Molybdenum pentachloride

  • Molybdenum(V) chloride
Formula
MoCl5
Structure
Description
Molybdenum pentachloride is a green-black odorless solid.

Registry Numbers and Inventories.
CAS
10241-05-1
EC (EINECS/ELINCS)
233-575-3
RTECS
QA4690000
RTECS class
Mutagen
UN (DOT)
2508
Beilstein/Gmelin
2604 (G)
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Korea ECL
Listed

Properties.
Formula
Cl5Mo
Formula mass
273.20
Melting point, °C
194
Vapor pressure, mmHg
1.75
Vapor density (air=1)
9.41
Density
2.92 g/cm3
Solubility in water
Reacts

Hazards and Protection.
Storage
Store in a cool, dry, well-ventilated area away from incompatible substances. Corrosives area. Keep containers tightly closed.
Handling
Use only in a well ventilated area. Minimize dust generation and accumulation. Ground and bond containers when transferring material. Keep container tightly closed. Do not get on skin or in eyes. Do not ingest or inhale. Discard contaminated shoes.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Remove all sources of ignition. Provide ventilation. A vapor suppressing foam may be used to reduce vapors. Stop leak only if you can do so without risk.
Stability
Reacts with water to form toxic fumes. Unstable in air
Incompatibilities
Water, strong oxidizing agents.
Decomposition
Hydrogen chloride, chlorine.

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. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water. Substance will react with water (some violently) releasing flammable, toxic, or corrosive gases and runoff. Combustible material; may burn but does not ignite readily. Extinguishing media: Do NOT use straight streams of water. Most foams will react with the material and release corrosive/toxic gases. In case of fire use dry chemical, dry sand, or carbon dioxide.
Fire potential
May burn but does not ignite readily.
Hazards
Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapors may travel to source of ignition and flash back. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.
Combustion products
During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.
Health
3
 
Reactivity
2
 

Health.
Exposure limit(s)
NIOSH REL*: See Appendix D OSHA PEL*: TWA 15 mg/m3 [*Note: REL and PEL also apply to other insoluble molybdenum compounds (as Mo).] IDLH 5000 mg/m3 (as Mo)
Exposure effects
   Ingestion
Causes gastrointestinal tract burns. May cause central nervous system effects.
   Inhalation
May cause severe irritation of the respiratory tract with sore throat, coughing, shortness of breath and delayed lung edema. Causes chemical burns to the respiratory tract.
   Skin
Causes severe skin irritation and burns.
   Eyes
Causes severe eye irritation and burns.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
   Skin
Get medical aid immediately. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Discard contaminated clothing in a manner which limits further exposure.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).

Transport.
UN number
2508
Response guide
Hazard class
8
Packing Group
III
 
Std. Transport #
4936354