Overview
EN 12932:2015 - Chemicals used for treatment of water intended for human consumption - Chemicals for emergency use - Sodium dichloroisocyanurate, dihydrate (CEN) specifies the identity, characteristics, quality requirements and test methods for sodium dichloroisocyanurate dihydrate when used for emergency treatment of drinking water. The standard describes chemical and physical properties (e.g., empirical formula C3N3O3Cl2Na·2H2O, relative molecular mass 256.02, CAS 51580‑86‑0), commercial form (white granular solid), and key handling, labelling, transportation and storage rules. It also includes informative and normative annexes on use, safety and analytical procedures.
Key topics and requirements
- Scope & use: Applicable specifically to emergency water treatment for human consumption; does not in itself grant national regulatory approval.
- Identification & properties: Chemical names, synonyms (troclosene sodium, dihydrate), bulk density (~0.9 g/cm3) and solubility (≈291 g/L at 25 °C) are defined.
- Purity and impurities: Requirements for main product composition and limits for relevant impurities and by‑products.
- Test methods & sampling: Standardised sampling (ISO-based methods) and analytical procedures, including determination of available chlorine (main active constituent) and methods for impurities (e.g., arsenic, antimony, selenium by hydride AAS as detailed in Annex C).
- Labelling, transport & storage: Labelling in accordance with current EU chemicals regulation, transportation rules, packaging/marking and storage best practices, including incompatibilities and long‑term stability considerations.
- Safety & emergency procedures: Normative Annex B covers safe handling, first aid, spill response and firefighting guidance for emergency responders and handlers.
- Normative references: Cross-references to EN 1233, EN ISO 12846, EN ISO 3696, ISO sampling standards and ISO 8288 for related analytical and sampling methods.
Practical applications
- Emergency disinfection of drinking water in natural disasters, flood relief, refugee camps and temporary supply systems.
- Rapid deployment kits and pre‑packaged granular disinfectants used by humanitarian organizations, civil protection, municipal water utilities and military field operations.
- Quality control and acceptance testing of sodium dichloroisocyanurate dihydrate batches by manufacturers and analytical laboratories.
Who should use this standard
- Water utilities, emergency response teams, public health authorities and NGOs involved in disaster‑response water supply.
- Chemical manufacturers and suppliers of emergency water treatment products.
- Testing and analytical laboratories performing conformity and safety testing.
- Regulators and procurement officers specifying product quality and safety in emergency kits.
Related standards
For procurement, compliance checks or technical implementation, refer to the full EN 12932:2015 document and national regulatory requirements before deployment.