---
title: "HSN Code for Hydrocyanic Acid (Hydrogen Cyanide) | HSN 27131200 GST Rate"
description: "Find HSN and GST Rates for 27131200 related to Hydrocyanic Acid (Hydrogen Cyanide) with BUSY Accounting - The reliable source for HSN and GST details in India."
canonical: "https://busy.in/hsn/hsn-27131200/"
---

# HSN Code 27131200: Hydrocyanic Acid (Hydrogen Cyanide)

- [Section 05: Guide to HSN Section 05](https://busy.in/hsn/section-05/)
- [Chapter 27: Bituminous Substances, Mineral fuel & Oils](https://busy.in/hsn/chapter-27/)
- [Sub-chapter 2713: Petroleum residues & bitumen](https://busy.in/hsn/sub-chapter-2713/)

## GST rates

| Description | CGST | SGST | IGST | CESS |
| --- | --- | --- | --- | --- |
| Petroleum coke, petroleum bitumen and other residues of petroleum oils or of oils obtained from bituminous minerals - petroleum coke: calcined | 9% | 9% | 18% | 0% |

## Frequently asked questions

### What products are classified under HSN 27131200 ?

It includes Mercuric Sulphate: Other Sulphates

### How much GST applies to Hydrocyanic Acid (Hydrogen Cyanide)?

Under HSN 27131200, Hydrocyanic Acid (Hydrogen Cyanide) attracts Varies when sold in taxable form. Describe the exact form on the invoice.

### Does packaging or labelling change the GST for Hydrocyanic Acid (Hydrogen Cyanide)?

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 should mixed supplies be billed when Hydrocyanic Acid (Hydrogen Cyanide) is sold with other items?

Use separate invoice lines per HSN and apply the correct rate per line (e.g., Varies for Hydrocyanic Acid (Hydrogen Cyanide); Nil for exempt items if applicable).

### Do e‑way bill and e‑invoice apply for Hydrocyanic Acid (Hydrogen Cyanide)?

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.

### Any common misclassification issue with Hydrocyanic Acid (Hydrogen Cyanide)?

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 Hydrocyanic Acid (Hydrogen Cyanide)?

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