无水亚硫酸钠

无水亚硫酸钠(Sodium sulfite anhydrous)

项目(Item)

分析纯(A.R.)

化学纯(C.P.)

含量(Assay)(Na2SO3)/%

≥97.0

≥95.0

澄清度试验(Clarity Test)

合格(Qualified)

合格(Qualified)

水不溶物(Water Insolubles)/%

≤0.005

≤0.01

氯化物(Chlorides)(Cl)/%

≤0.005

≤0.02

酸性亚硫酸盐含量(Acid Sulphites)

合格(Qualified)

合格（Qualified）

游离碱(Free Alkali)(As Na2CO3)/%

≤0.1

≤0.3

硫代硫酸盐(Thiosulphates)(As S2O3)/%

≤0.01

≤0.02

铁(Iron)(Fe)/%

≤0.0005

≤0.002

重金属(Heavy Metal)(As Pb)/%

≤0.001

≤0.002

砷(Arsenic)(As)/%

≤0.0001

≤0.0005