molecular formula: nh4cl
molecular weight: 53.49
cas no: 12125-02-9
properties: colorless cubic crystal or white crystal with salty and slightly bitter taste. relative density is 1.527. soluble in water and grycerin, slightly soluble in ethyl alcohol.
uses: in analytical reagent, welding of metals, electroplating, tanning, dry battery, and etc.
standard: maximum assay of impurities is in %
specification/item |
analytically pure-ar
|
chemically pure-cp
|
high pure
|
assay (nh4cl) /%
|
≥99.5
|
≥98.5
|
≥99.0
|
ph(50g/l solution 25℃)
|
4.5~5.5
|
4.5~5.5
|
-
|
clarity test
|
qualified
|
qualified
|
-
|
water insoluble matter
|
≤0.005
|
≤0.01
|
-
|
ignition residue (as sulfate)
|
≤0.02
|
≤0.05
|
≤ 0.1
|
sulfate (so4)
|
≤0.005
|
≤0.005
|
≤ 0.02
|
phosphate (po4)
|
≤0.0005
|
≤0.001
|
≤0.005
|
sodium (na)
|
≤0.005
|
-
|
-
|
magnesium (mg)
|
≤0.001
|
≤0.002
|
-
|
potassium (k)
|
≤0.005
|
-
|
-
|
calcium (ca)
|
≤0.001
|
≤0.002
|
≤0.005
|
iron (fe)
|
≤0.0005
|
≤0.001
|
≤0.005
|
heavy metal (pb)
|
-
|
-
|
≤0.001
|
arsenic (as)
|
-
|
-
|
≤0.0005
|
drying loss
|
-
|
-
|
≤0.5
|
packing: woven bag lined with plastic bag, kraft bag and fiber drum, net weight is 25kg.
|