Chemicals

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General Information

Washing Soda

Washing soda is easily mistaken for baking soda. Although the name looks the same, these two chemicals are not, althoug they are related.[1]

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Chemical & Physical Information

Trivial nameSoda
Chemical nameSodium carbonate
Other namesSoda (NL,BE)
Type of chemicalIonic compound (salt)
Chemical formulaNa2CO3
CAS number497-19-8 (anhydrous)
5968-11-6 (monohydrate)
Density2.532 g·cm-3
Molar mass105.99 g·mol-1
Melting point851 °C (anhydrous), 100 °C (monohydrate, decomposition), 34 °C (decahydrate, decomposition)
Boiling pointn/a
SolubleIn water
Solubility (water, 20 °C)214 g·L-1 Washing soda solubility graph.
Crystal systemOrthorhombic (monohydrate), monoclinic (decahydrate)
AppearanceWhite crystalline solid
ColourWhite
Safety summaryIrritating
Safety dataMSDS (monohydrate)
StorageDry
ExtraHygroscopic
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Photos

Washing Soda

(3 cm)

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Sources

[1] Wikipedia

[2] Specimen from my personal collection, photo taken by me.

[3] Mullin J.W. - Crystallization, 2001