碳酸钠

Sodium carbonate is commonly used as an inorganic base and a buffer component in several synthetic organic transformations in both chemical industries and research laboratories. Often used as an electrolyte, sodium carbonate acts as a very good conductor in the process of electrolysis. Apart from being used as a common chemical/biological/biotechnological laboratory reagent, it is also used as a water softener in laundering, processing wood pulp, cleaners, and making glass. It can be used for standardization of acids, and qualitative testing of cations. In dyeing with fiber-reactive dyes, sodium carbonate is used to ensure proper chemical bonding of the dye with cellulose fibers.

m.p. 851° (begins to lose CO{2} at 400°). For use as an alkalimetric standard, material should be heated at 285° for 2 hrs.It is hygroscopic in nature, and absorbs moisture from air. On heating, it begins to lose carbon dioxide at about 400 °C.

MFCD00003494

207-838-8

Na₂CO₃

105.99

2.53

1.535

Hygroscopic. Ambient temperatures.

Granular

Soluble in water. Slightly soluble in aq. alcohol. Insoluble in carbon disulphide, acetone, and alkyl acetates.

4154566

14,8596

36
Irritating to eyes.

Maximum level of impurities: Insoluble matter 0.01%, Loss on drying at 285� 1.0%, Cl 0.001%, Nitrogen compounds (as N) 0.001%, PO₄ 0.001%, SiO₂ 0.005%, Sulfur compounds (as SO₄) 0.003%, Ammonium hyrdoxide precipitate 0.01%, Ca 0.02%, Mg 0.004%, Heavy Metals (as Pb) 5ppm, Fe 5ppm, K 0.005%

22-26
Do not breathe dust.In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

VZ4050000

是

 

H319
Causes serious eye irritation.

P280i-P264-P305+P351+P338-P337+P313
Wear eye/face protection.Wash thoroughly after handling.IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.If eye irritation persists: Get medical advice/attention.