GB23557-2009
Methomyl emulsifiable concentrates
灭多威乳油
GB 23557-2009 is a current mandatory Chinese national standard for Methomyl emulsifiable concentrates. It appears in the Food compliance cluster with a product safety focus and has an implementation date of Nov 1, 2009.
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 applies to methomyl emulsifiable concentrates formulated by dissolving methomyl technical concentrate with emulsifiers in suitable solvents. It covers the requirements, testing methods, and labeling for these pesticide formulations. This standard is mandatory for all manufacturers of methomyl emulsifiable concentrates in China.
Technical requirements
The standard specifies the composition and appearance requirements, requiring the product to be a homogeneous oily liquid without visible suspended matter or precipitates. It defines technical indicators for two concentrations: 20% and 40% methomyl emulsifiable concentrates. Key parameters include the active ingredient mass fraction, water content, and pH value range. The standard also mandates compliance with emulsion stability, low-temperature stability, and thermal storage stability requirements. Manufacturers must ensure the active ingredient remains at least 95% of the pre-storage value after thermal stability testing.
Testing methods
Testing involves High-Performance Liquid Chromatography (HPLC) with a UV detector for identifying and determining the methomyl mass fraction. Other tests include the Karl Fischer method for water content, pH measurement, and specific procedures for emulsion, low-temperature, and thermal stability as referenced in GB/T 1600, GB/T 1601, GB/T 1603, GB/T 19136, and GB/T 19137.
FAQs
What products are regulated under GB 23557-2009?
GB 23557-2009 regulates methomyl emulsifiable concentrates, specifically the 20% and 40% formulations used as insecticides.
Are there any mandatory chapters in GB 23557-2009?
Yes, Chapter 3 (Requirements) and Chapter 5 (Labeling, Packaging, Storage, and Transport) are mandatory, while the remaining chapters are recommended.
What is the shelf life or guarantee period specified in the standard?
Under specified storage and transport conditions, the guarantee period for methomyl emulsifiable concentrates is 2 years from the date of manufacture.
The summary above provides a high-level overview of GB 23557-2009. 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 23557-2009 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Product
- CCS
- G25
- ICS
- 65.100.10
- Competent department
- Ministry of Agriculture and Rural Affairs
- Technical committee
- Ministry of Agriculture and Rural Affairs