Trimethylolpropane (TMP) Technical Grade
Trimethylolpropane (TMP), chemically 2-Ethyl-2-(hydroxymethyl)propane-1,3-diol, is a triol used as a building block in polyurethane and alkyd resin production. It falls under HTS 2905.41.00.00 as a separate chemically defined acyclic polyhydric alcohol. This technical grade product is supplied at 97-99% purity for industrial synthesis.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If blended with stabilizers exceeding chapter note limits
Blends with additives for specific uses beyond safety/transport fall under mixtures of chemicals in Chapter 38.
If esterified with polybasic acids
Esters of polyhydric alcohols like TMP with carboxylic acids are classified under the later heading 2915 per chapter note 4(A).
If pre-polymerized into resins
Polymerized forms of TMP derivatives become polyether polyols classified in Chapter 39 as plastics.
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Import Tips & Compliance
• Verify purity certificate to confirm classification as chemically defined compound; ensure SDS includes exact chemical name for customs
• Avoid misclassification as mixtures by providing assay data
• Use proper UN packaging for transport as it's a flammable liquid
Related Products under HTS 2905.41.00.00
High Purity Trimethylolpropane (TMP) 99.5%
High purity TMP (2-Ethyl-2-(hydroxymethyl)propane-1,3-diol) at 99.5% is used in radiation-curable coatings and adhesives. Classified under HTS 2905.41.00.00 as a pure acyclic polyhydric alcohol per chapter notes. Supplied as white crystalline flakes or molten.
Trimethylolpropane Stabilized with 0.1% BHT
TMP stabilized with 0.1% butylated hydroxytoluene (BHT) for preservation during storage and transport. Allowed under HTS 2905.41.00.00 per chapter note 1(f) as stabilizer necessary for preservation. Used in alkyd paint production.
Molten Trimethylolpropane (TMP)
TMP supplied in heated tankers as molten liquid at 80-100°C for direct industrial feed. Remains under HTS 2905.41.00.00 as the same chemically defined compound in transport form. Primary use in flexible polyurethane foams.
Trimethylolpropane Flakes 98% Purity
Crystalline TMP flakes at 98% purity, packaged in 25kg bags for resin manufacturing. Classified HTS 2905.41.00.00 as the named acyclic polyhydric alcohol despite minor impurities. Key intermediate for saturated polyesters.
TMP with Anti-Dusting Agent
Powdered TMP treated with 0.05% silica anti-dusting agent for safe handling. Permitted under HTS 2905.41.00.00 by chapter note 1(g) for identification/safety without specific use adaptation. Used in powder coatings.
Distilled Trimethylolpropane USP Grade
Ultra-pure distilled TMP meeting USP standards for pharmaceutical intermediates. HTS 2905.41.00.00 applies to this chemically defined polyhydric alcohol. Used in drug synthesis and cosmetics.