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HS Code 2901.23 : Acyclic hydrocarbons, Unsaturated, Butene (Butylene) and isomers thereof

The 6-digit Harmonized System (HS) code for acyclic hydrocarbons, unsaturated, butene (butylene) and isomers thereof is 2901.23. Under the 2026 Costa Rica (Aduanas), the representative MFN general duty rate is 0% [Dirección General de Aduanas (DGA)].

Chapter

Ch 29

Heading

2901

Subheading

2901.23

CR MFN Duty

MODULE 3: SIGNATURE A: HS DECODE VISUAL HIERARCHY

Chapter 29

Acyclic hydrocarbons

Heading 2901

2901

Acyclic hydrocarbons

Subheading .23

.23

Unsaturated, Butene (Butylene) and isomers thereof

MODULE 4: SIGNATURE B: TARIFF MATRIX

Import Duty Rates by Destination

Costa Rica (Dirección General de Aduanas Costa Rica Tariff 2026)

2901.23

Representative General Duty

Verified July 2026 · Dirección General de Aduanas (DGA)

MODULE 5: COSTA RICA IMPORT DUTY & 13% IVA BREAKDOWN

Base Customs Duty

MFN Rate [Dirección General de Aduanas (DGA)]

Import VAT / Tax Rate

13% IVA

Local Tax Rate

De Minimis Threshold

US$50

Customs Exemption Limit

Notice: Costa Rica customs entry, tariff classification, MFN duty rates, and 13% IVA are governed by Dirección General de Aduanas (DGA). Always verify declarable lines with Dirección General de Aduanas (DGA) prior to import.

TRACK THIS HS CODE

Get Real-Time Tariff & Trade Remedy Change Alerts for HS 2901.23

Receive an automated email notification whenever USITC or CBP publishes duty rate adjustments or customs notices for 2901.23.

MODULE 6: Mandatory Customs Entry Document Matrix

Rule-Derived Customs Entry Package Checklist

UNIVERSAL DOCUMENT

Commercial Invoice

Itemized description, currency, Incoterms, seller/buyer details, and country of origin.

UNIVERSAL DOCUMENT

Packing List & Bill of Lading

Gross/net weight, container/seal numbers, piece count, and transport B/L or Air Waybill.

PREFERENTIAL RULE

Certificate of Origin (If Claiming FTA)

Required only when claiming zero-duty preference under USMCA, KORUS, or GSP.

MODULE 7: Regulatory Compliance & Partner Government Agency (PGA) Flags

Standard Entry This commodity does not carry mandatory PGA pre-clearance flags under the ACE message set.

MODULE 8: Trade Remedies (Section 301, Section 232, AD/CVD)

China Section 301 Tariff Status

0% Additional Duty (Exempt)

Section 232 Steel/Aluminum Status

Exempt (Non-Metal Commodity)

EU CBAM Carbon Alert

Not in Scope

MODULE 9: Free Trade Agreements (FTA) & Rules of Origin (RoO)

Browse all preferential trade calculators & compliance tools in our Customs Tools Hub ↗.

Agreement Code	Trade Agreement / Program	Preferential Rate	Rules of Origin (RoO) Requirement
P	United States-Mexico-Canada Agreement (USMCA)	Free	Must meet USMCA Regional Value Content (RVC) or tariff shift rules.
KR	U.S.-Korea Free Trade Agreement (KORUS)	Free	Direct shipment from South Korea with KORUS Certificate of Origin.
AU	U.S.-Australia Free Trade Agreement	Free	Wholly obtained or tariff shift rule under US-Australia FTA.
A / D	GSP / African Growth & Opportunity Act (AGOA)	Free	35% local value-add requirement for beneficiary country origin.

MODULE 10: Logistics, Freight & Transport Specifications

Standard 20ft Container

~28 CBM / 28,000 kg Payload

Standard 40ft High-Cube

~68 CBM / 28,600 kg Payload

Stowage Factor & Handling

Standard commercial packaging for Acyclic hydrocarbons, Unsaturated, Butene (Butylene) and isomers thereof

MODULE 11: Dirección General de Aduanas Costa Rica Advance Ruling System

Legally binding advance tariff rulings issued by Dirección General de Aduanas Costa Rica for HS 2901.23.

Query official Customs portal:

Search Official Customs Portal for 2901.23 →

Costa Rica Declarable Tariff Schedule (2901.23)

National line-level (8/10-digit) detail for Costa Rica (Aduanas): coverage in progress.

Universal 6-digit WCO backbone applied rate: 0%. Confirm the full national commodity code at the official source (Dirección General de Aduanas (DGA)).

MODULE 12: Candidate Subheadings & Related Codes

Related HS Code	Heading Category	Action
2901.10	Subheading under Heading 2901	Compare Subheading 2901.10 →
2901.21	Subheading under Heading 2901	Compare Subheading 2901.21 →
2901.22	Subheading under Heading 2901	Compare Subheading 2901.22 →
2901.24	Subheading under Heading 2901	Compare Subheading 2901.24 →
2901.29	Subheading under Heading 2901	Compare Subheading 2901.29 →

Official Primary Sources & Authority References

USITC HTS Chapter 29 Tariff Schedule (2026) ↗

Official U.S. 10-digit tariff lines and general duty rates for Acyclic hydrocarbons, Unsaturated, Butene (Butylene) and isomers thereof.

CBP CROSS Ruling Database (2901.23) ↗

Binding customs classification precedents for Heading 2901.

MODULE 14: Frequently Asked Questions (FAQ) & Operational Guide

What is the 6-digit WCO tariff classification and United States (USITC HTS) general duty for Acyclic hydrocarbons, Unsaturated, Butene (Butylene) and isomers thereof?

Under WCO Harmonized System 2022 and United States (USITC HTS), Acyclic hydrocarbons, Unsaturated, Butene (Butylene) and isomers thereof is classified under HS 2901.23 (Heading 2901, Chapter 29). The representative CR MFN general duty rate is 0%.

How is HS 2901.23 distinguished within Heading 2901 (Acyclic hydrocarbons)?

Heading 2901 covers Acyclic hydrocarbons. Subheading 2901.23 specifically isolates Unsaturated, Butene (Butylene) and isomers thereof. Importers must verify whether physical characteristics, processing state, or composition require alternative subheadings under Heading 2901.

What are the primary candidate subheadings related to HS 2901.23?

Related subheadings under Heading 2901 include 2901.10, 2901.21, 2901.22, 2901.24, 2901.29. Classification depends on processing stage, decaffeination, purity, or material form.

What mandatory commercial entry documents are required to import Acyclic hydrocarbons, Unsaturated, Butene (Butylene) and isomers thereof?

Commercial Invoice (detailing Incoterms, currency, and origin), Packing List, Bill of Lading (or Air Waybill), CBP Form 7501 Entry Summary, and a continuous customs bond are required for formal entries.

Can goods under HS 2901.23 enter duty-free under USMCA or Free Trade Agreements?

Yes. Eligible goods originating in Mexico, Canada, South Korea, or Australia enter duty-free under preference SPI codes (P, KR, AU) provided they satisfy Regional Value Content (RVC) or tariff-shift rules with a valid Certificate of Origin.

What is the US formal entry threshold for shipments of Acyclic hydrocarbons, Unsaturated, Butene (Butylene) and isomers thereof?

Commercial shipments of Acyclic hydrocarbons, Unsaturated, Butene (Butylene) and isomers thereof with a customs value exceeding $2,500 USD require formal customs entry (CBP Form 7501) and a continuous entry bond. Informal entry applies to lower values.

How can an importer obtain a binding CBP classification ruling for HS 2901.23?

Importers may submit an e-Ruling request under 19 CFR Part 177 to CBP National Commodity Specialist Division (NCSD) to obtain a legally binding tariff classification ruling prior to importation.

What import VAT or sales tax applies to HS 2901.23 in Costa Rica?

Commercial imports of Acyclic hydrocarbons, Unsaturated, Butene (Butylene) and isomers thereof under HS 2901.23 into Costa Rica are subject to 13% IVA, assessed on the entered customs value plus applicable duties.

What is the customs duty de minimis threshold in Costa Rica?

The customs de minimis threshold for import shipments into Costa Rica is US$50. Consignments under this value may qualify for duty-free or simplified entry under local regulations.

Which authority regulates customs entry and tariff classification in Costa Rica?

Customs declarations, import duty assessments, and Costa Rica DGA Advance Ruling System for HS 2901.23 are administered by Dirección General de Aduanas (DGA).

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