GB28931-2024
Hygienic requirements for chlorine dioxide disinfectant generator
二氧化氯消毒剂发生器卫生要求
GB 28931-2024 is a current mandatory Chinese national standard for Hygienic requirements for chlorine dioxide disinfectant generator. It appears in the Food compliance cluster with a product safety focus and has an implementation date of Jul 1, 2025.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard specifies the hygienic requirements for chlorine dioxide disinfectant generators produced via chemical reactions. It applies to chemical-based chlorine dioxide generators designed for disinfecting water, air, object surfaces, and medical instruments. It does not apply to non-chemical generators or other types of disinfection equipment. Manufacturers must ensure their products meet these mandatory specifications before entering the Chinese market.
Technical requirements
The standard outlines raw material requirements, specifying that chemical reagents (such as hydrochloric acid, sodium chlorate, and sodium chlorite) must comply with corresponding Chinese national standards to ensure hygienic safety. It details generator structure and safety requirements, mandating systems for raw material supply, heating, reaction, absorption, measurement control, and safety. The equipment must feature automatic protection and alarm shutdown functions in case of failure. Generators used for drinking water disinfection must have a gas-liquid separation function. The standard specifies technical indicators, including output fluctuation ranges, chlorine dioxide purity (which must be ≥90% for pure generators), yield rates, and physicochemical parameters (such as pH value and appearance). It also outlines drinking water disinfection control methods for varying flow conditions. It establishes disinfection efficacy requirements for various applications, including drinking water, air, and medical instruments. Microbial kill rates must meet specific log values or kill rates, referencing standards like GB 27948 and GB 27952 for specific disinfection targets.
Testing methods
The standard outlines procedures for evaluating disinfection efficacy and determining chlorine dioxide content. Appendix B provides two normative methods for chlorine dioxide content determination: the UV-Vis spectrophotometry method (measuring absorbance at 430 nm) and the five-step iodometric method. Testing for specific disinfection targets references established protocols such as WS/T 10009 and the Hygienic Safety Evaluation Specification for Drinking Water Disinfectants.
FAQs
What products are regulated under GB 28931-2024?
It applies to chlorine dioxide disinfectant generators that produce the disinfectant via chemical reactions, commonly used for water, air, and surface disinfection.
When is the implementation date for GB 28931-2024?
The standard was issued on June 25, 2024, and will be implemented on July 1, 2025. Products manufactured before this date that comply with the previous version can be sold until their expiration date.
How does the standard address drinking water disinfection?
It requires generators used for drinking water to have a gas-liquid separation function and mandates strict compliance with GB 5749 for microbial indicators, chlorine dioxide residual, and byproduct limits.
The summary above provides a high-level overview of GB 28931-2024. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 28931-2024 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Health and hygiene
- CCS
- C59
- ICS
- 11.080
- Competent department
- National Disease Control and Prevention Administration
- Technical committee
- National Disease Control and Prevention Administration
Relationships
Replaces:GB 28931-2012