Silver oxide

  • Disilver oxide
  • Argentous oxide
Formula
Ag2O
Structure
Description
Odorless brown-black solid.
Uses
Used as a catalyst.

Registry Numbers and Inventories.
CAS
20667-12-3
EC (EINECS/ELINCS)
243-957-1
R 37/38 41
S 26 37/39
RTECS
VW4900000
RTECS class
Other
UN (DOT)
1479
Merck
12,8665
Beilstein/Gmelin
9260 (G)
Swiss Giftliste 1
G-4827
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
Ag2O
Formula mass
231.73
Melting point, °C
800 - 830
Odor Threshold Odor threshold Odorless
Density
7.14 g/cm3
Solubility in water
Insoluble
Heat of fusion
15.3 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Do not store near combustible materials. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from light.
Handling
Wash thoroughly after handling. Use with adequate ventilation. Keep container tightly closed. Avoid contact with clothing and other combustible materials. Do not get on skin or in eyes. Do not ingest or inhale. Store protected from light. Do not store near combustible materials.
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
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Avoid generating dusty conditions. Remove all sources of ignition. Provide ventilation.
Stability
Stable under normal shipping and handling conditions. Absorbs carbon dioxide from the air. Explodes on contact with ammonia.
Incompatibilities
Carbon monoxide, hydrogen sulfide, mercury, selenium, sulfur, phosphorus, potassium, sodium, sodium potassium, seleninyl chloride, auric sulfide, mercury sulfide, antimony sulfide, nitroalkanes, amines, strong oxidizing agents, strong acids, ammonia + ethanol, hydrazine + ethanol, cupric oxide, ammonia.
Decomposition
Irritating and toxic fumes and gases, oxygen, silver fumes.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Strong oxidizer. Contact with combustible materials may cause a fire. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Wear appropriate protective clothing to prevent contact with skin and eyes. Wear a self-contained breathing apparatus (SCBA) to prevent contact with thermal decomposition products. Extinguishing media: Use agent most appropriate to extinguish fire. In case of fire use water spray, dry chemical, carbon dioxide, or appropriate foam.
Hazards
Strong oxidizer. Contact with combustible materials may cause a fire.
Health
2
 
Flammability
0
 
 
Reactivity
1
 

Health.
Poison_Class
4
Exposure effects
Chronic inhalation or ingestion may cause argyria characterized by blue-gray discoloration of the eyes, skin and mucous membrances. Chronic skin contact may cause permanent discoloration of the skin.
   Ingestion
Harmful if swallowed. May cause severe gastrointestinal tract irritation with nausea, vomiting and possible burns.
   Inhalation
May cause irritation of the respiratory tract with burning pain in the nose and throat, coughing, wheezing, shortness of breath and pulmonary edema.
   Skin
May cause skin irritation. May cause severe irritation and possible burns.
   Eyes
Contact with eyes may cause severe irritation, and possible eye 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.
   Skin
Get medical aid immediately. Immediately 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. Do NOT allow victim to rub or keep eyes closed.

Transport.
UN number
1479
Response guide
USCG CHRIS Code
SVO