Dimethyl Phosphite Reagent Grade
Reagent-grade dimethyl phosphite meeting ACS specifications for laboratory use. As a separate chemically defined organic compound, it is classified under tariff item 2920.21.00 per Chapter 29 Note 1(a). It is ideal for research and development in phosphonate chemistry.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is not exclusively dimethyl phosphite
Other phosphite esters are classified under a different tariff item.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Include the purity grade and lot number on the commercial invoice
• Be aware that reagent-grade chemicals may require additional documentation for end-use verification
Related Products under Tariff item 2920.21.00
Dimethyl Phosphite (DMP)
Dimethyl phosphite (DMP), a colorless liquid organophosphorus compound with the formula (CH3O)2P(O)H. It is a separate chemically defined organic compound classified under tariff item 2920.21.00 as a phosphite ester of an inorganic acid of a non-metal. It serves as a key intermediate in the production of pesticides, flame retardants, and other chemicals.
Dimethyl Phosphite in Aqueous Solution 50%
Dimethyl phosphite in aqueous solution at 50% concentration, prepared for safe transport. This solution falls under tariff item 2920.21.00 as a product of a separate chemically defined organic compound dissolved in water, per Chapter 29 Note 1(d). It is used in corrosion inhibitors and other industrial applications.
Dimethyl Phosphite with Stabilizer
Dimethyl phosphite stabilized with BHT (butylated hydroxytoluene) for transport stability. Chapter 29 Note 1(f) permits added stabilizers necessary for preservation or transport without changing classification. This product falls under tariff item 2920.21.00 and is used in herbicide production and other applications.
Distilled Dimethyl Phosphite 99%
High-purity distilled dimethyl phosphite with 99% assay, used as an intermediate in pesticide production. As a separate chemically defined organic compound with the formula (CH3O)2P(O)H, it is classified under tariff item 2920.21.00 per Chapter 29 Note 1(a).
High Assay Dimethyl Phosphite 99.5%
Ultra-high purity dimethyl phosphite at 99.5% for pharmaceutical intermediates. This separate chemically defined organic compound is classified under tariff item 2920.21.00 as a phosphite ester. Its high purity supports sensitive chemical reactions in pharmaceutical synthesis.
Industrial Grade Dimethyl Phosphite
Industrial-grade dimethyl phosphite with 97-98% purity, used in manufacturing water treatment agents and as a reducing agent. It is classified under tariff item 2920.21.00 as a pure phosphite ester, meeting the criteria for a separate chemically defined organic compound.