molecular formula: na2co3
molecular weight: 105.99
cas no:497-19-8
properties: white powder. relative density is 2.532. breaks down at 400℃. melting point is 851℃. easily soluble in water, insoluble in ethyl alcohol.
uses: as analytical reagent and standard reagent. in preparing sodium salts, soda glasses, optical glasses, and etc.
standard:
standard/item |
analytical pure-ar
|
chemical pure-cp
|
assay(na2co3) /%
|
≥99.8
|
≥99.8
|
clarity test
|
qualified
|
qualified
|
water insoluble matter
|
≤0.01
|
≤0.02
|
drying loss
|
≤1.0
|
≤1.0
|
chloride(cl)
|
≤0.002
|
≤0.005
|
sulfur compound(so4)
|
≤0.005
|
≤0.01
|
nitrogen compound(n)
|
≤0.001
|
≤0.002
|
phosphate and silicate(sio3)
|
≤0.006
|
≤0.013
|
magnesium (mg)
|
≤0.002
|
≤0.005
|
aluminium (al)
|
≤0.003
|
≤0.01
|
potassium (k)
|
≤0.005
|
≤0.02
|
calcium (ca)
|
≤0.01
|
≤0.02
|
iron (fe)
|
≤0.0005
|
≤0.001
|
heavy metal(pb)
|
≤0.0005
|
≤0.001
|
packing: woven bag, kraft bag or fiber drum lined with plastic, net weight is 25kg.
|