Metamizole Sodium API
Metamizole sodium (dipyrone) contains pyrazole ring as analgesic/antipyretic active ingredient. Classifies under HTS 2933.19.4500 as pyrazole drug despite sodium salt form per Chapter note 5(C). Used globally for pain relief.
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Import Tips & Compliance
• Note US import restrictions; provide safety data despite FDA non-approval status
• CoA must confirm sodium 1-phenyl-2,3-dimethyl-5-pyrazolone identity and sulfonate purity
• Salt form stays with parent pyrazole per note 5(C)(1); avoid separate inorganic classification
Related Products under HTS 2933.19.45.00
Celecoxib API
Celecoxib is a selective COX-2 inhibitor used as the active pharmaceutical ingredient in anti-inflammatory drugs like Celebrex for treating arthritis. It contains an unfused pyrazole ring in its heterocyclic structure, qualifying it under HTS 2933.19.4500 as a pyrazole-based drug. This classification applies to pure chemical compounds intended for pharmaceutical use.
Rizatriptan Benzoate API
Rizatriptan benzoate is the active ingredient in Maxalt for migraine treatment, featuring a pyrazole ring in its structure. Classified under HTS 2933.19.4500 as a drug containing unfused pyrazole ring per Chapter 29 notes. Used primarily as a serotonin receptor agonist in pharmaceutical manufacturing.
Fomepizole API
Fomepizole is an antidote for ethylene glycol/methanol poisoning, featuring a simple 4-methylpyrazole structure. Classified under HTS 2933.19.4500 as a pyrazole ring drug for emergency medical use. Provided as sterile injectable-grade API.
Aminaphtone API
Aminaphtone is a pyrazole derivative used for capillary fragility treatment in vascular disorders. Features 4-amino-3-methyl-1-phenylpyrazol-5-one structure qualifying under HTS 2933.19.4500. Pharmaceutical grade for tablet manufacturing.
Sildenafil Citrate API
Sildenafil citrate, the active ingredient in Viagra, contains a pyrazole ring within its heterocyclic structure for erectile dysfunction treatment. Falls under HTS 2933.19.4500 as a pyrazole-containing drug per Chapter 29 chemical classification rules. Supplied as bulk powder for tablet formulation.
Zaleplon API
Zaleplon, active in Sonata sleep aid, contains pyrazole ring as core structure for non-benzodiazepine hypnotic action. HTS 2933.19.4500 classification for unfused pyrazole drugs. Bulk API for capsule production.