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71642

Sigma-Aldrich

Sodium phosphate dibasic

purum p.a., anhydrous, ≥98.0% (T)

Synonym(s):

sec-Sodium phosphate, Disodium hydrogen phosphate, Disodium phosphate, Sodium hydrogenphosphate

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About This Item

Linear Formula:
Na2HPO4
CAS Number:
7558-79-4
Molecular Weight:
141.96
EC Number:
231-448-7
MDL number:
MFCD00003496
UNSPSC Code:
12161700
eCl@ss:
38070211
PubChem Substance ID:
329763392
NACRES:
NA.25

Quality Level

300

grade

purum p.a.

assay

≥98.0% (T)

form

powder

loss

≤2% loss on drying, 110 °C

pH

8.8-9.4 (25 °C, 50 mg/mL in H2O)

pKa (25 °C)

(1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)

solubility

water: soluble 50 mg/mL at 25 °C

anion traces

chloride (Cl-): ≤50 mg/kg
sulfate (SO42-): ≤1000 mg/kg

cation traces

Ca: ≤50 mg/kg
Cd: ≤50 mg/kg
Co: ≤50 mg/kg
Cu: ≤50 mg/kg
Fe: ≤50 mg/kg
K: ≤200 mg/kg
Ni: ≤50 mg/kg
Pb: ≤50 mg/kg
Zn: ≤50 mg/kg

SMILES string

[Na+].[Na+].[H]OP([O-])([O-])=O

InChI

1S/2Na.H3O4P/c;;1-5(2,3)4/h;;(H3,1,2,3,4)/q2*+1;/p-2

InChI key

BNIILDVGGAEEIG-UHFFFAOYSA-L

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Application


  • Effects of a commercial whitening toothpaste containing hydrogen peroxide and citric acid on dentin abrasion and erosion.: This study evaluates the effects of sodium phosphate dibasic in a commercial whitening toothpaste formulation. The research highlights its role in mitigating dentin abrasion and erosion, emphasizing its importance in dental care applications (Kim JH et al., 2023).

  • Electrospraying of Bio-Based Chitosan Microcapsules Using Novel Mixed Cross-Linker: Experimental and Response Surface Methodology Optimization.: Sodium phosphate dibasic is utilized in the cross-linking process of chitosan microcapsules via electrospraying. This study demonstrates its significance in optimizing the physical properties and stability of bio-based microcapsules for potential applications in drug delivery systems (Uko L et al., 2022).

  • Compound treatment of thiolated citrus high-methoxyl pectin and sodium phosphate dibasic anhydrous improved gluten network structure.: This research investigates the combined effect of sodium phosphate dibasic and thiolated citrus high-methoxyl pectin on improving the gluten network structure in food systems, highlighting its role in enhancing food texture and quality (Chen J et al., 2023).

  • Bioremediation of trichloroethylene-polluted groundwater using emulsified castor oil for slow carbon release and acidification control.: Sodium phosphate dibasic is used to control acidification in the bioremediation of trichloroethylene-polluted groundwater, demonstrating its application in environmental engineering and pollution control (Chen WT et al., 2022).

  • Use of cellulose nanofibril (CNF)/silver nanoparticles (AgNPs) composite in salt hydrate phase change material for efficient thermal energy storage.: The study utilizes sodium phosphate dibasic in the development of a composite material for thermal energy storage, showcasing its importance in enhancing the thermal properties and efficiency of phase change materials (Shen Z et al., 2021).

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

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