. It serves as a key intermediate in synthesizing flame retardants and herbicides.
Methylphosphonic Acid Aqueous Solution (50%)
A 50% aqueous solution of methylphosphonic acid qualifies under HTS 2931.44.00.00 per Chapter 29 note (d) for products of this heading dissolved in water. It is used in metal surface treatment and as a catalyst intermediate.
High Purity Methylphosphonic Acid for Synthesis
Ultra-high purity methylphosphonic acid (99.9%) for laboratory and pharmaceutical synthesis, classified under HTS 2931.44.00.00 as a separate chemically defined organo-inorganic compound. Essential precursor for advanced phosphonate drugs and ligands.
Stabilized Methylphosphonic Acid Flakes
Methylphosphonic acid flakes with minimal stabilizer for safe transport, falling under HTS 2931.44.00.00 per Chapter 29 note (f) allowing added stabilizers. Used in polymer flame retardant production.