Orange, crystal. There are three kinds of variant A, B and C. It is stable Variant A at normal temperature; Variant C at temperature of 269ºC and enlarged 52% at same volume; When cooling, it becomes variant B and heated to 255ºC, it will be variant C again, at same time, its volume reduce 0.1%.
It is not deliquesces in air, not dissolved in alcohol; it can be dissolved in water. It is noxious, strong oxidant; when mixed with organics, it will catch fire.
Usage：
It is used in the manufacturing of Chromic Green, Chromic alum, matches, explosive, printing ink, electrode, enamel; it is also used as oxidant in dye printing and synthetic perfume industry.
Specification：
Grade
Index name
Excellent
grade
1
st
·grade
Common
grade
N.W.(Kg)
Potassium dichromate (K2Cr2O7) %≥
99.7
99.5
99.0
100
Chloride (Cl)%≤
0.05
0.05
0.08
50
Water-insoluble substance %≤
0.02
0.03
0.05
Packing and Caution:
Packed in plastic wearing bag closed steel drums or with soft packing. Do not mix with organics and subject it to moisture under normal transit and storage condition.
Keep away from flammable material, it is noxious, strong oxidant.
