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HSChapter 29
U.S. imports of heterocyclic compounds with unfused pyrazole ring (nesoi) (HS 293319) totaled $42.1M in April 2026, traded with 18 countries.
Importers of Heterocyclic Compounds with Unfused Pyrazole Ring (NESOI) paid $2.9M in duties in April 2026 — an effective duty rate of 9.3% on $31.1M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataCompounds containing an unfused pyrazole ring — excluding phenazone and its derivatives — cover a commercially diverse set of intermediates used in agrochemicals, pharmaceuticals, photographic chemicals, and specialty materials. The US schedule is highly granular, with dedicated lines for specific named compounds, aromatic pesticides, aromatic drugs, photographic chemicals (2933193095), and multiple NESOI tiers differentiated by aromatic character and US Note 3 Section VI status. Switzerland and Germany lead US import supply, consistent with their dominant roles in innovator pharmaceutical and agrochemical synthesis, while India and China supply higher-volume generic and intermediate-grade material. The breadth of this heading means that structural analysis — particularly confirming whether the pyrazole ring is fused or unfused and whether the compound is aromatic — is essential before classification.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Heading 293311 is reserved exclusively for phenazone (antipyrine) and its structural derivatives. Any other compound containing an unfused pyrazole ring that is not a phenazone derivative falls under 293319. The key test is whether the compound's pyrazole ring bears the specific substitution pattern that defines the phenazone series; if not, 293319 applies, and the importer must then determine the correct 10-digit line based on end-use and aromatic character.
Importers should provide a structural formula or IUPAC name, a certificate of analysis confirming purity and identity, and a statement of intended end-use (pesticide active ingredient or intermediate). If the compound appears on the US Note 3 Section VI list, documentation supporting that designation should be included. CBP may request additional technical data if the aromatic character or end-use is not clear from the commercial invoice.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| SWITZERLAND | $20.7M | -- | -$20.7M |
| GERMANY | $14.2M | $1.2M | -$13.1M |
| ITALY | $1.7M | -- | -$1.7M |
| JAPAN | $1.7M | -- | -$1.7M |
| UNITED KINGDOM | $1.5M | -- | -$1.5M |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2933192300 | AROM OR MOD AROM PESTICIDES CONT AN UNFUSED PY ETC | $35.9M | 9.35% | $2.7M |
| 2933193500 | AROMATIC OR MOD AROM DRUGS CONT AN UNFUSED PYR ETC | $2.8M | 6.50% | $98K |
| 2933199000 | OTHER CMPDS ETC CONT AN UNFUSED PYRAZOLE RING ETC | $1.5M | 8.61% | $45K |
| 2933193700 | AROM OR MOD AROM CMPDS OF PROD IN US NT3 SC6 ETC | $1.4M | 34.34% | $17K |
| 2933194300 | AROM OR MOD AROM CMPD EXC PROD IN U.S. NT3 SC6 ETC | $216K | 31.51% | $2K |
| 2933193095 | PHOTOGRAPHIC CHEMICALS, AROM./MODIFIED AROM. NESOI | $147K | 16.50% | $24K |
| 2933194500 | DRUGS (EXC AROM OR MOD AROM) CONT AN UNFUSD PY ETC | $140K | 3.70% | $759 |
| 2933190800 | 3-(5-AMINO-3-METHYL-1H-PYRAZOL-1-YL) BENZENESULFON | $8K | -- | -- |
AROM OR MOD AROM PESTICIDES CONT AN UNFUSED PY ETC
AROMATIC OR MOD AROM DRUGS CONT AN UNFUSED PYR ETC
OTHER CMPDS ETC CONT AN UNFUSED PYRAZOLE RING ETC
AROM OR MOD AROM CMPDS OF PROD IN US NT3 SC6 ETC
AROM OR MOD AROM CMPD EXC PROD IN U.S. NT3 SC6 ETC
PHOTOGRAPHIC CHEMICALS, AROM./MODIFIED AROM. NESOI
DRUGS (EXC AROM OR MOD AROM) CONT AN UNFUSD PY ETC
3-(5-AMINO-3-METHYL-1H-PYRAZOL-1-YL) BENZENESULFON
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2933194350 | AROM OR MOD AROM CONT AN UNFUSED PYRAZOLE RG ETC | $1.3M |
| 2933199050 | COMPOUNDS CONT AN UNFUSED PYRAZOLE RNG ETC, NESOI | $39K |
AROM OR MOD AROM CONT AN UNFUSED PYRAZOLE RG ETC
7.1K kg
COMPOUNDS CONT AN UNFUSED PYRAZOLE RNG ETC, NESOI
1.1K kg
NUCLEIC ACIDS & SALTS; OTHER HETEROCYCLIC CMP, NES
HS 293499
HETEROCYCLIC COMP W NITROGEN HETERO-ATM ONLY NESOI
HS 293399
POLYPEPTIDE PROTEIN& GLYCOPROTEIN HORMONES &DERIV
HS 293719
CMPDS CONT AN UNFUSED PYRIDINE RING ETC NESOI
HS 293339
COMP WITH PYRIMIDINE OR PIPERAZINE RING, NESOI
HS 293359
ANTIBIOTICS, NESOI
HS 294190
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NORFOLK-NEWPORT NEWS, VA | $16.9M | -- | -$16.9M |
| OMAHA, NE | $7.7M | -- | -$7.7M |
| NEWARK, NJ | $5.2M | -- | -$5.2M |