This directory combines historical reference rows with separately labelled national sources. Read the source title, observation date, printed units and conditions on each entry. National source observations do not establish all measures applicable to a shipment.

United States Customs Tariff for HS Code 291822

Acids; carboxylic acids, (with phenol function but without other oxygen function), o-acetylsalicylic acid, its salts and esters

USITC 2026 HTS Revision 19

26,806 official source entries are searchable. Checked 2026-09-22; edition published 2026-09-15.

Printed tariff and statistical lines from this edition, separate from historical WITS averages. Blank duty cells are not a confirmed zero. Review the parent tariff line, general and chapter notes, chapter 99, origin, exclusions, quotas and additional duties. No shipment total or special-rate eligibility is calculated. The edition publication date is not a line-level effective date.

Official schedule and source documentation

Official entries matching 291822

2918.22.10.00

Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulfonated, nitrated or nitrosated derivatives: › Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: › O-Acetylsalicylic acid, its salts and esters:

O-Acetylsalicylic acid (Aspirin)

Source units: kg

Column 1 — General: 6.5%
Column 1 — Special (eligibility required): Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
Column 2: 15.4¢/kg + 82%

Official source for this code

2918.22.50.00

Salts and esters of O-acetylsalicylic acid

Source units: kg

Column 1 — General: 6.5%
Column 1 — Special (eligibility required): Free (A*,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)
Column 2: 15.4¢/kg + 47.5%

Official source for this code

WITS 2023 historical MFN average

Reported average: 6.5%.

Source year: 2023. Classification: HS 2022 (H6). Checked 2026-09-14.

National lines included: 2 of 2. Excluded from the average: 0.

Reported ad-valorem range: 6.5%–6.5%.

Reported historical ad-valorem MFN simple average for 2023, not a national tariff schedule. No preferential rates, additional duties, VAT, excise or import permissions are determined.

Not a current 2026 national duty. The HS6 average does not determine the duty of a particular national subdivision, origin or shipment.

WITS observation for this code and year

UN Comtrade H6 descriptions (HS 2022)

WITS API definitions: reported averages and excluded national lines

Direct HS code answer for United States

United States HS Code 291822: 6.50% (2023 MFN average)

The source reports an indicative HS6 MFN average of 6.50% (2023 MFN average) for Acids; carboxylic acids, (with phenol function but without other oxygen function), o-acetylsalicylic acid, its salts and esters.Source status: not assessed. Verify the exact national tariff line, origin treatment, taxes, restrictions, and current customs guidance before using this information in a declaration.

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Customs tariff summary

Country: United States
HS / tariff code: 291822
Description: Acids; carboxylic acids, (with phenol function but without other oxygen function), o-acetylsalicylic acid, its salts and esters
Chapter: 29 —
Heading: 2918
Subheading: 291822
Indicative MFN HS6 average: 6.50% (2023 MFN average)
VAT / tax: Check local VAT and excise rules for the import destination.
Unit / basis: Not listed in this tariff line
Source / vintage: WITS / UNCTAD TRAINS — 2023 MFN HS6 reference

Historical MFN average

6.50% (2023 MFN average)

Import permission

not assessed

Import planning

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Details

HS Code: 291822
Chapter: 29 —
Heading: 2918
Subheading: 291822

Compare HS code 291822 across GCC countries

Each destination shows its own source label. Oman uses its national schedule; Qatar and UAE entries may cite their separately published references and unresolved exceptions. Other entries retain the historical GCC reference. National codes, duty notes, restrictions and tax treatment can differ; verify with the destination customs authority.

Saudi ArabiaSearch parent HS 291822 United Arab EmiratesSearch parent HS 291822 OmanSearch parent HS 291822 QatarSearch parent HS 291822 KuwaitSearch parent HS 291822 BahrainSearch parent HS 291822

Related HS Codes (Heading 2918)

HS Code	Description	Duty
291811	Acids; carboxylic acids, (with alcohol function but without other oxygen function), lactic acid, its salts and esters	4.25% (2023 MFN average)WITS 2023 historical MFN average
291812	Acids; carboxylic acids, (with alcohol function but without other oxygen function), tartaric acid	0.00% (2023 MFN average)WITS 2023 historical MFN average
291813	Acids; carboxylic acids, (with alcohol function but without other oxygen function); salts and esters of tartaric acid	1.10% (2023 MFN average)WITS 2023 historical MFN average
291814	Acids; carboxylic acids, (with alcohol function but without other oxygen function), citric acid	6.00% (2023 MFN average)WITS 2023 historical MFN average
291815	Acids; carboxylic acids, (with alcohol function but without other oxygen function), salts and esters of citric acid	5.10% (2023 MFN average)WITS 2023 historical MFN average
291816	Acids; carboxylic acids, (with alcohol function but without other oxygen function), gluconic acid, its salts and esters	4.85% (2023 MFN average)WITS 2023 historical MFN average
291817	Acids; carboxylic acids, (with alcohol function but without other oxygen function), 2,2-Diphenyl-2-hydroxyacetic acid (benzilic acid)	5.80% (2023 MFN average)WITS 2023 historical MFN average
291818	Acids; carboxylic acids, (with alcohol function but without other oxygen function), chlorobenzilate (ISO)	6.50% (2023 MFN average)WITS 2023 historical MFN average
291819	Acids; carboxylic acids, (with alcohol function but without other oxygen function), other than lactic, tartaric, citric, and gluconic acids and their salts and esters	4.76% (2023 MFN average)WITS 2023 historical MFN average
291821	Acids; carboxylic acids, (with phenol function but without other oxygen function), salicylic acid and its salts	6.50% (2023 MFN average)WITS 2023 historical MFN average
291823	Acids; carboxylic acids, (with phenol function but without other oxygen function), other esters of salicylic acid and its salts n.e.c. in item no. 2918.2	6.50% (2023 MFN average)WITS 2023 historical MFN average
291829	Acids; carboxylic acids, (with phenol function but without other oxygen function), their anhydrides, halides, peroxides, peroxyacids and their derivatives, n.e.c. in item no. 2918.2	4.51% (2023 MFN average)WITS 2023 historical MFN average
291830	Acids; carboxylic acids, (with aldehyde or ketone function but without other oxygen function), their anhydrides, halides, peroxides, peroxyacids and their derivatives	3.75% (2023 MFN average)WITS 2023 historical MFN average
291891	Acids; carboxylic acids, with additional oxygen function (not alcohol, phenol, aldehyde or ketone) and their anhydrides, halides, peroxides and peroxyacids; 2,4,5-T (ISO) (2,4,5-trichlorophenoxyacetic acid), its salts and esters	6.50% (2023 MFN average)WITS 2023 historical MFN average
291899	Acids; carboxylic acids, with additional oxygen function (not alcohol, phenol, aldehyde or ketone) and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives; other than 2,4,5-T (ISO)	4.88% (2023 MFN average)WITS 2023 historical MFN average

Data source: WITS/UNCTAD TRAINS (MFN 2022). Values are indicative HS6 MFN averages, not shipment-specific applied rates. Import permission and restrictions are not assessed. Historical reference rates exclude VAT, excise and other national measures. Separate national entries preserve the columns printed by their source; these are not a complete shipment assessment. Full disclaimer.