---
title: "HSN Code for Phosphonic acid,methyl,dimethyl ester | HSN 29310052 GST Rate"
description: "Find HSN and GST Rates for 29310052 related to Phosphonic acid,methyl,dimethyl ester with BUSY Accounting - The reliable source for HSN and GST details in India."
canonical: "https://busy.in/hsn/hsn-29310052/"
---

# HSN Code 29310052: Phosphonic acid,methyl,dimethyl ester

- [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 acide,[methyl-bis (5-ethyl-2-methyl 2-oxido- 1,3,2-dioxaphosphorinan-5-yl) methyl] ester | 9% | 9% | 18% | 0% |

## Frequently asked questions

### What products are classified under HSN 29310052 ?

It includes Cartap hydrochloride (ISO)

### Any common misclassification issue with Phosphonic acid,methyl,dimethyl ester?

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

### Do e‑way bill and e‑invoice apply for Phosphonic acid,methyl,dimethyl ester?

e‑Way bill is needed above ₹50,000 consignment value (subject to exemptions). e‑Invoicing is turnover‑based (presently AATO > ₹5 crore) for B2B supplies.

### Can we claim ITC on inputs used to trade Phosphonic acid,methyl,dimethyl ester?

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,methyl,dimethyl ester is sold with other items?

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

### Does packaging or labelling change the GST for Phosphonic acid,methyl,dimethyl ester?

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.

### How much GST applies to Phosphonic acid,methyl,dimethyl ester?

Under HSN 29310052, Phosphonic acid,methyl,dimethyl ester attracts Varies when sold in taxable form. Describe the exact form on the invoice.