指标名称

规格

优级纯GR

分析纯AR

化学纯CP

含量

≥98.%

≥98.0%

≥98%

PH

6.0~8.5

6.0~8.5

6.0~8.5

澄清度实验

≤6

≤4

≤6

水不溶物

≤0.02%

≤0.01%

≤0.02%

硫酸盐和亚硫酸盐

≤0.2%

≤0.2%

≤0.2%

硫化物

≤0.001%

≤0.0005%

≤0.001%

镁

≤0.005%

≤0.002%

≤0.005%

 钙

≤0.01%

≤0.004%

≤0.01%

铁

≤0.002%

≤0.001%

≤0.002%

重金属

≤0.002%

≤0.001%

≤0.002%