molecular formula: nahco3
molecular weight: 84.01
properties: white crystalline powder. relative density is 2.20. it breaks up at about 50℃ and turns into sodium carbonate at 100℃. soluble in water and slightly soluble in ethyl alcohol.
uses: as analytical reagent and buffer agent. it can be used in organic synthesis and pharmaceutical industry.
standard: the maximum content of impurities is in percentage content
standard/item |
analytical pure-ar
|
chemical pure-cp
|
assay
|
≥99.8
|
≥99.8
|
clarity test
|
qualified
|
qualified
|
water insoluble matter
|
≤0.01
|
≤0.02
|
chloride and chlorate (cl)
|
≤0.002
|
≤0.005
|
sulfur compound (so4)
|
≤0.005
|
≤0.01
|
nitrogen compound (n)
|
≤0.001
|
≤0.002
|
phosphate (po4)
|
≤0.002
|
≤0.005
|
silicate (sio3)
|
≤0.005
|
≤0.01
|
magnesium (mg)
|
≤0.003
|
≤0.005
|
potassium (k)
|
≤0.01
|
≤0.02
|
aluminium (al)
|
≤0.01
|
≤0.02
|
calcium (ca)
|
≤0.007
|
≤0.01
|
iron (fe)
|
≤0.001
|
≤0.002
|
heavy metal (pb)
|
≤0.001
|
≤0.002
|
packing: woven bag, kraft bag or fiber drum lined with plastic, net weight is 25kg.
|