Cobalt(II) selenide
  • Cobaltous selenide
  • Selanylidenecobalt
Formula CoSe
Structure
Description yellow hexagonal crystals.

Registry Numbers and Inventories.
CAS 1307-99-9
NIH PubChem CID 102108
EC (EINECS/ELINCS) 215-155-1
EC Index Number 034-002-00-8
EC Class T; R23/25, R33, N; R50-53
UN (DOT) 3283
Beilstein/Gmelin 13678 (G)
Canada DSL/NDSL NDSL
US TSCA Listed
Korea ECL Listed

Properties.
Formula CoSe
Formula mass 137.89
Melting point, °C 1055
Density 7.65 g/cm3 (20 C)

Hazards and Protection.
Storage Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection Wear appropriate protective gloves, clothing and goggles.
Respirators Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Cover with plastic sheet to prevent spreading. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.
Stability No data.

Fire.
Fire fighting Use method most appropriate to fight surrounding fire.
Fire potential Non-Combustible
Combustion products Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure effects The toxological properties of this substance have not been fully investigated.
   Inhalation Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Effects of contact or inhalation may be delayed.
   Skin Avoid any skin contact. See Inhalation.
   Eyes See Inhalation.

First aid
 
   Ingestion Seek medical assistance.
   Inhalation Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.
   Skin Remove and isolate contaminated clothing and shoes. Remove material from skin immediately. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.
   Eyes Immediately flush with running water for at least 20 minutes.

Transportation.
UN number 3283
Response guide 151
Hazard class 6.1
Packing Group I; II; III
USCG CHRIS Code SEC  

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