---
title: "HSN Code for Other Carboxylic Acids with Oxygen Function | HSN 29181900 GST Rate"
description: "Find HSN and GST Rates for 29181900 related to Other Carboxylic Acids with Oxygen Function with BUSY Accounting - The reliable source for HSN and GST details in India."
canonical: "https://busy.in/hsn/hsn-29181900/"
---

# HSN Code 29181900: Other Carboxylic Acids with Oxygen Function

- [Section 06: Guide to HSN Section 06](https://busy.in/hsn/section-06/)
- [Chapter 29: Organic Chemicals](https://busy.in/hsn/chapter-29/)
- [Sub-chapter 2918: Carboxylic acids and derivatives](https://busy.in/hsn/sub-chapter-2918/)

## GST rates

| Description | CGST | SGST | IGST | CESS |
| --- | --- | --- | --- | --- |
| Carboxylic 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 : other | 9% | 9% | 18% | 0% |

## Frequently asked questions

### What products are classified under HSN 29181900 ?

It includes Diethyl phosphite

### Does packaging or labelling change the GST for Other Carboxylic Acids with Oxygen Function?

For food/agri items, GST can be 5% when not fresh/chilled and sold as pre‑packaged & labelled; otherwise often Nil. For non‑food items, rates depend on the specific sub‑heading.

### Any common misclassification issue with Other Carboxylic Acids with Oxygen Function?

Use the exact HSN and describe the form/grade. For multi‑line invoices, apply the rate per line to avoid wrong tax collection.

### Can we claim ITC on inputs used to trade Other Carboxylic Acids with Oxygen Function?

If your outward supply is taxable, eligible ITC is available subject to general restrictions. For exempt/Nil supplies, reverse credit per Rule 42.

### How much GST applies to Other Carboxylic Acids with Oxygen Function?

Under HSN 29181900, Other Carboxylic Acids with Oxygen Function attracts Varies when sold in taxable form. Describe the exact form on the invoice.

### How should mixed supplies be billed when Other Carboxylic Acids with Oxygen Function is sold with other items?

Use separate invoice lines per HSN and apply the correct rate per line (e.g., Varies for Other Carboxylic Acids with Oxygen Function; Nil for exempt items if applicable).