Fluka

Sodium phosphate dibasic

SKU

56814

Tested according to Ph.Eur.

Synonym(s)

Dinatrii phosphas anhydricus; sec-Sodium phosphate; Disodium hydrogen phosphate; Disodium phosphate; Sodium hydrogenphosphate

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General Information:

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Brand Fluka	CAS Numbers (All) 7558-79-4	EC Number 231-448-7	Linear Formula Na₂HPO₄	MDL Number MFCD00003496
Molar Mass 141.96 g/mol	RTECS Number WC4500000	Synonyms Dinatrii phosphas anhydricus; sec-Sodium phosphate; Disodium hydrogen phosphate; Disodium phosphate; Sodium hydrogenphosphate

Property	Value
pKa (25 °C)	(1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
Identity A	complying
Identity C	complying
Identity D	complying
Assay (calculated to the dried substance)	98.0 - 101.0 %
Assay of NaH₂PO₄ (calculated to dried substances)	Max. 2.5 %
Appearance of the solution	complying
Loss on drying (105°C, 4 h)	Max. 1.0 %
Arsenic (As)	Max. 2 ppm
Iron (Fe)	Max. 20 ppm
Heavy metals (as Pb)	Max. 10 ppm
Chloride (Cl)	Max. 200 ppm
Sulfate (SO₄)	Max. 500 ppm
Reducing impurities	complying
Residual solvents	complying

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