Molybdic acid
CAS 7782-91-4
EC 231-970-5
Formula H.1/2MoO4
MW 161.95 g/mol
Inorganic Acids Mining & MetalsAgriculture & FeedTextile, Leather & PaperPulp & Paper CatalysisCorrosion Inhibition
Description
Molybdic acid (CAS 7782-91-4, EC 231-970-5) is an inorganic acid derived from molybdenum trioxide, commonly referenced as H2MoO4 or molybdic(VI) acid. It carries no assigned E-code and is classified under HS code 28111990 within the inorganic acids category.
In metal surface treatment, molybdic acid acts as an anodic corrosion inhibitor by forming a protective molybdate film on steel and aluminium substrates, reducing oxidation rates. In heterogeneous catalysis, it serves as a precursor to molybdenum-based catalysts used in hydrodesulfurisation and selective oxidation reactions within refining and chemical processing operations.
Molybdic acid is supplied as a white to slightly yellow powder and is subject to REACH registration requirements for industrial procurement within the EU. Buyers should confirm purity grade specifications relevant to their application, whether for agricultural micronutrient formulations, textile mordanting, or catalytic use. Standard packaging formats vary by supplier volume requirements.
In metal surface treatment, molybdic acid acts as an anodic corrosion inhibitor by forming a protective molybdate film on steel and aluminium substrates, reducing oxidation rates. In heterogeneous catalysis, it serves as a precursor to molybdenum-based catalysts used in hydrodesulfurisation and selective oxidation reactions within refining and chemical processing operations.
Molybdic acid is supplied as a white to slightly yellow powder and is subject to REACH registration requirements for industrial procurement within the EU. Buyers should confirm purity grade specifications relevant to their application, whether for agricultural micronutrient formulations, textile mordanting, or catalytic use. Standard packaging formats vary by supplier volume requirements.
Physical Properties
| Melting Point | 300 °C |
| Density | 3.1 g/mL at 25 °C(lit.) |
| Appearance | white to slightly yellow powder |
| Color | White powder |
| Odor | Odorless |
| Form | white powder |
| Water Solubility | 70 g/l (20 ºC) |
| pH | 3.46(1 mM solution);2.94(10 mM solution);2.43(100 mM solution) |
Safety & Handling (Learn More)
Warning GHS07 GHS08
H
H319H335H351H373
P
P203P260P261P271P280P318P319P405P501P264+P265P304+P340P337+P317P403+P233P305+P351+P338
Trade & Regulatory
| HS Code | 28111990 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 3 |
Other Names
dihydroxy(dioxo)molybdenumH2MoO4[MoO2(OH)2]molybdic(VI) acidAMMONIUM MOLYBDATEAMMONIUM DIMOLYBDATEAMMONIUM MOLYBDATE TS
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Derivatives
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