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Description
Catalogue Number	106574
Description	di-Sodium hydrogen phosphate heptahydrate

Physicochemical Information
Density	1.68 g/cm3 (20 °C)
Melting Point	48 °C Elimination of water of crystallisation
pH value	9.0 – 9.3 (50 g/l, H₂O, 25 °C)
Bulk density	800 kg/m3
Solubility	154 g/l

Toxicological Information
LD 50 oral	LD50 Rat 12930 mg/kg

Safety Information according to GHS
RTECS	WC4600000
Storage class	10 – 13 Other liquids and solids
WGK	WGK 1 slightly hazardous to water
Disposal	14 Inorganic salts: Container I. Neutral solutions of the these salts: Container D. Before placing in Container D, check the pH with pH-Universal indicator strips (Item No. 109535).

Storage and Shipping Information
Storage	Store at +15°C to +25°C.

Specifications
Assay (alkalimetric, calculated on dried substance)	98.0 – 100.5 %
Identity	passes test
Appearance of solution	passes test
Insoluble substances	≤ 0.4 %
pH-value (5 %; water)	8.7 – 9.3
Sodium Dihydrogene phospate (NaH₂PO₄)	passes test
Chloride (Cl)	≤ 0.0200 %
Sulfate (SO₄)	≤ 0.0500 %
Heavy metals (as Pb)	≤ 0.0010 %
As (Arsenic)	≤ 0.0002 %
Fe (Iron)	≤ 0.0020 %
Residual solvents (ICH Q3C)	excluded by manufacturing process
Reducing substances	passes test
Loss on drying (130 °C)	45.0 – 49.0 %
Elemental impurity specifications have been set considering ICH Q3D (Guideline for Elemental Impurities). Class 1-3 elements are not likely to be present above the ICH Q3D option 1 limit, unless specified and indicated (*).
Corresponds to DAC, USP

Merck 106574 1000 Sodium Hydrogen Phosp. Cryst Emprove 1 KG.