Heading 29.17 — Acids; polycarboxylic acids, their anhydrides, h... 6-digit code

2917.20 Acids; cyclanic, cyclenic or cycloterpenic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and derivatives

A full HS code. These six digits are what goes on a customs declaration, and they mean the same thing in every country that uses the Harmonized System.

Section VI, Chemical Products — inorganic and organic chemicals, pharmaceuticals, fertilisers, paints and cosmetics.

  1. 29 Chapter Organic chemicals
  2. 17 Heading Acids; polycarboxylic acids, their anhydrides, halides, peroxides and peroxy-acids; their halogenated, sulphonated, nitrated or nitrosated derivatives
  3. 20 Subheading Acids; cyclanic, cyclenic or cycloterpenic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and derivatives

Chapter 29 covers organic chemicals: hydrocarbons, alcohols, acids, esters and other carbon-based compounds that feed into pharmaceuticals, plastics, solvents and countless other manufactured goods. With over 400 six-digit codes it's the single largest chapter in the entire Harmonized System, since organic chemistry produces so many distinct, precisely defined compounds. Classification tip: Because chapter 29 is organized by precise chemical structure (not by end use), classification usually requires the compound's exact chemical name or CAS number: a generic product description is rarely enough to pick the right six-digit code.

All of chapter 29

Other codes under 29.17

2917.11 Acids; acyclic polycarboxylic acids; oxalic acid, its salts and esters 2917.12 Acids; acyclic polycarboxylic acids; adipic acid, its salts and esters 2917.13 Acids; acyclic polycarboxylic acids; azelaic acid, sebacic acid, their salts and esters 2917.14 Acids; acyclic polycarboxylic acids; maleic anhydride 2917.19 Acids; acyclic polycarboxylic acids; n.e.c. in item no. 2917.1 2917.32 Acids; aromatic polycarboxylic acids; dioctyl orthophthalates 2917.33 Acids; aromatic polycarboxylic acids; dinonyl or didecyl orthophthalates 2917.34 Acids; aromatic polycarboxylic acids; other esters of orthophthalic acids 2917.35 Acids; aromatic polycarboxylic acids; phthalic anhydride 2917.36 Acids; aromatic polycarboxylic acids; terephthalic acid and its salts 2917.37 Acids; aromatic polycarboxylic acids; dimethyl terephthalate 2917.39 Acids; aromatic polycarboxylic acids; n.e.c. in item no. 2917.3

The wording above is the Harmonized System nomenclature as published by the World Customs Organization, HS 2022 edition. It is a classification reference, not a tariff: it carries no duty rates, and it stops at six digits — the importing country adds its own beyond that.

Classification is decided by the General Rules of Interpretation and the section and chapter notes, and it is the importing country’s customs authority that makes it binding.

Shipping goods under 2917.20? A customs hold shows up as a milestone that stops moving — follow the container or the air waybill from departure to delivery.

Track a shipment

2917.20 FAQ

2917.20 covers acids; cyclanic, cyclenic or cycloterpenic polycarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and derivatives. It sits under heading 29.17 (acids; polycarboxylic acids, their anhydrides, halides, peroxides and peroxy-acids; their halogenated, sulphonated, nitrated or nitrosated derivatives) in chapter 29, Section VI of the Harmonized System.

It is the international part of it. Six digits are the same in every country that applies the Harmonized System; the importing country then extends them to eight or ten for its own tariff and statistics. Declare 2917.20 plus whatever national digits the destination’s tariff schedule adds to it.

The General Rules of Interpretation, read together with the notes to Section VI and to chapter 29. A description that reads right is not enough on its own — the notes routinely pull goods out of the chapter they obviously belong to and put them somewhere else. Where duty or licensing turns on the answer, ask the importing country’s customs authority for a binding ruling.

A wrong or missing code is one of the common reasons customs holds a container, and a hold shows up as a milestone that stops moving. Watch for it in the container tracking app, on the air waybill in the air cargo tracker, or through the tracking API.

© 2026 Tracking One. All rights reserved.