The Department of Chemicals and Petrochemicals has extended the enforcement dates for Quality Control Orders (QCOs) for three chemicals: H Acid (CAS No: 90-20-0), K Acid (Cas No: 118-03-6), and Vinyl Sulphone (CAS No: 16071-86-6). The updated dates were announced in a notification published in the Gazette of India on 14 May 2025, in consultation with Bureau of Indian Standards (BIS). The QCOs were originally published on 14 November 2024.  

Chemicals and revised enforcement dates:    

The Quality Control Order mandates that the concerned substances carry the certification mark of the Bureau of Indian Standards, ensuring that the existing rules remain in force until the implementation of the new QCOs.