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langfang tianke biotechnology
professional production base of general chemical reagent and pharmaceutical accessories
hotline: 86-15076659665
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zinc sulphate

molecular formula: znso4·7h2o
molecular weight: 287.54
cas no:7733-02-0
properties: colorless crystal. relative density is 1.957. easily soluble in water, insoluble in ethyl alcohol.
uses: analytical reagent, mordant, electronic component production and pharmaceutical industry.
standard: maximum assay of impurities is in %

specification/item

analytically pure-ar

chemically pure-cp

high pure

assay

≥99.5

≥99.0

≥99

clarity test

qualified

qualified

ph value

4.4-6.0

4.4-6.0

4.4-6.0

water insoluble matter

≤0.01

≤0.01

≤0.02

chloride (cl)

≤0.0005

≤0.002

≤0.05

total nitrogen (n)

≤0.001

≤0.002

≤0.05

arsenic (as)

≤0.00005

≤0.0002

≤0.0002

manganese (mn)

≤0.0003

≤0.001

-

iron (fe)

≤0.0005

≤0.002

≤0.002

copper (cu)

≤0.001

≤0.005

-

cadmium (cd)

≤0.0005

≤0.002

-

lead (pb)

≤0.001

≤0.01

≤0.01

non-sludging to ammonium sulfide (as sulfate)

≤0.05

≤0.02

≤0.05

packing: woven bag lined with plastic bag, kraft paper bag, or fiber drum, net weight is 25kg.

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langfang tianke biotechnology co., ltd.
add: sanghang industrial park, dacheng county,
hebei, china
tel: 86-15076659665 manager ma
fax: 86-316-5569332 
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