---
title: "HSN Code for Phosphonic acid,ethyl | HSN 29310041 GST Rate"
description: "Find HSN and GST Rates for 29310041 related to Phosphonic acid,ethyl with BUSY Accounting - The reliable source for HSN and GST details in India."
canonical: "https://busy.in/hsn/hsn-29310041/"
---

# HSN Code 29310041: Phosphonic acid,ethyl

- [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 2931: Other organo-inorganic compounds](https://busy.in/hsn/sub-chapter-2931/)

## GST rates

| Description | CGST | SGST | IGST | CESS |
| --- | --- | --- | --- | --- |
| Phosphonic acid,methyl - | 9% | 9% | 18% | 0% |

## Frequently asked questions

### What products are classified under HSN 29310041 ?

It includes Dimethyl propylphosphonate

### How much GST applies to Phosphonic acid,ethyl?

Under HSN 29310041, Phosphonic acid,ethyl attracts Varies when sold in taxable form. Describe the exact form on the invoice.

### Can we claim ITC on inputs used to trade Phosphonic acid,ethyl?

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

### How should mixed supplies be billed when Phosphonic acid,ethyl is sold with other items?

Use separate invoice lines per HSN and apply the correct rate per line (e.g., Varies for Phosphonic acid,ethyl; Nil for exempt items if applicable).

### Does packaging or labelling change the GST for Phosphonic acid,ethyl?

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 Phosphonic acid,ethyl?

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