Soda Ash
>
> It most commonly occurs as a crystalhydrate, which readily
> effloresces to form a white powder, the monohydrate. Pure sodium
> carbonate is a white, odorless powder that is hygroscopic It has a
> strongly alkae, and forms a moderately basic solution in
> water. Sodium carbonate is well known domestically for its everyday
> use as a water softener.
>
>
> Na2CO3 99.2% Min
> Na2O 58% Min
> Na Cl 0.2% Max
> SO4 0.135% Max
> Insoluble in water 0.05% Max
