Cadmium selenide

  • Cadmium diselenide
Formula
CdSe
Structure
Description
Dark red to brown powder, odorless.

Registry Numbers and Inventories.
CAS
12400-33-8
RTECS
EV2300000
RTECS class
Other
UN (DOT)
2570
Beilstein/Gmelin
13656 (G)

Properties.
Formula
CdSe
Formula mass
191.37
Melting point, °C
1350
Density
5.93 g/cm3 (27 C)
Solubility in water
Insoluble
Refractive index
1.389
Thermal expansion
2.45E-6/K (27 C)

Hazards and Protection.
Storage
Store in a dry place away from possible contact with strong acids. Store in tightly closed containers. Do not store near combustibles.
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
ELIMINATE all ignition sources. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.
Stability
Stable at normal temperatures and pressures.
Incompatibilities
Strong acids.
Decomposition
Hydrogen selenide.

Fire.
Fire fighting
Extinguish using agent most appropriate for surrounding fire.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
Contact with metals may evolve flammable hydrogen gas.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
5 µg/m3 PEL {2 µg/m3 respirable TLV}
Carcinogin
O, G-A2, I-1, N-1, CP65
Exposure effects
   Ingestion
See Inhalation.
   Inhalation
TOXIC; inhalation, ingestion, or skin contact with material may cause severe injury or death. Effects of contact or inhalation may be delayed.
   Skin
Contact with molten substance may cause severe burns to skin and eyes. 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. 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.

Transport.
UN number
2570
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
CDY