Overview
Molybdic acid (CAS 7782-91-4 ) is an inorganic molybdenum compound used industrially as a corrosion inhibitor and catalyst precursor. It delivers molybdate chemistry in solid form, making it a practical source material for downstream formulation.
This material is essential for processing across metal treatment, agriculture, and chemical manufacturing. In corrosion inhibitor formulations, it provides molybdate ions that passivate metal surfaces in cooling water systems and industrial coatings.
Catalyst manufacturers use it as a precursor to molybdenum-based catalysts applied in hydrodesulfurization, oxidation reactions, and petrochemical refining. These applications are critical for modern industrial efficiency and chemical synthesis.
In agriculture, it serves as a micronutrient source for molybdenum-deficient soils. It is frequently incorporated into fertilizer blends and foliar spray formulations to ensure optimal crop health and yield across various regions.
The mining and metals sector uses it in ore processing and as a starting material for producing molybdenum salts and pigments. This versatility makes it a staple component in heavy industrial manufacturing and mineral processing.
Molybdic acid is supplied as a white to slightly yellow powder. It is available in technical grade, with purity levels typically specified at 85% or higher MoO₃ equivalent, depending on the specific application requirements.
Packaging ranges from small laboratory quantities to bulk industrial supply. Specifications are confirmed against buyer requirements for catalyst or agricultural use to ensure the highest performance standards in every batch delivered.
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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
Warning GHS07 GHS08 Hazard Statements H319 Causes serious eye irritation H335 May cause respiratory irritation H351 Suspected of causing cancer H373 May causes damage to organs through prolonged or repeated exposure Precautionary Statements P203 Obtain, consult and follow expert instructions for use. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P318 IF exposed or concerned, get medical advice. P319 Get medical advice/attention if you feel unwell. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 28111990 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 7782-91-4
- EC Number
- 231-970-5
- Mol. Weight
- 161.96
- HS Code
- 28111990
- Category
- Inorganic Acids