
质量标准: Quality standard:
中国卫生部94部颁标准 STANDARD OF THE HEALTH MINISTRY OF CHINA(94)
性状:白色或类白色粉末 DESCRIPTION: A WHITE CRYSTALLINE POWDER
熔点:151-154℃ MELTING POINT: 151-154℃
溶液外观:无色透明 SOLUTION CLEARLY: CLEAR
干燥失重:≤0.5% LOSS ON DRYING: ≤0.5%
炽灼残渣:≤0.1% RESIDUE ON IGNITION:≤0.1%
重金属:≤20 ppm HEAVY METALS: ≤20 ppm
酸度:5.0 - 7.0 PH: 5.0 - 7.0
含量:≥ 99.0% ASSAY: ≥ 99.0%