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HSN 291818% GSTITC EligibleRCM: Check notificationsLast reviewed: 22 Jan 2026

CARBOXYLIC ACIDS WITH ADDITIONAL OXYGEN FUNCTION AND THEIR ANHYDRIDES

GST rate for HSN 2918 is 18%. Use the calculator, copy invoice-ready details, and verify ITC/RCM hints before filing (FY 2025–26).

Not legal advice • Verify before filing
Quick summary
TypeGoods
Intra-state split9% CGST + 9% SGST
Inter-state18% IGST
Tip: Compare nearby headings and chapter notes to avoid wrong classification.

GST Rate for HSN 2918

18%

Specific items under 2918

HSN CodeDescriptionGST Rate
291811LACTIC ACID, ITS SALTS AND ESTERS :18%
291812TARTARIC ACID18%
291813SALTS AND ESTERS OF TARTARIC ACID :18%
291814CITRIC ACID18%
291815SALTS AND ESTERS OF CITRIC ACID :18%
291816GLUCONIC ACID, ITS SALTS AND ESTERS :18%
2918172, 2-DIPHENYL-2-HYDROXYACETIC ACID (BENZILIC ACID)18%
291818CHLOROBENZILATE (ISO)18%
291819OTHER:18%
291821SALICYLIC ACID AND ITS SALTS :18%
291822O-ACETYLSALICYLIC ACID, ITS SALTS AND ESTERS18%
291823OTHER ESTERS OF SALICYLIC ACID AND THEIR SALTS :18%
291829OTHER :18%
291830CARBOXYLIC ACIDS WITH ALDEHYDE OR KETONE FUNCTION BUT WITHOUT OTHER OXYGEN FUNCTION, THEIR ANHYDRIDES, HALIDES, PEROXIDES,PEROXYACIDS AND THEIR DERIVATIVES:18%
2918912, 4, 5-T(ISO) (2, 4, 5-TRICHLOROPHENOXYACETIC ACID), ITS SALTS AND ESTERS18%
291899OTHER:18%
29181110LACTIC ACID18%
29181120CALCIUM LACTATE18%
29181190OTHER18%
29181200TARTARIC ACID18%
29181310POTASSIUM BITARTRATE18%
29181320METROPROLOL TARTRATE18%
29181390OTHER18%
29181400CITRIC ACID18%
29181510POTASSIUM CITRATE18%
29181520SODIUM CITRATE18%
29181530BISMUTH CITRATE18%
29181540DISODIUM HYDROGEN CITRATE18%
29181550FERRIC AMMONIUM CITRATE18%
29181590OTHER18%
29181610CALCIUM GLUCONATE18%
29181620FERROUS GLUCONATE18%
29181690OTHER18%
291817002, 2-Diphenyl-2-hydroxyacetic acid (benzilic acid)18%
29181800CHLOROBENZILATE (ISO)18%
29181900CARBOXYLIC ACIDS WITH ADDITIONAL OXYGEN FUNCTION AND THEIR ANHYDRIDES, HALIDES, PEROXIDES AND PEROXYACIDS; THEIR HALOGENATED, SULPHONATED, NITRATED OR NITROSATED DERIVATIVES - CARBOXYLIC ACIDS WITH ALCOHOL FUNCTION, BUT WITHOUT OTHER OXYGEN FUNCTION, THEIR ANHYDRIDES, HALIDES, PEROXIDES, PEROXYACIDS AND THEIR DERIVATIVES : OTHER18%
29181910BENZENEACETIC ACID, ALPHA-HYDROXY-ALPHA-PHENYL-18%
29181920Cholic acid18%
29181930Ricinoleic acid18%
29181990OTHER18%
29182110SALICYLIC ACID18%
29182120SODIUM SALICYLATE18%
29182190OTHER18%
29182200O-ACETYLSALICYLIC ACID, ITS SALTS AND ESTERS18%
29182310METHYL SALICYLATE18%
29182320AMINO SALICYLATE18%
29182330SALICYLAMIDE18%
29182340Benzyl salicylate18%
29182390OTHER18%
29182910GALLIC ACID18%
29182920BETA HYDROXY NAPTHOIC ACID18%
29182930PROPYL GALLATE18%
29182990OTHER18%
29183010LEVULINIC ACID18%
29183020ETHYL ACETO ACETATE (ACETOACETIC ESTER)18%
29183030NALIDIXIC ACID18%
29183040METHYL ACETO ACETATE18%
29183050Fluoro benzoyl butyric acid18%
29183090OTHER18%
29189000CARBOXYLIC ACIDS WITH ADDITIONAL OXYGEN FUNCTION AND THEIR ANHYDRIDES, HALIDES, PEROXIDES AND PEROXYACIDS; THEIR HALOGENATED, SULPHONATED, NITRATED OR NITROSATED DERIVATIVES - OTHER18%
291891002, 4, 5-T(ISO) (2, 4, 5-TRICHLOROPHENOXYACETIC ACID), ITS SALTS AND ESTERS18%
29189900CARBOXYLIC ACIDS WITH ADDITIONAL OXYGEN FUNCTION AND THEIR ANHYDRIDES, HALIDES, PEROXIDES AND PEROXYACIDS; THEIR HALOGENATED, SULPHONATED, NITRATED OR NITROSATED DERIVATIVES - OTHER -- OTHER18%
29189910Sodium phenoxy acetate18%
29189920METHYL (E)-2-[2-(CHLORO METHYL) PHENYL]-3-METHOXYACRYLATE18%
29189990Other18%

Tax calculator for HSN 2918

Enter a taxable value to calculate GST. You can use this for a quick invoice estimate.

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Not legal advice • Verify before filing • For services (99), place-of-supply rules can change tax type.

Invoice example (₹1,000 taxable value)

Intra-state (CGST + SGST)
Taxable value₹1,000
CGST (9%)90.00
SGST (9%)90.00
Total invoice1180.00
Inter-state (IGST)
Taxable value₹1,000
IGST (18%)180.00
Total invoice1180.00
Chapter note
Organic Chemicals. Hydrocarbons, Alcohols, Ethers. Mostly 18%.

Compliance pointers (ITC / RCM / classification)

ITC hint

Input Tax Credit depends on usage conditions, restrictions, and supplier eligibility. Treat this as a quick hint — verify for edge cases.

ITC Eligible
RCM / special cases

Reverse Charge is notification-based and can depend on supplier status and transaction type. If you see a warning, double-check notifications and your invoice terms.

No chapter-level RCM note found. Still verify based on notification + supplier category.
Classification checks
  • Compare adjacent headings within Chapter 29 before finalizing.
  • Use chapter notes to avoid common confusions (materials vs finished goods, kits, etc.).
  • For services (99), place-of-supply can change whether IGST/CGST+SGST applies.

FAQs for HSN 2918

What is the GST rate for HSN 2918?

GST rate for HSN 2918 is 18%. Always verify the latest CBIC/GST notifications for changes.

Is HSN mandatory on invoices?

HSN is generally required on B2B invoices; the number of digits depends on turnover and the nature of supply. Exports/imports typically use more detailed codes.

How do I use this code on an invoice?

Add HSN 2918 in the line item and apply GST @ 18%. For intra-state supplies: 9% CGST + 9% SGST. For inter-state supplies: 18% IGST.

Does ITC apply for this HSN?

ITC depends on conditions and restrictions under GST law, plus the nature of usage and supplier eligibility. Use the ITC badge as a hint and verify with your CA for edge cases.

Can Reverse Charge (RCM) apply here?

RCM is notification-based and depends on the supply category, supplier status, and transaction type. If you see an RCM note, treat it as a “verify” signal.

What if I pick the wrong HSN?

Wrong classification can cause rate mismatch, notices, interest/penalty exposure, and reconciliation issues. Compare nearby headings and chapter notes before finalizing.

Sources & accuracy

Not legal advice • Always verify before filing • Page URL uses your deployed site base (no localhost leaks).

Next steps after choosing HSN 2918