News Details

On 9 February 2026, the Bureau of Indian Standards (BIS), through its Inorganic Chemicals Sectional Committee (CHD 1), issued a Wide Circulation Draft (CHD 1 (33341)) revising the Indian Standard titled “Specification for ammonium sulphate, technical”. Stakeholders and interested parties are invited to submit their comments and suggestions for improvement, with the last date for submission being 10 April 2026. 

Background 

First published in 1988, this standard specifies the requirements for technical-grade ammonium sulphate used i water treatment, in the treatment of hides and skins (leather processing), and in the manufacture of explosives and ammunition. 

Scope of the Standard 

The revised standard prescribes: 

• Requirements for ammonium sulphate, technical grade 

• Methods of sampling and testing 

The material covered under this standard is classified into the following three types: 

• Type 1 - For leather processing 

• Type 2 - For water treatment 

• Type 3 - For explosives and ammunition 

The material shall also comply with the requirements in the table below, 

Key Changes Incorporated in the Revision 

The following key modifications have been introduced: 

• Instrumental test methods for the determination of iron and arsenic have been incorporated in the revision to enhance the accuracy, reliability, and alignment with modern laboratory practices. 

• A dedicated reference clause has been added to improve clarity and ensure better harmonization with related standards. 

• The packing and marking provisions have been updated in the revision to ensure better compliance and traceability. 

Comments on the draft should be submitted in the prescribed template via the BIS portal. In case no comments are received by the deadline, approval will be presumed.