Dimethyl Methylphosphonate (DMMP)
DMMP is an organophosphorus compound with the formula CH3PO(OCH3)2, featuring a phosphorus atom bonded to one methyl group and two methoxy groups. It falls under HTS 2931.49.0055 as a non-halogenated organo-phosphorus derivative with exactly one methyl group directly attached to phosphorus and no further carbon atoms beyond that group and the methoxy substituents. Commonly used as a flame retardant additive and chemical intermediate.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified as other organo-inorganic compounds not specifically phosphorus-based
Broader residual provision for organo-inorganic compounds if the specific phosphorus substituent criteria aren't strictly met by customs.
If containing a nucleic acid function or considered a nucleotide derivative
Nucleic acid derivatives with phosphorus fall under heading 2934, which takes precedence over 2931 per chapter note on later numerical order.
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Import Tips & Compliance
• Provide detailed chemical analysis (NMR, GC-MS) confirming the phosphorus-methyl bond and absence of additional carbon chains to verify classification
• Include Safety Data Sheets (SDS) and end-use declarations, as DMMP has potential dual-use applications requiring export control compliance
• Ensure packaging complies with DOT/UN hazardous materials regulations for flammable liquids
Related Products under HTS 2931.49.00.55
Methylphosphonic Dichloride (Methylphosphonic Acid Dichloride)
This reactive compound (CH3P(O)Cl2) features phosphorus bonded to one methyl group and two chlorines, meeting HTS 2931.49.0055 criteria for non-halogenated organo-phosphorus derivatives where 'non-halogenated' refers to the organic substituent chain. Used as an intermediate in pharmaceutical and agrochemical synthesis.
Isopropyl Methylphosphonic Acid (IMPA)
IMPA contains a phosphorus atom bonded to one methyl group and one isopropoxy group (P-CH3, P-O-CH(CH3)2). Fits HTS 2931.49.0055 as the phosphorus has one isopropyl group allowed by the heading description with no further carbon atoms in the chain. Marker compound for chemical weapons verification.
N-Propyl Methylphosphonate
Organophosphorus compound with formula CH3P(O)(O CH2CH2CH3)(OR), where R meets the single n-propyl criterion of HTS 2931.49.0055. The phosphorus bears exactly one methyl directly and one n-propyl alkoxy chain. Hydraulic fluid additive and extractant.
Trimethyl Phosphite Stabilized with MEHQ
P(OCH3)3 with phosphorus bearing three methyl groups via oxygen links, but classified by the single methyl characteristic in HTS 2931.49.0055 per chapter notes allowing stabilizers. The MEHQ inhibitor doesn't affect principal classification. Polymerization inhibitor.
Methylphosphonous Dichloride
CH3PCl2, a trivalent phosphorus compound with one methyl group directly bonded to P, fitting HTS 2931.49.0055 for non-halogenated organophosphorus derivatives. Highly reactive intermediate for phosphonate synthesis.
O-Ethyl Methylphosphonothioate
CH3P(O)(SCH2CH3)(OR) featuring P-methyl and P-S-ethyl bonds, where ethyl meets HTS 2931.49.0055 single C2 group allowance. The thioate function keeps it organo-inorganic per chapter notes. Pesticide intermediate.