Chapter 29 · Organic chemicals · Section 6

HS Code 2933.53

Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital, cyclobarbital (INN), methylphenobarbital (INN), pentobarbital (INN), phenobarbital (INN), secbutabarbital (INN), secobarbital (INN) and vinylbital (INN); salts thereof

Heading 2933: Heterocyclic compounds with nitrogen hetero-atom(s) only

US duty (general)
Free
US HTS lines
1
EU CN codes
3
UK commodity codes
3
Unit
kg

US HTS + UK Tariff v4.0.1596 · updated 2026-09-10 · sources

United States - HTS lines under 2933.53

Source: official Harmonized Tariff Schedule (USITC). "General" is the normal-trade-relations rate; "Special" lists preference programs; "Other" is the column-2 rate. Additional Section 232/301 duties may apply on top.

HTS codeDescriptionGeneralSpecialOtherUnit
2933.53.00 Malonylurea (Barbituric acid) and its salts >
Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital, cyclobarbital (INN), methylphenobarbital (INN), pentobarbital (INN), phenobarbital (INN), secbutabarbital (INN), secobarbital (INN) and vinylbital (INN); salts thereof 		Free - 50% kg

Estimate the US duty runs in your browser · no caps

Enter the customs value (and quantity, when a rate is per-unit) to estimate the general-rate duty per HTS line. Estimates exclude Section 232/301 surcharges, MPF/HMF and fees. Not a customs ruling.

European Union - CN codes under 2933.53

Source: EU Combined Nomenclature (Eurostat, © European Union, reused per Decision 2011/833/EU). Duty rates and measures live in TARIC; each code links to the official consultation.

CN codeDescription
2933 53 90 Other EU duty (TARIC) →
2933 53 10 Phenobarbital (INN), barbital (INN), and their salts EU duty (TARIC) →
2933 53 00 Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital, cyclobarbital (INN), methylphenobarbital (INN), pentobarbital (INN), phenobarbital (INN), secbutabarbital (INN), secobarbital (INN) and vinylbital (INN); salts thereof EU duty (TARIC) →

United Kingdom - commodity codes under 2933.53

Source: UK Integrated Online Tariff (Open Government Licence v3.0). Declarable 10-digit codes go on the customs declaration; check the official page for the current duty and VAT measures.

Commodity codeDescription
2933 53 00 00 Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital, cyclobarbital (INN), methylphenobarbital (INN), pentobarbital (INN), phenobarbital (INN), secbutabarbital (INN), secobarbital (INN) and vinylbital (INN); salts thereof UK duty & VAT →
2933 53 10 00 Phenobarbital (INN), barbital (INN), and their salts UK duty & VAT →
2933 53 90 00 Other UK duty & VAT →
Not a customs ruling. Classification is determined by the importing country's customs authority and depends on the exact product. This page is reference information from official published schedules, not legal advice. For a binding decision, request a ruling (US: CBP CROSS · UK: HMRC ATaR · EU: BTI).

Other subheadings in 2933

2933.00 2933 Heterocyclic compounds with nitrogen hetero-atom(s) only 2933.11 Phenazone (Antipyrine) and its derivatives 2933.19 Other 2933.21 Hydantoin and its derivatives 2933.29 Other 2933.31 Pyridine and its salts 2933.32 Piperidine and its salts 2933.33 Alfentanil (INN), anileridine (INN), bezitramide (INN), bromazepam (INN), carfentanil (INN 2933.34 Other fentanyls and their derivatives 2933.35 3-Quinuclidinol 2933.36 4-Anilino-N-phenethylpiperidine (ANPP) 2933.37 N-Phenethyl-4-piperidone (NPP) 2933.39 Other 2933.41 Levorphanol (INN) and its salts

Sources: U.S. International Trade Commission, Harmonized Tariff Schedule (public domain) · EU Combined Nomenclature © European Union, Eurostat (Decision 2011/833/EU) · UK Integrated Online Tariff, contains public sector information licensed under the Open Government Licence v3.0. Data refreshed weekly. Details on About & Data Sources.