Product Identification

Product Name

Hexaammonium molybdate

Synonyms

Hexaammonium molybdate

CAS

12027-67-7

Formula

H24Mo7N6O22

Molecular Weight

1131.8

EINECS

234-722-4

RTECS

QA5076000

RTECS Class

Tumorigen; Mutagen

Merck

12,565

Beilstein/Gmelin

19894 (G)

Physical and Chemical Properties

Appearance

White to greenish-yellow solid.

Solubility in water

430 g/L

Melting Point

286 - 287

Vapor Pressure

0.007 (151 C)

Density

1.782 g/cm3

Usage

In photography and for decorating ceramics, for detecting and determining phosphates, arsenates, lead, also as reagent for alkaloids and many other substances.

Vapor Density

2.5

First Aid Measures

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.

Handling and Storage

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.

Hazards Identification

Inhalation

Respiratory tract irritation has been reported in animals.

Skin

Causes irritation.

Eyes

Causes irritation.

Ingestion

Diarrhea has been reported in workers and animals. Anorexia occurred in animals.

Hazards

Toxic oxides of nitrogen may form in fire.

Exposure Controls/Personal Protection

Personal 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.

Exposure Effects

Anorexia and listlessness have been reported in animals.

Exposure limit(s)

OSHA PEL: 5 mg/m3 as Mo.

Fire Fighting Measures

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.

Accidental Release Measures

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 and Reactivity

Stability

Stable at normal temperature and pressure.

Incompatibilities

Strong oxidizing agents.

Decomposition

Ammonia.

Combustion Products

Toxic oxides of nitrogen may form in fire.