Sodium phosphate 2 hydrate [13472-35-0] Sodium phosphate is used as an acidity regulator and sequestrant in food. It is used as a pH buffer (baking powders, fleet enema solution, galvanic baths and acid cleaners), emulsifier, laboratory reagent, metal phosphating reagent and auxiliary dye / fabric printing. It is also used to treat boiled water and wastewater and to remove halogens from waste gases.
Density: 1.915 g / cm3 (20 ° C)
Melting point: 60 ° C
PH value: 4.5 (12 g / l, H₂O, 25 ° C)
Bulk density: 1000 kg / m3
Solubility: 850 g / l
In water insoluble material (calculated on the dry substance): ≤ 0.15%
PH value (1%, water): 4.1 – 5.0
PH value (5%; water): 4.2 – 4.5
Chloride (Cl): ≤ 0.0005%
Fluoride (F): ≤ 0.001%
Total nitrogen (as N): ≤ 0.001%
Hydrogen phosphate (HPO₄): ≤0.5%
Labeling of hazardous chemicals and mixtures that are part of the Globally Harmonized System of Classification and Labeling of Chemicals (GHS). The pictograms recommended by GHS have the shape of a square set on the top. They should contain a black symbol on a white background with a red border.
Priority rules to be observed in connection with the labeling of a substance:
– the skull and crossbones, the exclamation mark pictogram should not be added.
– corrosive effect, the exclamation mark pictogram should not be added if it concerns eye or skin irritation.
– health hazard determining respiratory sensitization, the exclamation mark pictogram should not be added if it concerns skin sensitization or irritation to eyes or skin.
Source: GHS pictograms