Molecular Formula: Na2CO3
Molecular Weight: 105.99
Technical Specification: GB 210-92
Properties: White powder or granular crystal. It has a astringent taste. The relative density is 2.532 (at 25 ℃). The melting point is 851 ℃. It dissolves in water easily and the maximum solubility at 35.4 ℃ is 49.7 g sodium carbonate per 100 g water. It can slightly soluble in ethanol but insoluble in alcohol.
Applications: The manufacture of glass is one of the most important uses of sodium carbonate. Sodium carbonate is also used as a relatively strong base in various settings. In chemistry, it is often used as an electrolyte. In domestic use, it is used as a water softener during laundry. It effectively removes oil, grease, and alcohol stains. Sodium carbonate is also used as a descaling agent in boilers. In dyeing with fiber-reactive dyes, sodium carbonate is used to ensure proper chemical bonding of the dye with the fibers, typically before dyeing, mixed with the dye, or after dyeing. Sodium carbonate is used by the brick industry as a wetting agent to reduce the amount of water needed to extrude the clay. Sodium carbonate is used in toothpastes, where it acts as a foaming agent, an abrasive, and to temporarily increase mouth pH.
Speification:|
Item
|
Index
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I Class
|
II Class
|
III Class
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High-Class
|
High-Class
|
First-Class
|
Acceptable
|
High-Class
|
First-Class
|
Acceptable
|
|
|
Total Alkali Content (As Na2CO3 min%)
|
99.2
|
99.2
|
98.8
|
98.0
|
99.1
|
98.8
|
98.0
|
|
Chloride Content (As NaCl max%)
|
0.50
|
0.70
|
0.90
|
1.20
|
0.70
|
0.90
|
1.20
|
|
Fe (max%)
|
0.004
|
0.004
|
0.006
|
0.010
|
0.004
|
0.006
|
0.010
|
|
Sulfate (As SO4 2- max%)
|
0.03
|
0.03
|
-
|
-
|
-
|
-
|
-
|
|
Water Insoluble Matter (max%)
|
0.04
|
0.04
|
0.10
|
0.15
|
0.04
|
0.10
|
0.15
|
|
Loss On Ignition (max%)
|
0.8
|
0.8
|
1.0
|
1.3
|
0.8
|
1.0
|
1.3
|
|
Bulk Density (min%)
|
0.85
|
0.90
|
0.90
|
0.90
|
0.90
|
0.90
|
0.90
|
|
Fineness 180 μm Sieving Residue (min%)
|
75.0
|
70.0
|
65.0
|
60.0
|
70.0
|
65.0
|
60.0
|