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HSChapter 29
U.S. imports of polyphenols, not elsewhere specified or included (HS 290729) totaled $9.2M in April 2026, traded with 16 countries.
Importers of Polyphenols, Not Elsewhere Specified or Included paid $959K in duties in April 2026 — an effective duty rate of 11% on $9.0M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataTert-butylhydroquinone (TBHQ, 2907292500), 4,4'-biphenol (2907291500), pyrogallic acid (2907291000), and phenol-alcohols (2907290500) are among the commercially distinct compounds grouped in this residual polyphenol heading, each serving different industrial niches from food-grade antioxidants to liquid-crystal polymer monomers. France and India are the leading suppliers to the US market. The heading's breadth means that classification at the 10-digit level requires careful matching of chemical identity to the enumerated lines before defaulting to the NESOI basket (2907299000). Goods of Chinese origin are subject to Section 301 tariffs.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
TBHQ has its own dedicated 10-digit line, 2907292500, and should not be entered under the NESOI basket 2907299000. Importers should confirm the chemical identity with a certificate of analysis and cite the specific line on the entry to avoid classification disputes.
4,4'-Biphenol is a monomer used in the production of high-performance liquid-crystal polymers (LCPs) and specialty epoxy resins for electronics and aerospace applications. Its relatively niche demand profile means supply is concentrated among a small number of specialty chemical producers, making lead-time management a key procurement consideration.
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HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2907299000 | POLYPHENOLS, NESOI | $8.9M | 10.57% | $930K |
| 2907292500 | TERT-BUTYLHYDROQUINONE | $158K | 16.29% | $26K |
| 2907290500 | PHENOL-ALCOHOLS | $43K | -- | -- |
| 2907291000 | PYROGALLIC ACID | $23K | 11.30% | $3K |
| 2907291500 | 4,4'-BIPHENOL | $0 | -- | -- |
POLYPHENOLS, NESOI
TERT-BUTYLHYDROQUINONE
PHENOL-ALCOHOLS
PYROGALLIC ACID
4,4'-BIPHENOL
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2907299000 | POLYPHENOLS, NESOI | $3.4M |
| 2907292500 | TERT-BUTYLHYDROQUINONE | $90K |
| 2907290500 | PHENOL-ALCOHOLS | $52K |
| 2907291000 | PYROGALLIC ACID (1,2,3-TRIHYDROXYBENZENE) | $0 |
| 2907291500 | 4,4'-BIPHENOL | $0 |
POLYPHENOLS, NESOI
162.5K kg
TERT-BUTYLHYDROQUINONE
6.4K kg
PHENOL-ALCOHOLS
163 kg
PYROGALLIC ACID (1,2,3-TRIHYDROXYBENZENE)
4,4'-BIPHENOL
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
Monthly import values over time
| State | Imports | Exports | Balance |
|---|---|---|---|
| Louisiana | $3.0M | -- | -$3.0M |
| New York | $1.3M | $518K | -$752K |
| California | $756K | $597K | -$159K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NEW ORLEANS, LA | $3.1M | -- | -$3.1M |
| LAREDO, TX | -- | $1.3M | +$1.3M |
| NEW YORK, NY | $1.2M | $22K | -$1.2M |