Standard International Trade Classification
U.S. imports of Saturated Acyclic Monocarboxylic Acids (NES), Anhydrides, Halides, Peroxides, and Derivatives (SITC 51377) totaled $42.2M in August 2026, imported from 36 countries.
Importers of Saturated Acyclic Monocarboxylic Acids (NES), Anhydrides, Halides, Peroxides, and Derivatives paid $3.9M in duties in August 2026, an average duty rate of 9.28% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataAcetic anhydride — one of the most commercially significant compounds in this residual heading — is a controlled precursor chemical subject to DEA import permit requirements due to its use in illicit narcotics synthesis, making regulatory compliance a primary concern for legitimate industrial importers. Beyond acetic anhydride, this heading captures a diverse range of saturated fatty acid derivatives including propionic acid, caprylic acid, and their halogenated or sulfonated variants used in agrochemicals, pharmaceuticals, and specialty polymer production. The "not elsewhere specified" scope means classification disputes are common, and importers should document the precise chemical identity, CAS number, and intended use on entry paperwork.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
766 import shipments a month
Acetic anhydride is a List II controlled chemical under the Chemical Diversion and Trafficking Act because it is a precursor in heroin synthesis. US importers must obtain a DEA import permit, maintain transaction records, and report imports above threshold quantities. Failure to comply carries significant civil and criminal penalties.
Because this heading captures acids and derivatives not classified elsewhere, customs brokers recommend including the full IUPAC name, CAS registry number, molecular formula, and a brief description of the manufacturing process or intended use in the entry package. This documentation supports correct classification and reduces the risk of a CF-28 request for additional information from CBP.
Trade Directory
List your company and tag the 6-digit products you trade, so the companies trading them can find you. Be the first supplier listed.
Basic heading 99 of 465 in section 5
Basic heading 51377 · $42.2M of $27.5B
Imports · August 2026
origin
Malaysia pays 12.2% duty; Mexico 0.7%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$42.2MYoY · free account
Exports
$37.3MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $462.3M of Saturated Acyclic Monocarboxylic Acids (NES), Anhydrides, Halides, Peroxides, and Derivatives and exported $403.3M.
Through August 2026. Source: U.S. Census Bureau.