Tripropyl Phosphorothioate Flame Retardant Intermediate
A high-purity grade of 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane 2,4,6-trioxide used specifically as an intermediate in synthesizing phosphorus-based flame retardants for plastics. Classified under HTS 2931.46.00.00 due to its precise organo-phosphorus cyclic structure without halogens. Supplied as white crystalline powder for industrial chemical processing.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for simpler trialkyl phosphites without the complex trioxatriphosphinane ring
Less complex organo-phosphorus compounds like PO(OR)3 structures fall earlier in 2931; the specific cyclic structure dictates 2931.46 placement.
If containing alcohol functions making it classifiable as monocarboxylic acid derivative
Chapter notes require oxygen-function compounds to classify later; pure organo-inorganic phosphorus takes precedence over any minor functional groups.
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 detailed end-use statement specifying flame retardant synthesis to support classification and avoid reclassification as finished additive
• Confirm batch testing for phosphorus content >40% to distinguish from generic organophosphorus mixtures
• Register under TSCA Premanufacture Notification if annual import volume exceeds 10,000 lbs
Related Products under HTS 2931.46.00.00
2,4,6-Tripropyl-1,3,5,2,4,6-trioxatriphosphinane 2,4,6-trioxide
This is a specific non-halogenated organo-phosphorus compound featuring a trioxatriphosphinane ring structure with propyl groups attached to phosphorus atoms. It falls under HTS 2931.46.00.00 as a distinct organo-inorganic compound in the category of non-halogenated organo-phosphorus derivatives. Primarily used as a chemical intermediate in organic synthesis and flame retardant production.
Cyclic Tripropyl Phosphonite Oxide Catalyst Precursor
Specialty chemical grade 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane 2,4,6-trioxide serving as precursor for phosphinite-based catalysts in hydroformylation processes. Falls squarely under HTS 2931.46.00.00 as a non-halogenated organo-phosphorus derivative with defined trioxatriphosphinane structure. Typically packaged in 25kg fiber drums for chemical manufacturers.
Tripropyl Trioxatriphosphinane Polymer Stabilizer
Technical grade 2,4,6-tripropyl-1,3,5,2,4,6-trioxatriphosphinane 2,4,6-trioxide used in polymerization stabilization for engineering plastics production. This organo-inorganic compound is specifically named in HTS 2931.46.00.00 due to its unique caged phosphorus structure. Imported as stabilized solution in inert solvent per Chapter Note 1(e).