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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.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China3.7%+35.0%38.7%
🇲🇽Mexico3.7%+10.0%13.7%
🇨🇦Canada3.7%+10.0%13.7%
🇩🇪Germany3.7%+10.0%13.7%
🇯🇵Japan3.7%+10.0%13.7%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

2931Lower: 13.7% vs 38.7%

If arsenic or other nonmetal added

Organo-inorganic with nonmetals/metal links go to 2931.

3811.90.00.00Higher: 41.5% vs 38.7%

If flame retardant additive mixture

Antiknock/flame prep mixtures in Chapter 38.

2901.10Lower: 10% vs 38.7%

If crude distillate form

Saturated acyclic hydrocarbons if purity fails.

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Import Tips & Compliance

• Document stabilizer as necessary for preservation (<1%) to qualify under note 2(f)

• Include flash point data (18°C); Class 3 flammable liquid declaration required

• Avoid anti-dusting agents that imply specific use per note 2(g)

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.

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.

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.

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.