Cadmium oxide

  • Cadmium monoxide
  • Cadmium(II) oxide
Formula
CdO
Structure
Description
Dark-brown, infusible powder or cubic crystals. Odorless.
Uses
High purity cadmium oxide is used as a second polarizer (in addition to silver oxide) in silver-zinc storage batteries.

Registry Numbers and Inventories.
CAS
1306-19-0
EC (EINECS/ELINCS)
215-146-2
EC Index Number
048-002-00-0
EC Class
Carcinogenic Category 2; Toxic; Harmful
RTECS
EV1925000
RTECS class
Tumorigen; Mutagen; Reproductive Effector; Human Data
UN (DOT)
2570
Merck
12,1659
Beilstein/Gmelin
13660 (G)
RCRA
D006
EPA OPP
236200
Swiss Giftliste 1
G-6526
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
CdO
Formula mass
128.40
Sublimation point, °C
1390
Vapor pressure, mmHg
1
Odor Threshold Odor threshold Odorless
Density
8.15 g/cm3
Solubility in water
Insoluble
Refractive index
2.49

Hazards and Protection.
Storage
Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Do not ingest or inhale. Do not breathe dust.
Protection
Eyes: Wear safety glasses and chemical goggles if splashing is possible. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
Wear a NIOSH/MSHA or European Standard EN 149 approved full-facepiece airline respirator in the positive pressure mode with emergency escape provisions.
Small spills/leaks
Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.
Stability
Stable under normal temperatures and pressures. May discolor on exposure to light.
Incompatibilities
Oxidizing agents, magnesium.
Decomposition
Cadmium fumes.

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. To extinguish fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Fire potential
Noncombustible
Hazards
When heated to decomposition, it emits toxic fumes of cadmium.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OSHA PEL: 1910.1027 TWA 0.005 mg/m3 NIOSH REL: Ca See Appendix A *Note: REL and PEL apply to all Cd compounds (as Cd). NIOSH IDLH: Potential occupational carcinogen 9 mg/m3 (as Cd)
Carcinogin
O, G-A2, I-1, N-1, CP65
Poison_Class
1
Exposure effects
Chronic exposure may cause reproductive disorders and teratogenic effects. Cadmium and compounds may cause lung, liver and kidney damage and lung and prostrate cancer in humans. Potential cancer hazard. Inhalation over a number of years results in chronic cadmium poisoning , a disease characterized by distinctive, nonhypertrophic emphysema wi th or without renal tubular injury. Long term exposure may also cause anemia, chronic rhinitis, yellow discoloration of the teeth and bone changes.
   Ingestion
Harmful if swallowed. Symptoms may be delayed 15 - 30 hours after ingestion and include increased salivation, nausea and vomiting, abdominal pains, diarrhea, vertigo, and unconsciousness.
   Inhalation
Harmful if inhaled. 12-16 hours after inhalation, the following symptoms may occur: change in sense of smell, headache, vertigo, gastrointestinal lesions, sever re abdominal and chest pains, cough with blood, dyspnea, high temperat ure, severe persperiation, collapse and pneumonia. Causes kidney and lung damage. May cause severe pulmonary edema resulting in death.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

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 breathing is difficult, give oxygen. Do not use mouth-to-mouth respiration 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.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

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