Methylphosphonic Dichloride
Methylphosphonic dichloride (CH3P(O)Cl2) contains phosphorus bonded solely to one methyl group and two chlorine atoms, fitting HTS 2930.90.9225's criteria for phosphorus compounds with specified alkyl groups. This reactive intermediate is used in organophosphorus synthesis. No other carbon atoms are present in the core structure.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing different alkyl groups beyond methyl/ethyl/n-propyl/isopropyl
Heading 2930.90.9100 covers other organo-sulfur/phosphorus compounds without the specific alkyl restriction.
If classified by halogen content rather than organic function
Inorganic acid halides take precedence under Chapter 28 note 2 exclusions if organic character is secondary.
If for bulk industrial intermediates without purity specification
Acyclic hydrocarbons with phosphorus may shift if primary function is hydrocarbon per chapter hierarchy.
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Import Tips & Compliance
• Ship with stabilizer as required by chapter note (e); unstabilized forms pose safety risks during transport
• Include reaction pathway documentation showing derivation from methylphosphonic acid to confirm heading placement
• Verify no solvent content exceeds transport safety limits per chapter note (e) to avoid reclassification
Related Products under HTS 2930.90.92.25
Dimethyl Methylphosphonate (DMMP)
Dimethyl methylphosphonate is an organophosphorus compound with the formula CH3P(O)(OCH3)2, containing a phosphorus atom bonded to one methyl group and two methoxy groups with no other carbon atoms directly attached to phosphorus. It falls under HTS 2930.90.9225 as it precisely matches the chemical structure specified for phosphorus compounds with one methyl group. Commonly used as a flame retardant and chemical intermediate.
Ethyl Methylphosphonic Acid (EMPA)
Ethyl methylphosphonic acid (CH3P(O)(OH)(OC2H5)) is a hydrolysis product of nerve agents, featuring phosphorus bonded to one methyl group and one ethyl group with no additional carbon atoms. Classified under HTS 2930.90.9225 due to its specific phosphorus substitution pattern matching the heading description. Used in chemical analysis and degradation studies.
Isopropyl Methylphosphonic Acid
Isopropyl methylphosphonic acid features phosphorus bonded to one methyl and one isopropyl group, precisely matching HTS 2930.90.9225's structural requirement. Used as a metabolite marker in pesticide and chemical weapons monitoring. The limited carbon attachment ensures chapter 29 classification.
n-Propyl Methylphosphonate
This compound has phosphorus attached to one methyl group and one n-propyl group, fitting HTS 2930.90.9225's narrow definition. Serves as a specialty solvent and reaction intermediate in pharmaceutical synthesis. Structure confirmed by P-NMR spectroscopy.