magnesium selenate Property

Density 

1.928 [MER06]

Water Solubility 

g/100g solution in H2O: 31.41 (0°C), 35.70 (25°C), 46.50 (99.5°C); solid phase, MgSeO4 ·7H2O (0°C), MgSeO4 · 6H2O (25°C), MgSeO4 ·4-1/2H2O (99.5°C) [KRU93]

EPA Substance Registry System

Selenic acid, magnesium salt (1:1) (14986-91-5)

Safety

RIDADR 

2630

HazardClass 

6.1(a)

PackingGroup 

I

Hazard and Precautionary Statements (GHS)

magnesium selenate Chemical Properties,Usage,Production

Description

Magnesium selenate has the molecular formula of MgSeO4 and the molecular weight of 167.2566 g/mol. It can be prepared by reacting sodium selenate with magnesium chloride in solution:
MgCl2(aq)+ Na2SeO4(aq) ? MgSeO4+ 2NaCl(aq)
It is soluble in water and the solution must be evaporated to obtain crystals of the hexahydrate, MgSeO4·6H2O. Its molecular weight is 275.3641 g/mol. It is a white, monoclinic crystal with a density of 1.928 g/cm3. Its CAS number is 13446-58-1 and it is soluble in water (55.52 g/100 ml at 60°C). The anhydrate is stable upon heating to 1338°C the heat of formation, △H_f°= —968.5 kJ/mol.

Chemical Properties

monoclinic crystal(s) [MER06]