99% Pure Trimethyl Phosphite
High-purity trimethyl phosphite (99%) used in fine chemical synthesis for agrochemicals and polymers. Falls under HTS 2920.23.00.00 as an ester of phosphorous acid without halogenation or other modifications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If sulfonated derivative present
Sulfonated organo-sulfur compounds classify under 2930 per chapter note on derivatives.
If supplied as phosphorous acid ester salt
Salts of inorganic acids may fall under Chapter 28 per note 2(C).
If pesticide-formulated
Herbicide/insecticide goods containing phosphite shift to Chapter 38.
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
• Provide GC-MS analysis confirming trimethyl phosphite content to avoid reclassification as mixture
• Label with GHS pictograms for flammable liquid and toxic hazards; ensure DOT-compliant shipping papers
• Check EU REACH compliance if transshipping, as phosphites require registration
Related Products under HTS 2920.23.00.00
Trimethyl Phosphite
Trimethyl phosphite is a colorless liquid organophosphorus compound with the formula P(OCH3)3, classified under HTS 2920.23.00.00 as a phosphite ester. It serves as a key reagent in organic synthesis for producing pesticides, flame retardants, and pharmaceutical intermediates.
Industrial Grade Trimethyl Phosphite
Industrial trimethyl phosphite for large-scale production of flame retardants and plasticizers. Classified in HTS 2920.23.00.00 as the specific phosphite ester meeting chapter purity criteria.
Stabilized Trimethyl Phosphite
Trimethyl phosphite with added stabilizer for safe transport, compliant with chapter note 2(f). Used in polymer additive synthesis under HTS 2920.23.00.00.
Distilled Trimethyl Phosphite 98%
Vacuum-distilled trimethyl phosphite at 98% purity for pharmaceutical phosphonate synthesis. HTS 2920.23.00.00 as chemically defined phosphite ester.
Technical Trimethyl Phosphite
Technical-grade trimethyl phosphite for pesticide manufacturing. Pure compound under HTS 2920.23.00.00, excluding formulated products.