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Chemical reagent
Sodium Carbonate

Product name

Sodium carbonate

Specification

Reagent grade

Molecular formula

Na2CO3

CAS

497-19-8

H.S. CODE

2836200000

Molecular weight

105.99

Appearance

White granule powder

Package

25KG Woven bags or fiber drums

Property

   Water insoluble, white powder or small particles. Has the water absorbability, absorbs moisture in the air gradually becoming a hydrate. The relative density 2.532. 400 ℃ start decomposing. Melting point 851 ℃, soluble in water, soluble in alcohol.

Application

    Analytics reagents, such as make reference reagent, sample dissolution fire-resistant and precipitation agent, the slow granule, emission spectral analysis sample volatilize. Also used in the preparation of sodium salt, sodium glass and film print wash.

Test standardGB/T 639-2008


Test items

Specification

AR grade

CP grade

Appearance

White powder

White powder

Assay

99.8%

99.8%

Appearance of solution

Conform

Conform

Water insoluble

0.01%

0.02%

Residue on ignition

1.0%

1.0%

Chloride

0.002%

0.005%

Sulfide

0.005%

0.01%

Total nitrogen

0.001%

0.002%

Phosphate and silicate

0.006%

0.013%

Magnesium

0.002%

0.005%

Aluminium

0.003%

0.01%

Potassium

0.005%

0.02%

Calcium

0.01%

0.02%

Iron

0.0005%

0.001%

Heavy metals

0.0005%

0.001%

Storage

    Store in a cool, dry and well ventilated place. Keep away from incompatible substances. Keep container closed.


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