Harmonized Tariff Schedule of the U.S. › Chapter 29 Organic chemicals
2931.90.70.00Tariff line
Classification path
Other organo-inorganic compounds
2931
Other
Other
N,N'-Bis(trimethylsilyl) urea; 3-(Hydroxymethylphosphinyl)-1-propanoic acid, 2-hydroxyethyl ester; and 2-Phosphonobutane-1,2,4-tricarboxylic acid and its salts
2931.90.70.00
Rates of duty
General rate (Column 1)Free
Special—
Column 225%
Unitkg
Printed page 1539
Measure flags
for origin CN, entry date 2026-10-25 · base rate Free
- Section 301 forced-labor tariff (12.5%)9903.05.31Applies+12.5%China: Column 1 rate + 12.5% additional
- China 301 List 3 (9903.88.03)9903.88.03Applies+25%8-digit subheading 2931.90.70 is on L3
- PGAEPA EP7
Confirmed total 37.5% · max 37.5%Full duty breakdown →