Home / Standards / GB/T 30921.6-2025 GB/T 30921.6-2025 Upcoming Test methods of purified terephthalic acid (PTA) for industrial use—Part 6:Determination of particle size distribution 工业用精对苯二甲酸(PTA)试验方法 第6部分:粒度分布的测定 Standard Type GBT ICS 71.080.40 CCS G16 Status 即将实施 Issue Date 2025-12-02 Implementation 2026-07-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A