Harmonized Tariff Schedule of the United States · HTS code · HS 2921.19
2921.19.31: 3-Amino-3-methyl-1-butyne; (Dimethylamino)isopropyl chloride hydrochloride
Not declarable on its own: use one of its 1 subdivisions Data: Harmonized Tariff Schedule of the United States · checked on 24 October 2026
- 2921 Amine-function compounds
- Acyclic monoamines and their derivatives; salts thereof:
- 2921.19 Other:
- 2921.19.31 3-Amino-3-methyl-1-butyne; (Dimethylamino)isopropyl chloride hydrochloride
What you pay
Importing into USA
US additional duties of HTS chapter 99 in force on 22 October 2026 are included (Section 301, 232, 338 and 201). IEEPA duties are no longer collected after the Supreme Court ruling of February 2026. Conditional exemptions (US content, end use, metal share) are not computed: check the provision.
Additional duties and import rules
Charges on top of the customs duty, and rules the goods must meet at the border.
Additional duties and charges 1
- Additional dutySection 301 — China — technology transfer, IP and innovation (2018 actions and 2024 four-year review) 25%
- Applies to goods from
- China
- In force
- from 24 September 2018
- Legal act
- HTSUS 9903.88.03
Same subheading in other tariffs
2921.19 Acyclic monoamines and their derivatives; salts thereof: other
UK Free – 6% Third-country duty 10 tariff lines · average 4.2% 
EU Free – 6.5% Third-country duty 3 tariff lines · average 4.1% 
Türkiye Free – 6.5% Third-country duty 16 tariff lines · average 6% 
Canada Free Third-country duty 3 tariff lines 
Mexico Free – 5% Third-country duty 8 tariff lines · average 3.1% 
Brazil Free – 12.6% Third-country duty 20 tariff lines · average 1.2% 
Argentina Free – 12.6% Third-country duty 30 tariff lines · average 0.8% 
Peru Free Third-country duty 8 tariff lines 
New Zealand Free Third-country duty 8 tariff lines 
Japan 3.1% Third-country duty 1 tariff line 
Taiwan 1% Third-country duty 3 tariff lines 
GCC 5% Third-country duty 10 tariff lines 
Switzerland Free Third-country duty 1 tariff line 
Norway Free Third-country duty 3 tariff lines 
North Macedonia 3% – 5% Third-country duty 3 tariff lines · average 4.3% 
Nigeria 5% Third-country duty 1 tariff line USA lines: 2921.19
Binding rulings for similar goods
Decisions of U.S. Customs and Border Protection (CROSS) and HMRC (Advance Tariff Rulings) on goods classified here. A ruling binds only its holder, but shows how the authorities classify similar goods. The descriptions are the authorities’ own, in English.
- N348879 U.S. CBP
The tariff classification of Dimethyl Octadecylamine (CAS No. 124-28-7) from China
- N331139 U.S. CBP
The tariff classification of Oleyl dimethyl amine (CAS # 28061-69-0) from China
- N316935 U.S. CBP
The tariff classification of Taurine (CAS 107-35-7) from Japan
- N311706 U.S. CBP
The tariff classification of certain Tertiary Amine and Quaternary Ammonium Compounds from China
- 600014980 HMRC
Product is a chemical liquid used for training purposes with radiation training devices. It is applied to a surface which then forms a vapour cloud due to its electrolytic properties. The vapour cloud is then detected by the radiation training devices. It is provided in 35ml aluminium cans. The…
8 rulings in total for this code
Legal notes
HTS code 2921.19.31 is a line of the Harmonized Tariff Schedule of the United States under HS subheading 2921.19 (acyclic monoamines and their derivatives; salts thereof: other).
The general duty is free, and quantities are declared in kg.
For the same subheading, the UK duty is 0%–6%, the EU duty is 0%–6.5%, the Türkiye duty is 0%–6.5%, the Canada duty is free, the Mexico duty is 0%–5%, the Brazil duty is 0%–12.6%, the Argentina duty is 0%–12.6%, the Peru duty is free, the New Zealand duty is free, the Japan duty is 3.1%, the Taiwan duty is 1%, the GCC duty is 5%, the Switzerland duty is free, the Norway duty is free, the North Macedonia duty is 3%–5% and the Nigeria duty is 5%.
The United States imported goods of subheading 2921.19 worth US$162m in 2024; the largest supplier was China.
Questions and answers
What is the USA import duty for HTS code 2921.19.31?
The general duty in the Harmonized Tariff Schedule of the United States is free; the supplementary unit is kg. Preferential rates for goods from agreement countries, anti-dumping duties and VAT are not included.
Where does the United States import these goods from?
For subheading 2921.19 as a whole, the largest supplier in 2024 was China (US$55m), followed by the Philippines.