What HS code 2923.90 covers
HS code 2923.90 classifies quaternary ammonium salts and hydroxides; whether or not chemically defined n.e.c. in heading no. 2923. It is a subheading of heading 2923 (Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined), in chapter 29 (Organic chemicals), section VI of the Harmonized System. These six digits are identical in every country that uses the HS.
Classification path
Import duty for 2923.90
仅为最惠国基础税率。中国原产货物还可能在此之上叠加301条款关税和2025年IEEPA关税。
来源：HTSUS / CBP
对第三国普遍适用的最惠国税率。各国17%至27%不等的进口增值税，以及任何反倾销措施，均需另行计算。
来源：TARIC
Imported this in 2024 or 2025?
Courts voided some of the tariffs importers paid on goods like this. You may be owed money back. The audit is free and we only get paid when you do.
Related codes in heading 2923
Not quite the right fit? These subheadings sit under the same heading and are the most common alternatives to 2923.90.
- 2923.10 Quaternary ammonium salts and hydroxides; choline and its salts, whether or not chemically defined
- 2923.20 Lecithins and other phosphoaminolipids, whether or not chemically defined
- 2923.30 Quaternary ammonium salts and hydroxides; tetraethylammonium perfluorooctane sulphonate, whether or not chemically defined
- 2923.40 Quaternary ammonium salts and hydroxides; didecyldimethylammonium perfluorooctane sulphonate, whether or not chemically defined
Confirm the code for your exact product
A 6-digit subheading still covers a range of products. The wrong code at the border can mean overpaying duty, a delayed shipment, or a penalty. Describe your exact item and HS Mate confirms whether 2923.90 is right, with the duty rate and an audit trail your customs broker can accept.