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Description
Catalogue Number	106576
Synonyms	Sodium monohydrogen phosphate, Sodium phosphate dibasic
Description	di-Sodium hydrogen phosphate dihydrate

Physicochemical Information
Density	2.1 g/cm3 (20 °C)
Melting Point	92.5 °C Elimination of water of crystallisation
pH value	9.0 – 9.4 (50 g/l, H₂O, 20 °C)
Bulk density	850 – 1000 kg/m3
Solubility	93 g/l

Toxicological Information
LD 50 oral	LD50 Rat > 2000 mg/kg

Safety Information according to GHS
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 (calculated on dried substance according to Ph Eur)	98.0 – 101.0 %
Assay (calculated on dried substance according to USP)	98.0 – 100.5 %
Identity	passes test
Appearance of solution	passes test
In water insoluble matter	≤ 0.3 %
pH-value (5 %; water)	8.9 – 9.2
Chloride (Cl)	≤ 0.005 %
Sulfate (SO₄)	≤ 0.02 %
As (Arsenic)	≤ 0.0002 %
Fe (Iron)	≤ 0.001 %
Sodium dihydrogen phosphate (NaH₂PO₄)	≤ 1.7 %
Residual solvents (ICH Q3C)	excluded by manufacturing process
Substances reducing potassium permanganate (as O)	passes test
Loss on drying (130 °C)	19.5 – 21.0 %
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 Ph Eur, BP, USP

Merck 106576 5000 Sodium Hydrogen Phosp. Dihyd. Emprove 5 KG.