ISI certification for CAUSTIC SODA is now mandatory under the Indian Standard as per IS252:2013. The Ministry of Chemicals and Fertilizers has notified mandatory BIS certification for Caustic soda under the Gazette of India. To know more about Indian standard of caustic soda please visit www.alephindia.in. You may mail us at info@alephindia.in. Reach us on call +91-9821120166.