Dimethyl phosphite
Esters of other inorganic acids of nonmetals (excluding esters of hydrogen halides) and their salts; their halogenated, sulfonated, nitrated or nitrosated derivatives: > Phosphite esters and their salts; their halogenated, sulfonated, nitrated or nitrosated derivatives: > Dimethyl phosphite
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 2920.21.00.00
Dimethyl Phosphite (DMP)
Dimethyl phosphite is a colorless liquid organophosphorus compound with the formula (CH3O)2P(O)H, classified under HTS 2920.21.00.00 as a phosphite ester of an inorganic acid of nonmetal (phosphorous acid). It serves as a key reagent in organic synthesis for producing phosphonate esters and flame retardants.
Distilled Dimethyl Phosphite 99%
High-purity distilled dimethyl phosphite (99% assay) is a phosphite ester used in pesticide intermediate production, falling under HTS 2920.21.00.00 due to its chemical definition as (CH3O)2P(O)H. It meets chapter note (a) for separate chemically defined organic compounds.
Industrial Grade Dimethyl Phosphite
Industrial dimethyl phosphite, typically 97-98% pure, is employed in manufacturing water treatment agents and as a reducing agent, classified in HTS 2920.21.00.00 as a pure phosphite ester. Its structure qualifies under chapter provisions for esters of inorganic nonmetal acids.
Dimethyl Phosphite with Stabilizer
Dimethyl phosphite stabilized with BHT for transport stability is a phosphite ester under HTS 2920.21.00.00, as chapter note (f) allows stabilizers necessary for preservation without changing classification. Used in herbicide synthesis.
Technical Dimethyl Phosphite for Flame Retardants
Technical grade dimethyl phosphite designed for flame retardant production is classified as a pure phosphite ester in HTS 2920.21.00.00 per chapter note (a). It reacts to form phosphorus-containing polymers.
High Assay Dimethyl Phosphite 99.5%
Ultra-high purity 99.5% dimethyl phosphite for pharmaceutical intermediates falls under HTS 2920.21.00.00 as a chemically defined phosphite ester. Its precision purity supports sensitive reactions.
Dimethyl Phosphite in Aqueous Solution 50%
50% dimethyl phosphite in water, prepared for safe transport, remains under HTS 2920.21.00.00 per chapter note (d) for products of note (a) dissolved in water. Used in corrosion inhibitors.
Purified Dimethyl Phosphite for Pesticides
Purified dimethyl phosphite for glyphosate synthesis is a phosphite ester classified in HTS 2920.21.00.00, meeting criteria for separate organic compounds. Essential in agrochemical production.
Stabilized Dimethyl Phosphite Bulk
Bulk stabilized dimethyl phosphite with anti-caking agent for industrial handling qualifies under HTS 2920.21.00.00 via chapter note (f). Applied in polymer additives.
Dimethyl Phosphite Reagent Grade
Reagent-grade dimethyl phosphite (ACS spec) for laboratory use is classified as a phosphite ester in HTS 2920.21.00.00 under chapter note (a). Ideal for R&D in phosphonate chemistry.