O-Ethyl Methyl Phosphonofluoridate (EMPF)
A halogenated organo-phosphorus compound with an ethyl group and methyl substituent on the phosphorus atom bonded to fluoride. It falls under HTS 2931.59.0010 as an O-alkyl (C2) alkyl (methyl) phosphonofluoridate, matching the chemical structure defined in the heading for other halogenated organo-phosphorous derivatives. These are separate chemically defined organic compounds per Chapter 29 note (a).
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing arsenic instead of phosphorus
Organo-arsenic compounds fall under other organo-inorganic compounds excluding phosphorous derivatives.
If sold as a mixture with sulfur compounds
Organo-sulfur compounds take precedence per Chapter 29 note on classification in last numerical heading.
If imported as a dilute aqueous solution for safety transport
Chapter 28 covers other inorganic compounds including diluted organo-halides not qualifying under Chapter 29 note (d).
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
• Require end-user certificates and verify compliance with Chemical Weapons Convention (CWC) schedules; ensure SDS documentation specifies exact chemical purity
• Common pitfall: misclassification as pesticide intermediate without fluoride confirmation
• Consult CBP for Schedule 1 chemical import permits
Related Products under HTS 2931.59.00.10
O-Isopropyl Methylphosphonofluoridate (IMPF)
This compound features an isopropyl O-alkyl group (≤C10) and methyl alkyl on phosphorus with a fluoride, classified under HTS 2931.59.0010 for O-alkyl alkyl phosphonofluoridates. As a chemically defined organo-inorganic phosphorus derivative with halogen, it fits Chapter 29's scope for separate organic compounds.
O-n-Propyl Ethylphosphonofluoridate
A specific phosphonofluoridate with n-propyl (C3) O-alkyl and ethyl alkyl groups, directly matching HTS 2931.59.0010's description for halogenated organo-phosphorous derivatives. It qualifies as a separate chemically defined compound under Chapter 29, excluding mixtures or non-pure forms.
O-Cyclohexyl Methylphosphonofluoridate
Features a cyclohexyl cycloalkyl (C6 ≤C10) O-group, methyl alkyl, and fluoride on phosphorus, fitting HTS 2931.59.0010 for O-alkyl (including cycloalkyl) alkyl phosphonofluoridates. This pure, chemically defined compound adheres to Chapter 29 notes excluding solvents or additives.
O-Methyl n-Propylphosphonofluoridate
This derivative has methyl O-alkyl (C1 ≤C10), n-propyl alkyl, and fluoridate group, precisely under HTS 2931.59.0010 as other halogenated organo-phosphorous compounds. It meets Chapter 29's criteria for separate organic compounds without disqualifying mixtures.