It is the sodium salt of carbonic acid. It is used as a water softener in laundering.Sodium carbonate is a food additive (E500) used as an acidity regulator, anti-caking agent, raising agent, and stabilizer.

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Melting Point : 318 C
Molecular Formula : NaOH
Usage : Industrial cleaning pH regulation synthesis of various chemicals
Properties : Highly corrosive hygroscopic and reacts exothermically with water
Smell : Odorless, Other
EINECS No : 2151855
Melting Point : 550C (decomposed)
Molecular Formula : Na2SiF6
Usage : Primarily as a fluoridation agent and in chemical manufacturing
Properties : Corrosive reacts with acids to release toxic gases
Smell : Other, Odorless
EINECS No : 2409348
Melting Point : Decomposes before melting
Molecular Formula : Na2H2P2O7
Usage : Used in baking powders canned seafood curing foods and other food applications
Properties : Acidic salt with buffering and chelating functions
Smell : Odorless, Other
EINECS No : 2318350
Melting Point : 64C (heptahydrate decomposes)
Molecular Formula : FeSO4
Usage : Reagent nutrient supplement and in industrial processes
Properties : Hygroscopic oxidizes over time when exposed to air
Smell : Other, Odorless
EINECS No : 2317535