The Bureau of Indian Standards (BIS), under a notification dated October 6th 2025 (Ref: HQ-PUB013/1/2020-PUB-BIS (1337)), has established 10 new Indian Standards, with effective dates from 23 September 2025. These standards span diverse domains such as paints and pigments, chemical safety, chlorine tablets, and radiation monitoring in nuclear and medical facilities.
These standards replace older versions in several cases and introduce new regulatory benchmarks in public safety and industrial processes.
📋 Summary of New Indian Standards
| Sl. No. | Standard Number & Title | Effective From | Superseded Standard | Withdrawal Date |
| 1 | IS 55:2025 – Ultramarine Blue for Paints – Specification (2nd Rev) | 23 Sept 2025 | IS 55:1970 | 23 Mar 2026 |
| 2 | IS 56:2025 – Prussian Blue (Iron Blue) for Paints – Spec. (3rd Rev) | 23 Sept 2025 | IS 56:1993 | 23 Mar 2026 |
| 3 | IS 4644 (Part 1):2025 – BTX Code of Safety: Benzene (1st Rev) | 23 Sept 2025 | IS 4644:1968 | 23 Mar 2026 |
| 4 | IS 4644 (Part 2):2025 – BTX Code of Safety: Toluene (1st Rev) | 23 Sept 2025 | IS 4644:1968 | 23 Mar 2026 |
| 5 | IS 4644 (Part 3):2025 – BTX Code of Safety: Xylene (1st Rev) | 23 Sept 2025 | IS 4644:1968 | 23 Mar 2026 |
| 6 | IS 9825:2025 – Chlorine Tablets – Specification (3rd Rev) | 23 Sept 2025 | IS 9825:2003 | 23 Mar 2026 |
| 7 | IS 19378:2025 – Base Paper for Sublimation Coating – Spec. | 23 Sept 2025 | NA | NA |
| 8 | IS 19389:2025 / ISO 16640:2021 – Monitoring Radioactive Gases in PET Radiopharmaceutical Facilities | 23 Sept 2025 | NA | NA |
| 9 | IS 19390:2025 / ISO 19017:2015 – Gamma Spectrometry for Radioactive Waste | 23 Sept 2025 | NA | NA |
| 10 | IS 19392:2025 / ISO 8690:2024 – Ease of Decontamination – Surface Materials (Gamma/Beta Radionuclides) | 23 Sept 2025 | NA | NA |
🔍 Key Highlights
🎨 Paints and Pigments
- Updated specifications for Ultramarine Blue and Prussian Blue ensure improved color consistency, safety, and eco-compliance for paint manufacturers.
🧪 BTX Chemicals
- Safety codes for Benzene, Toluene, and Xylene now split into individual parts, modernizing the decades-old IS 4644:1968 and aligning with chemical safety regulations.
💊 Chlorine Tablets
- The revision to IS 9825 enhances quality standards for disinfection tablets used in public health, water treatment, and sanitation programs.
☢️ Radioactivity Monitoring
- Three new standards (IS 19389, IS 19390, IS 19392) based on ISO norms cover:
- Monitoring radioactive gases in PET facilities
- Gamma spectrometry for waste analysis
- Testing the ease of surface decontamination for radionuclides
📌 Implications
| Stakeholder | Action Required |
| Paint & Coating Industry | Align product formulations with new pigment specifications |
| Chemical Industry (BTX Users) | Update safety protocols and storage procedures |
| Public Health Agencies | Adopt updated chlorine tablet specs for disinfection |
| Radiation Facilities (Nuclear & Medical) | Implement new measurement and safety procedures as per ISO-adopted standards |
📆 Important Dates
- New Standards Effective: 23 September 2025
- Withdrawal of Previous Versions: 23 March 2026 (where applicable)
📢 Conclusion
These new BIS standards mark a significant modernization in India’s regulatory framework, especially in the areas of industrial safety, public health, and nuclear monitoring. Stakeholders are encouraged to transition to the new standards promptly to ensure compliance and operational safety.