GB 31604.30-2025 Chinese PDF GB 17741-2025 GB 17681-2024_Chinese: Technical specification for

GB 17681-2024_Chinese: Technical specification for safety monitoring of major hazard installations for hazardous chemicals (Chinese: 危险化学品重大危险源安全监控技术规范)

20-2024_Chinese: Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides - Part 20: Determination of minor amounts of fluorine and chlorine in rare earth oxides - Ion chromatography method (Chinese: 稀土金属及其氧化物中非稀土杂质化学分析方法 第20部分：稀土氧化物中微量氟、氯的测定 离子色谱法)

62-2025_Chinese: National food safety standard - Food contact materials and products - Determination of migration and release of N-nitrosamines (Chinese: 食品安全国家标准 食品接触材料及制品 N-亚硝胺类化合物迁移量和释放量的测定)

English versions: GB 12158-2024

English versions: GB/T 11842-2025

GB 31604.30-2025 Chinese PDF GB 17741-2025 GB 17681-2024_Chinese: Technical specification forGB 31604. 30 2025_Chinese: National food safety standard Food contact materials and products Determination of phthalate esters and determination of migration (Chinese: ) Note Careful: Text of PDF is in Chinese (not English). Delivery (PDF in Chinese): 2 working hours typically, ASAP English versions: GB 31604. 30 2025