Potassium molybdate

  • Dipotassium molybdate
  • Dipotassium tetraoxomolybdate
  • Molybdate (MoO42-), dipotassium, (T-4)-
  • Potassium orthomolybdate
Formula
K2MoO4
Structure
Description
White hygroscopic crystals

Registry Numbers and Inventories.
CAS
13446-49-6
EC (EINECS/ELINCS)
236-599-2
36/37/38
RTECS
QA4930000
RTECS class
Mutagen
Merck
13,7732
Beilstein/Gmelin
9462 (G)
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
K2MoO4
Formula mass
238.13
Melting point, °C
926
Decomposition point, °C
1400
Density
2.91 g/cm3 (18 C)
Solubility in water
645 g/L (20 C)
Thermal expansion
2.75E-4/K
Heat of fusion
35.4 kJ/mol

Hazards and Protection.
Storage
Keep tightly closed.
Protection
Compatible chemical-resistant gloves. Chemical safety goggles.
Respirators
Government approved respirator.
Small spills/leaks
Sweep up, place in a bag and hold for waste disposal. Avoid raising dust. Ventilate area and wash spill site after material pickup is complete.
Stability
Stable at normal temperatures and pressures. Protect from moisture.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, Carbon dioxide.

Fire.
Fire fighting
Extinguish using Noncombustible. Use extinguishing media appropriate to surrounding fire conditions. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Hazards
Emits toxic fumes under fire conditions.
Health
2
 
Flammability
0
 
 
Reactivity
1
 

Health.
Exposure effects
Irritant. Irritating to eyes, respiratory system and skin.
   Ingestion
May be harmful if swallowed.
   Inhalation
Material is irritating to mucous membranes and upper
   Skin
Causes skin irritation. May be harmful if absorbed through the skin.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
If swallowed, wash out mouth with water provided person is conscious. Call a physician.
   Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
   Skin
In case of contact, immediately wash skin with soap and copious amounts of water.
   Eyes
In case of contact, immediately flush eyes with copious amounts of water for at least 15 minutes.

Transport.