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Description
Catalogue Number	105886
Synonyms	bitter salt, epsom salt, sulfuric acid magnesium salt heptahydrate
Description	Magnesium sulfate heptahydrate

Physicochemical Information
Density	1.68 g/cm3 (20 °C)
Melting Point	1124.0 °C
pH value	5.0 – 8.0 (50 g/l, H₂O)
Vapor pressure	0.133 hPa (20 °C)
Bulk density	900 kg/m3
Solubility	710 g/l

Safety Information according to GHS
RTECS	OM4508000
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 +2°C to +30°C.

Specifications
Assay (complexometric)	≥ 99.5 %
Assay (compl.; calc. on dried substance)	99.0 – 100.5 %
Identity	passes test
Appearance of solution	passes test
Insoluble matter	≤ 0.005 %
Acidity or alkalinity	passes test
pH-value (5 %; water, 25 °C)	5.0 – 8.0
Chloride (Cl)	≤ 0.0003 %
Total nitrogen (N)	≤ 0.002 %
Nitrate (NO₃)	≤ 0.002 %
Heavy metals (ACS)	≤ 0.0005 %
As (Arsenic)	≤ 0.0002 %
Ca (Calcium)	≤ 0.005 %
Cu (Copper)	≤ 0.0001 %
Fe (Iron)	≤ 0.0001 %
K (Potassium)	≤ 0.001 %
Mn (Manganese)	≤ 0.0005 %
Na (Sodium)	≤ 0.001 %
NH₄ (Ammonium)	≤ 0.002 %
Pb (Lead)	≤ 0.0001 %
Sr (Strontium)	≤ 0.005 %
Loss on drying (400 °C)	48.0 – 52.0 %
Corresponds to ACS, Reag. Ph Eur

Merck 105886 0500 Magnesium Sulfate Heptahydrate Gr For Analysis 500 GR.