Chapter 29: Organic chemicals

HTS heading 2918: Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulfonated, n…

78 numbered lines under heading 2918, including 62 10-digit statistical lines. The first six digits are the international HS subheading; the general column is the normal US duty rate.

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HTS heading 2918
HTS code	Description	Unit	General	Special	Column 2
2918	Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulfonated, nitrated or nitrosated derivatives:
	Carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives:
2918.11	Lactic acid, its salts and esters:
2918.11.10.00	Lactic acid	kg	5.1%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%
2918.11.51.00	Other	kg	3.4%	Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)	25%
2918.12.00.00	Tartaric acid	kg	Free		17%
2918.13	Salts and esters of tartaric acid:
2918.13.10.00	Potassium antimony tartrate (Tartar emetic)	kg	Free		4%
2918.13.20.00	Potassium bitartrate (Cream of tartar)	kg	Free		11%
2918.13.30.00	Potassium sodium tartrate (Rochelle salts)	kg	Free		11.5%
2918.13.50.00	OtherNote: See 9903.90.08.	kg	4.4%	Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)	25%
2918.14.00.00	Citric acid	kg	6%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	39.5%
2918.15	Salts and esters of citric acid:
2918.15.10.00	Sodium citrate	kg	6.5%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	42%
2918.15.50.00	Other	kg	3.7%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	25%
2918.16	Gluconic acid, its salts and esters:
2918.16.10.00	Gluconic acid	kg	6%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	25%
2918.16.50	Other		3.7%	Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)	25%
2918.16.50.10	Sodium gluconate	kg
2918.16.50.20	Calcium gluconate	kg
2918.16.50.90	Other	kg
2918.17.00.01	2,2-Diphenyl-2-hydroxyacetic acid (benzilic acid)	kg	5.8%	Free (A+,AU,BH,CL,CO,D, E,IL,JO, KR,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 40%
2918.18.00.00	Chlorobenzilate (ISO)	kg	6.5%	Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 57%
2918.19	Other:
	Aromatic:
2918.19.11.00	Benzilic acid, methyl ester	kg	5.8%	Free (A+,AU,BH,CL,CO,D, E,IL,JO, KR,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 40%
	Phenylglycolic acid (Mandelic acid), its salts and esters:
2918.19.12.00	Mandelic acid	kg	Free		15.4¢/kg + 67.5%
2918.19.15.00	Other	kg	6.5%	Free (A+,AU,BH,CL,CO,D, E,IL,JO, K,KR,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 67.5%
	Other:
2918.19.20.00	Products described in additional U.S. note 3 to section VI	kg	6.5%	Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 57%
2918.19.31.00	Other	kg	6.5%	Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 57%
	Other:
2918.19.60.00	Malic acid	kg	4%	Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)	25%
2918.19.90.00	Other	kg	4%	Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG)	25%
	Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives:
2918.21	Salicylic acid and its salts:
2918.21.10.00	Suitable for medicinal use	kg	6.5%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 72%
2918.21.50.00	Other	kg	6.5%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 57%
2918.22	O-Acetylsalicylic acid, its salts and esters:
2918.22.10.00	O-Acetylsalicylic acid (Aspirin)	kg	6.5%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 82%
2918.22.50.00	Salts and esters of O-acetylsalicylic acid	kg	6.5%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 47.5%
2918.23	Other esters of salicylic acid and their salts:
2918.23.10.00	Salol (Phenyl salicylate) suitable for medicinal use	kg	6.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 45%
	Other:
2918.23.20.00	Odoriferous or flavoring compounds	kg	6.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 58%
	Other:
2918.23.30.00	Products described in additional U.S. note 3 to section VI	kg	6.5%	Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 57%
2918.23.50.00	Other	kg	6.5%	Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 57%
2918.29	Other:
2918.29.04.00	2,3-Cresotic acid; 2-Hydroxybenzoic acid, calcium salt; 1-Hydroxy-2-naphthoic acid; 2-Hydroxy-1-naphthoic acid; 1-Hydroxy-2-naphthoic acid, phenyl ester;α-Resorcylic acid;γ-Resorcylic acid; and 5-Sulfosalicylic acid	kg	5.8%	Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,L,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 40%
2918.29.06.00	1,6-Hexanediol bis(3,5-dibutyl-4-hydroxyphenyl)propionate)	kg	5.8%	Free (A+,AU,BH,CL,CO,D,E, IL,JO,KR,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 40%
2918.29.08.00	m-Hydroxybenzoic acid	kg	Free		15.4¢/kg + 40%
2918.29.20.00	Gentisic acid; and Hydroxycinnamic acid and its salts	kg	6.5%	Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 48.5%
2918.29.22.00	p-Hydroxybenzoic acid	kg	6.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 48.5%
2918.29.25.00	3-Hydroxy-2-naphthoic acid	kg	6.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,L,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 57%
2918.29.30.00	Gallic acid	kg	1%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	2%
2918.29.39.00	4,4-Bis(4-hydroxyphenyl) pentanoic acid; and 3,5,6-Trichlorosalicylic acid	kg	Free		15.4¢/kg + 57%
	Other:
2918.29.65.00	Products described in additional U.S. note 3 to section VI	kg	6.5%	Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 57%
2918.29.75.00	Other	kg	6.5%	Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 57%
2918.30	Carboxylic acids with aldehyde or ketone function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives:
	Aromatic:
2918.30.10.00	1-Formylphenylacetic acid, methyl ester	kg	5.8%	Free (A+,AU,BH,CL,CO,D, E,IL,JO, KR,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 40%
2918.30.15.00	2-Chloro-4,5-difluoro-ß-oxobenzenepropanoic acid, ethyl ester; and Ethyl 2-keto-4-phenylbutanoate	kg	Free		15.4¢/kg + 57%
	Other:
2918.30.25	Products described in additional U.S. note 3 to section VI		6.5%	Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 57%
2918.30.25.10	Methyl 3-oxo-2-phenylbutanoate (methyl alpha-phenylacetoacetate, MAPA)	kg
2918.30.25.50	Other	kg
2918.30.30.00	Other	kg	6.5%	Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG)	15.4¢/kg + 57%
	Other:
2918.30.70.00	Dimethyl acetyl succinate; Oxalacetic acid diethyl ester, sodium salt; 4,4,4-Trifluoro-3-oxobutanoic acid, ethyl ester; and 4,4,4-Trifluoro-3-oxobutanoic acid, methyl ester	kg	Free		25%
2918.30.90.00	Other	kg	3.7%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,K,KR,L,MA,OM,P,PA,PE,S,SG)	25%
	Other:
2918.91.00.00	2,4,5-T (ISO) (2,4,5-trichlorophenoxyacetic acid), its salts and esters	kg	6.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 48.5%
2918.99	Other:
	Aromatic:
2918.99.05.00	p-Anisic acid; Clofibrate; and 3-Phenoxybenzoic acid	kg	5.8%	Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 40%
2918.99.06.00	1-Hydroxy-6-octadecyloxy-2-naphthalene- carboxylic acid; and 1-Hydroxy-6-docosyloxy-2-naphthalene- carboxylic acid	kg	Free		15.4¢/kg + 57%
2918.99.14.00	2-(4-Chloro-2-methylphenoxy)propionic acid and its salts	kg	Free		15.4¢/kg + 40.5%
	Other:
	Pesticides:
2918.99.18.00	4-(4-Chloro-2-methylphenoxy) butyric acid;p-Chlorophenoxyacetic acid; and 2-(2,4-Dichlorophenoxy) propionic acid	kg	6.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 40.5%
2918.99.20	Other		6.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 48.5%
2918.99.20.10	2,4-Dichlorophenoxyacetic acid, its salts and esters	kg
2918.99.20.15	2-Methyl-4-chlorophenoxyacetic acid	kg
2918.99.20.50	Other	kg
2918.99.30.00	Drugs	kg	6.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 47.5%
2918.99.35.00	Odoriferous or flavoring compounds	kg	6.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 58%
	Other:
2918.99.43	Products described in additional U.S. note 3 to section VI		6.5%	Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 57%
2918.99.43.10	2-Methyl-3-phenyloxirane-2-carboxylic acid (P-2-P methyl glycidic acid), its salts and esters	kg
2918.99.43.50	Other	kg
2918.99.47.00	Other	kg	6.5%	Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)	15.4¢/kg + 57%
2918.99.50.00	Other	kg	4%	Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)	25%
	VIII. ESTERS OF INORGANIC ACIDS OF NONMETALS AND THEIR SALTS, AND THEIR HALOGENATED, SULFONATED, NITRATED OR NITROSATED DERIVATIVES

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Source: Harmonized Tariff Schedule of the United States, 2026 HTS Revision 20 (effective 2026-09-28), U.S. International Trade Commission (hts.usitc.gov), imported 2026-10-07. Reference only; not legal or customs advice or a binding classification. Additional duties under Chapter 99 may apply. ShipWave is not affiliated with the USITC or U.S. Customs and Border Protection.