HSN code directory

HSN Code 2918: Carboxylic acids with additional oxygen function

Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives


All 8-digit HSN codes under this heading

HSN codeDescription
29181110Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: - lactic acid, its salts and esters: lactic acid
29181120Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: - lactic acid, its salts and esters: calcium lactate
29181190Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: - lactic acid, its salts and esters: other
29181200Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: tartaric acid
29181310Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: - salts and esters of tartaric acid: potassium bitartrate
29181320Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: - salts and esters of tartaric acid: metroprolol tartrate
29181390Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: - salts and esters of tartaric acid: other
29181400Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: citric acid
29181510Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: - salts and esters of citric acid: potassium citrate
29181520Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: - salts and esters of citric acid: sodium citrate
29181530Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: - salts and esters of citric acid: bismuth citrate
29181540Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: - salts and esters of citric acid: disodium hydrogen citrate
29181550Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: - salts and esters of citric acid: ferric ammonium citrate
29181590Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: - salts and esters of citric acid: other
29181610Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: - gluconic acid, its salts and esters: calcium gluconate
29181620Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: - gluconic acid, its salts and esters: ferrous gluconate
29181690Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: - gluconic acid, its salts and esters: other
29181800Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives - - chlorobenzilate (iso)
29181900Carboxylic acids with alcohol function, but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: other
29181910Benzeneacetic acid, alpha-hydroxy-alpha-phenyl-
29181990Other
29182110Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: salicylic acid and its salts: salicylic acid
29182120Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: salicylic acid and its salts: sodium salicylate
29182190Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: salicylic acid and its salts: other
29182200Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: o-acetylsalicylic acid, its salts and esters
29182310Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: other esters of salicylic acid and their salts: methyl salicylate
29182320Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: other esters of salicylic acid and their salts: amino salicylate
29182330Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: other esters of salicylic acid and their salts: salicylamide
29182390Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: other esters of salicylic acid and their salts: other
29182910Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: other: gallic acid
29182920Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: other: beta hydroxy napthoic acid
29182930Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: other: propyl gallate
29182990Carboxylic acids with phenol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: other: other
29183010Carboxylic acids with aldehyde or ketone function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: levulinic acid
29183020Carboxylic acids with aldehyde or ketone function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: ethyl aceto acetate (acetoacetic ester)
29183030Carboxylic acids with aldehyde or ketone function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: nalidixic acid
29183040Carboxylic acids with aldehyde or ketone function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: methyl aceto acetate
29183090Carboxylic acids with aldehyde or ketone function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: other
29189000Other
29189100Other - - 2, 4, 5-t (iso) (2, 4, 5-trichlorophenoxyacetic acid) its salts and esters
29189900Other - - other


GST rate guide for this chapter

Most organic chemicals are taxed at 18%. Some items, such as certain bulk drug intermediates, can have other rates.


GST rates depend on the exact description of the goods in the rate schedules, not only on the HSN code. Some goods under the same heading are taxed at different rates, and conditions or exemptions can apply. Confirm the rate for your product before you raise invoices.


Frequently asked questions


How many digits of the HSN code must I show on a GST invoice?


Businesses with aggregate turnover of up to ₹5 crore in the previous year must show at least a 4-digit HSN code on B2B invoices. Businesses with turnover above ₹5 crore must show a 6-digit code on all invoices. The full 8-digit code is used for imports and exports.


What is the difference between an HSN heading and an 8-digit HSN code?


The first 2 digits are the chapter, 4 digits are the heading and 6 digits are the subheading under the international Harmonized System. India adds 2 more digits for a more precise tariff item, giving the 8-digit code used in customs and GST.


What happens if I use the wrong HSN code?


A wrong HSN code can lead to tax being charged at the wrong rate, mismatches in GSTR-1 and the HSN summary, and notices with interest and penalty. If you are unsure about classification, a CA can review it before you file.


Need help with classification or GST rates? GST registration and return filing or book a free consultation with our CA-led team.