Ammonium molybdate

  • Hexaammonium molybdate.
Formula
(NH4)2MoO4
Structure
Description
White to greenish-yellow solid.
Uses
In photography and for decorating ceramics, for detecting and determining phosphates, arsenates, lead, also as reagent for alkaloids and many other substances.

Registry Numbers and Inventories.
CAS
12027-67-7
EC (EINECS/ELINCS)
234-722-4
RTECS
QA5076000
RTECS class
Tumorigen; Mutagen
Merck
12,565
Beilstein/Gmelin
19894 (G)
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
H8MoN2O4
Formula mass
196.02
Melting point, °C
286 - 287
Decomposition point, °C
600
Vapor pressure, mmHg
0.007 (151 C)
Vapor density (air=1)
2.5
Density
1.782 g/cm3
Solubility in water
430 g/L

Hazards and Protection.
Storage
Keep container tightly closed. May be stored in general chemical storage area.
Handling
Avoid breathing dust. Use in area with adequate ventilation. Avoid contact with eyes, skin and clothing.
Protection
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Respirators
NIOSH/MSHA approved high-efficiency particulate respirator.
Small spills/leaks
Use appropriate protective equipment. With a clean shovel, carefully place material into a clean, dry container and cover. Remove from area. Flush spill area with water.
Stability
Stable at normal temperature and pressure.
Incompatibilities
Strong oxidizing agents.
Decomposition
Ammonia.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use agent most appropriate to extinguish fire.
Hazards
Toxic oxides of nitrogen may form in fire.
Combustion products
Toxic oxides of nitrogen may form in fire.
Health
1
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OSHA PEL: 5 mg/m3 as Mo.
Exposure effects
Anorexia and listlessness have been reported in animals.
   Ingestion
Diarrhea has been reported in workers and animals. Anorexia occurred in animals.
   Inhalation
Respiratory tract irritation has been reported in animals.
   Skin
Causes irritation.
   Eyes
Causes irritation.

First aid
 
   Ingestion
Dilution: following ingestion and/or prior to gastric evacuation, immediately dilute with 4 to 8 ounces (120 to 240 ml) of milk or water (not to exceed 15 ml/kg in a child).
   Inhalation
Move to fresh air.
   Skin
Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.
   Eyes
Flush with water for at least 15 min.

Transport.
USCG CHRIS Code
AMB