On 28 July 2026, the Bureau of Indian Standards (BIS), through its Chemical Hazards Sectional Committee (CHD 7), issued a wide circulation draft for the revision of the standard titled “Stable Bleaching Powder Code of Safety (First Revision)”. The draft document CHD 7 (34506) WC, which revises IS 15738:2007, has been circulated to stakeholders for review and feedback, with comments invited until 11 September 2026.
Background
Stable bleaching powder (SBP), Calcium hypochlorite CAS 7778-54-3, is a white or nearly white powder made by reacting slaked lime with chlorine gas. It is widely used as a bleaching agent, disinfectant, and for water purification, including the treatment of drinking water and swimming pools.
Scope
This standard outlines the properties of stable bleaching powder (SBP) and the hazards associated with its use. It also provides guidance on safe storage, handling, packing, labelling, disposal, protective equipment, personnel training, and first aid. It does not cover the design specifications for buildings, plants, storage vessels, or waste disposal systems.
Key Highlights of the Draft Standard
- Chemical Hazards: SBP is a strong oxidizing agent that can release toxic chlorine gas and intensify fires when exposed to heat, moisture, or incompatible materials.
- Health & Safety: The draft highlights risk of burns, eye and respiratory injuries, and mandates the use of appropriate PPE.
- Storage & Transport: It prescribes safe storage, handling, labelling, and transportation practices, including emergency preparedness and driver training.
- Spill & Waste Management: Spilled SBP should be isolated, kept away from water, acids, and combustible materials, cleaned using protective equipment, and disposed of safely to prevent chlorine release.
- Fire Safety: Although non-combustible, SBP is a strong oxidizer that can intensify fires. The draft recommends water as the preferred extinguishing agent, emergency response plans, and regular mock drills.
- Training & Emergency Response: Workers should receive training on safe handling, PPE use, emergency procedures, first aid, and fire-fighting, with periodic refresher training.
- Health & First Aid: The draft prescribes immediate first aid for inhalation, ingestion, skin, and eye exposure, along with prompt medical attention and regular health monitoring of personnel handling SBP.
