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        # Navigating BIS/ISI Certification for Chemical Raw Materials in India

        

**Topic:** Explainer

        

The Ministry of Chemicals and Fertilizers and the Bureau of Indian Standards (BIS) enforce statutory Quality Control Orders (QCO) across strategic chemicals and downstream plastics. While standards like **IS 14426:2021** (CPW) and finished-product mandates (such as IS 4985 lead-free pipes) enforce strict compliance, the statutory QCO for Polyvinyl Chloride (PVC) Homopolymers (**IS 17658:2021**) was officially **rescinded on November 12, 2025 via Gazette Notification S.O. 5139(E)**. Sourcing PVC resin with a mandatory ISI mark is no longer a legal requirement, though IS 17658:2021 remains the vital national technical benchmark for virgin resin quality and downstream compliance.

        
        
        
        
        
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          ## Frequently Asked Questions

          
### Is sourcing PVC resin with a BIS ISI mark legally mandatory?

No. The Ministry of Chemicals and Fertilizers officially rescinded the PVC Homopolymers (Quality Control) Order on November 12, 2025 (Gazette Notification S.O. 5139(E)), lifting the statutory mandate for compulsory BIS licensing on PVC resin. However, virgin resin must still meet IS 17658:2021 technical criteria if your finished product (e.g., pipes under IS 4985 or cables under IS 694) requires BIS ISI certification.

### How can I verify a foreign supplier's BIS license?

Obtain the 7-digit CM/L license number from the supplier and enter it into the official Bureau of Indian Standards (BIS) online portal to verify its validity and product scope.

### Are secondary plasticizers like CPW subject to QCO?

Yes. Chlorinated Paraffin Wax (CPW) must comply with IS 14426:2021 standards, restricting volatile content and ensuring chemical stability.

### Does NBT assist with BIS compliance audits?

Yes. NBT's technical team provides full trace documentation and BIS certificates for all supplied materials, helping compounders pass quality audits smoothly.

        
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By NBT Technical Desk · Updated 2026-07-04

        

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