1-Methylpyrazole
1-Methylpyrazole is a simple N-methyl substituted pyrazole, a heterocyclic compound with unfused pyrazole ring as its core structure. Classified under HTS 2933.19.90.00 as 'other' pyrazole compounds not specifically listed. Commonly used as a solvent and synthetic building block in organic chemistry.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing additional heteroatoms like oxygen
Pyrazole derivatives with oxygen functions classified later under 2933.99 per Chapter Note 3 (last in numerical order rule).
If sold primarily as temporary solvent without heterocyclic emphasis
Cyclic ethers/hydrocarbons sometimes misclassified, but pyrazole nitrogen hetero-atom dictates Chapter 29 classification.
If diluted >50% with hydrocarbon solvents for industrial blending
Mixtures prepared for specific formulations fall under prepared chemical mixtures rather than pure compounds.
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Import Tips & Compliance
• Label containers with flammability warnings (flash point 21°C) and include GHS pictograms per OSHA/DOT requirements
• Declare exact purity percentage (>98%) and water content to avoid reclassification as aqueous solution
Related Products under HTS 2933.19.90.00
3-Amino-1-phenylpyrazole
3-Amino-1-phenylpyrazole is a heterocyclic compound containing an unfused pyrazole ring with an amino group at position 3 and phenyl substituent at nitrogen 1. It falls under HTS 2933.19.90.00 as a pyrazole derivative not specifically enumerated elsewhere in the subheading. Used primarily as an intermediate in pharmaceutical and agrochemical synthesis.
4-Nitro-1H-pyrazole
4-Nitro-1H-pyrazole contains an unfused pyrazole ring with nitro group substitution at position 4, qualifying as a nitrogen-heterocyclic compound under heading 2933. Classified in 2933.19.90.00 as 'other' pyrazole derivative. Used in synthesis of explosives, pharmaceuticals, and energetic materials.
3,5-Dimethylpyrazole
3,5-Dimethylpyrazole features methyl groups at positions 3 and 5 of the unfused pyrazole ring, fitting HTS 2933.19.90.00 as an 'other' pyrazole compound. Primarily used as a nitrification inhibitor in agricultural fertilizers and as a ligand in coordination chemistry.
4-Aminoantipyrine
4-Aminoantipyrine (4-amino-1,5-dimethyl-2-phenyl-1,2-dihydro-3H-pyrazol-3-one) contains unfused pyrazolone ring structure, classified HTS 2933.19.90.00 as other pyrazole compound. Widely used as analytical reagent for phenol detection and cholesterol determination in clinical labs.
Ceftriaxone Sodium Impurity A (Pyrazole Intermediate)
Ceftriaxone Sodium Impurity A is a pyrazole-containing synthetic intermediate used in cephalosporin antibiotic production, classified under HTS 2933.19.90.00 as other unfused pyrazole compound. Meets Chapter 29 definition for separate chemically defined organic compounds.
Pyrazolone Red Dye Intermediate
Pyrazolone Red Dye Intermediate is a substituted pyrazole compound used in azo dye coupling reactions for textile and ink applications. Classified HTS 2933.19.90.00 as unfused pyrazole 'other' per Chapter Note excluding only retail coloring matter.