GB/T 36700.3-2018 in English
VALIDChemicals—Guidance on hazard classification to the aquatic environment—Part 3:Aquatic toxicity
- Issued on:2018-09-17
- Implemented on:2019-04-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
《GB/T 36700.3-2018化学品 水生环境危害分类指导 第3部分：水生毒性》由TC251（全国危险化学品管理标准化技术委员会）归口，主管部门为国家标准化管理委员会。
Introduction
1. Background of standard formulation and analysis of technological evolution
GB/T 36700.3—2018 is an important part of the guidance on the classification of aquatic environmental hazards of chemicals. Its formulation background is mainly due to the growing global concern about the environmental risks of chemicals. With the acceleration of industrialization, the harm caused by chemicals in the environment has become more and more significant, especially in aquatic ecosystems.
2. Comparison of standard frameworks
| Standard dimensions | GB/T 36700.3 | OEC |
|---|---|---|
| Acute toxicity test method | GB/T27861 or equivalent criteria (96h LC50 for fish), GB/T21830 (48h EC50 for crustaceans) and GB/T 21805 (72h or 96h EC50 for algae) are used. | OECD NO.11 compiles relevant test methods and provides more appropriate test methods. |
| Chronic toxicity assessment | Use data obtained from GB/T 21854, GB/T21828 or GB/T 21805, or other valid internationally recognized test methods to generate data. | OEC |
| Data quality and weighting | Prioritize the use of data that conforms to OECD test guidelines or GLP laboratories to ensure the reliability and consistency of classification results. | QSAR prediction data is used as a supplement when there is no test data. |
3. Handling of Difficult Substances and Mixtures
Difficult substances refer to substances that are difficult to test in aquatic systems, usually due to poor solubility, high volatility or rapid degradation.
For example, some chemicals that are extremely difficult to dissolve in water may require expert judgment to determine their toxicity level. In this case, if the measured acute toxicity value is less than 1 mg/L, it can be classified as acute category 1; if it is greater than 1 mg/L, it needs to be handled with caution and comprehensively evaluated in combination with other data.
4. Implementation Recommendations
- Preferentially use standardized test methods: such as GB/T27861 (acute toxicity to fish) and the recommended methods of OECD NO.11 to ensure consistency and comparability of experimental results.
- For difficult substances, it is recommended to adopt the WSF or WAF test method and strictly control the conditions during the test to avoid data deviation due to degradation or other physical and chemical factors.
- Data quality assessment: For data from unknown sources, expert judgment is required to ensure its validity and applicability. High-quality data that meets GLP standards should be given priority for classification.
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