Home / Standards / GB 11522-1989 GB 11522-1989 Abolished Hygienic standard for titanium dioxide dust in the air of workplace 车间空气中二氧化钛粉尘卫生标准 Standard Type GB ICS 13.040.30 CCS C52 Status 废止 Issue Date 1989-03-29 Implementation 1990-02-01 Responsible Dept 国家卫生健康委 Drafting Unit N/A