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Molybdic acid

Molybdic acid
CAS number
7782-91-4
Molecular weight
161.95
Molecular formula / chemical symbol
H2MoO4

Description

Molybdic acid refers to solid, hydrated forms of molybdenum trioxide and species in aqueous solution.

The simplest solid form, the monohydrate, is MoO3·H2O, though the dihydrate (MoO3·2H2O) is also known. The solid state structure of MoO3·H2O consists of layers of octahedrally coordinated MoO5·(H2O) units where 4 vertices are shared. The dihydrate has the same layer structure with the extra H2O molecule intercalated between the layers.

In aqueous solutions of acidified molybdate salts low concentration molecular O3Mo·3H2O has been characterised spectroscopically.

The salts of molybdic acid are called molybdates.

Molybdic acid

Identifiers

CAS number

7782-91-4

PubChem

82208

ChemSpider

74188

EC number

231-970-5

Jmol-3D images

Image 1

Properties

Molecular formula

MoO3·H2O

Molar mass

161.95 g mol-1 [1]

Density

3.1 g cm-3 [1]

Solubility in water

1510 mg dm-3 [2]

Hazards

R-phrases

R36/37/38 [1]

S-phrases

S24/25, S22 [1]

Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

USES

For the preparation of other molybdenum compounds and molybdenum metal.

Manufacture of molybdenum-based catalysts, blue ceramic glaze and paint.

Keywords:Fine ceramics;Petroleum chemicals

Report

Product name

Molybdic acid

CAS:13765-74-7

Description

Canary yellow powder

Formula

H2MoO4

99.%

TEST RESULTS

≥

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