U.S. imports of Heterocyclic Compounds with Unfused Pyrazole Ring (NESOI) (HS 293319) totaled $52.7M in August 2026, imported from 20 countries.
Importers of Heterocyclic Compounds with Unfused Pyrazole Ring (NESOI) paid $3.8M in duties in August 2026, an average duty rate of 12.38% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 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.
134 import shipments a month
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.
Subheading 5 of 27 in heading 2933
Subheading 293319 · $52.7M of $493.3M
ImportsExports
Imports
$52.7MYoY · free account
Exports
$1.6MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $534.8M of Heterocyclic Compounds with Unfused Pyrazole Ring (NESOI) and exported $41.6M.
Through August 2026. Source: U.S. Census Bureau.
Trade Directory
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2933192300 | Arom or Mod Arom Pesticides Cont An Unfused Py Etc | $28.3M | 12.93% | 97.73% | $3.7M |
| 2933199000 | Other Cmpds Etc Cont An Unfused Pyrazole Ring Etc | $1.4M | 4.49% | 53.86% | $63K |
| 2933193700 | Arom or Mod Arom Cmpds of Prod in US Nt3 Sc6 Etc | $760K | 7.40% | 17.62% | $56K |
| 2933194300 | Arom or Mod Arom Cmpd Exc Prod in U.S. Nt3 Sc6 Etc | $73K | 19.83% | 100.00% | $14K |
| 2933193500 | Aromatic or Mod Arom Drugs Cont An Unfused Pyr Etc | $67K | 2.55% | 39.28% | $2K |
| 2933194500 | Drugs (Exc Arom or Mod Arom) Cont An Unfusd Py Etc | $60K | 3.70% | 100.00% | $2K |
| 2933190400 | Aminoethylphenylpyrazole; Etc | — | -- | -- | -- |
| 2933193095 | Photographic Chemicals, Arom./Modified Arom. NESOI | — | -- | -- | -- |
| 2933191500 | 1,2-Dimethyl-3,5-Diphenyl-1h-Pyraslium Methyl Sulf | — | -- | -- | -- |
| 2933190800 | 3-(5-Amino-3-Methyl-1h-Pyrazol-1-Yl) Benzenesulfon | — | -- | -- | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2933194350 | Arom or Mod Arom Cont An Unfused Pyrazole Rg Etc | $1.5M |
| 2933199050 | Compounds Cont An Unfused Pyrazole Rng Etc, NESOI | $75K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Imports · August 2026
origin
Switzerland and India together supply 78% of it.
customs district
destination
entry
rate provision · imports
2.5% enters free of duty; duty collected equals 12.38% of imports for consumption.