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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing added stabilizers or anti-dusting agents
Additions for safety or transport may shift to other organo-inorganic compounds per Chapter 29 note (f) and (g).
If imported as part of pesticide formulations
Pesticides and herbicides are excluded from Chapter 29 and classified in Chapter 38 based on end use.
If primarily saturated monohydric acyclic alcohols impurity present
Mixtures not fitting pure compound definition may fall under earlier halogenated/sulfonated derivatives if applicable.
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Import Tips & Compliance
• Verify purity certificate and chemical analysis to confirm classification under 2931.44; ensure SDS and proper UN packaging for Hazard Class 8 corrosive material
• Avoid misclassification as pesticide formulations which fall outside Chapter 29
Related Products under HTS 2931.44.00.00
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.
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.