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Disodium hydrogen phosphate
Specification | GB 1886-329-2021 | FCC VII | |
Content Na2HPO4,( On dry basis),w/%≥ | 98.0 | 98.0 | |
Arsenic(As),mg/kg ≤ | 3.0 | 3.0 | |
Heavy metal(as Pb),mg/kg ≤ | 10 | ——— | |
Lead(Pb),mg/kg ≤ | 4.0 | 4.0 | |
Fluorides(as F),mg/kg ≤ | 50.0 | 50.0 | |
Insoluble substances,w/% ≤ | 0.2 | 0.2 | |
Loss on drying,w/% | Na2HPO4≤ | 5.0 | 5.0 |
Na2HPO4·2H2O ≤ | 18.0-22.0 | 18.0-22.0 | |
Na2HPO4·12H2O ≤ | 61.0 | ——— | |
Dissodium hydrogen phosphate dodecahydrate （Na2HPO4.12H2O）
Item | Specification |
Appearance | White or colorless quicksand granular crystal |
Main content | ≥97.0% |
P₂O₅ | ≥19.2% |
pH (1% water solution) | 8.8-9.2 |
Fluoride (measured in F) | ≤0.05% |
Water insoluble | ≤0.10% |
1.Dual pH Buffer And Sequestrant: As Na2HPO4 it holds a mildly alkaline window of about pH 8.4 to 9.6 in 1% solution and binds calcium and magnesium ions, so formulators stabilise pH and protect emulsions from hard water with one material.
2.Processed Cheese And Dairy Emulsifier: Used in processed cheese, dairy and dry mix production, it acts as an emulsifying salt that manages protein-mineral interactions, supporting smooth melt, even texture and stable emulsions in cheese, cream and milk based products.
3.Meat And Seafood Water Retention: In meat and seafood systems it adjusts the ionic environment to support water holding capacity, helping processors improve yield while keeping texture and bite consistent through cooking and chilled storage.
4.Corrosion Control And Scale Inhibition: Dosed into potable and industrial water systems, it works as a corrosion inhibitor on its own or blended with polyphosphates to control scale, and it is also a starting material for sodium polyphosphate production.
5.Detergents, Plating And Buffers: Beyond water treatment it buffers textile processing baths, supports sequestration in cleaning and detergent formulas, stabilises electroplating baths and serves as a phosphate buffer component in laboratory and bioprocessing recipes.
