Pharma-Grade Tetramethylguanidine Base
Pharmaceutical-grade tetramethylguanidine meeting USP standards, under HTS 2925.29.70.00 as imine derivative. Chemically defined for drug synthesis intermediates. Excludes immunological products per chapter note.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If immunological product
Immunological products excluded to heading 3002 per chapter note (e).
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
• Obtain FDA import alert clearance if for drug manufacture
• Certify GMP compliance in COA for pharma use
• Distinguish from finished APIs which may go to Chapter 30
Related Products under HTS 2925.29.70.00
Tetramethylguanidine (TMG)
Tetramethylguanidine is a strong organic base classified under HTS 2925.29.70.00 as an imine-function compound and derivative. It features a guanidine structure with four methyl groups, making it a chemically defined compound fitting Chapter 29 note (a). Primarily used as a catalyst in chemical synthesis.
99% Pure Tetramethylguanidine
High-purity tetramethylguanidine (99%) used in pharmaceutical intermediate synthesis, classified under HTS 2925.29.70.00 as a separate chemically defined imine derivative. Meets Chapter 29 requirements for organic compounds without excluded additives. Common in organic catalysis applications.
Industrial Grade Tetramethylguanidine
Tetramethylguanidine in industrial grade (95-98% purity) for use as catalyst in polymerization reactions, under HTS 2925.29.70.00. Qualifies as chemically defined organic imine per Chapter 29 scope, with minor impurities allowed. Key in polyurethane production.
Tetramethylguanidine with Stabilizer
Stabilized tetramethylguanidine containing BHT preservative for transport, classified HTS 2925.29.70.00 per Chapter 29 note (f). Remains chemically defined imine compound. Used in fine chemical manufacturing.