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Sodium Molybdate Dihydrate


Synonyms: disodium molybdate dihydrate
CAS No.: 10102-40-6   EC No.: 231-551-7   RTECS No.: QA5075000
Molecular Weight: 241.95
Molecular Formula: Na2MoO4.2H2O
Density: 3.78g/cm3
m.p.: 687°C
Solubility in water: 84g/100ml


By dissolving MoO3 in sodium hydroxide at 50–70°C and crystallizing the filtered product, sodium molybdate dihydrate can be obtained:
MoO3 + 2NaOH → Na2MoO4·2H2O


1) The agriculture industry uses sodium molybdate as a fertilizer. In particular, it has been suggested for treatment of whiptail in broccoliand cauliflower in molybdenum-deficient soils. However, care must be taken because at a level of 0.3 ppm sodium molybdate can cause copper deficiencies in animals, particularly cattle.
2) Sodium molybdate is used in industry as a non-oxidizing anodic corrosion inhibitor. The addition of sodium molybdate significantly reduces the nitrite requirement of fluids inhibited with nitrite-amine, and improves the corrosion protection of carboxylate salt fluids.
3) Sodium molybdate is also applied in pigments industry

Sodium molybdate dihydrate Content 99.4% min.
Mo 39.4%
Heavy Metals 0.001% max
Insolubles in ammonia 0.05% max
Appearance white crystal powder

50kgs net/iron drums lined with plastic bags or 25kgs net/woven bags lined with plastic bags, or according to customer’s requirement

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Not regulated by UN as hazardous substance.
For more information, please see MSDS

No Hazard

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