Silver(I) oxide (SILL-ver one OK-side) is an odorless dark brown or black powder with a metallic taste. It is used primarily for polishing glass, the purification of water, and coloring glass.
HOW IT IS MADE
Silver(I) oxide is made by reacting silver nitrate (AgNO3) with sodium or potassium hydroxide (NaOH or KOH). For example:
2AgNO3 + 2NaOH → Ag2O + 2NaNO3 + H2O
The silver(I) oxide settles out as a precipitate that can then be washed and purified.
Silver oxide; argentous oxide
Metallic oxide (inorganic)
Decomposes at about 200°C (400°F)
Slightly soluble in water; insoluble in ethyl alcohol
COMMON USES AND POTENTIAL HAZARDS
Silver(I) oxide finds limited commercial and industrial application. It is used as an ingredient in the manufacture of glass to give a yellowish caste to the glass. It is also a component of mixtures used to polish glass, including the glass used in optical lenses. Silver(I) oxide is also used as a catalyst in certain industrial operations and in some water purification systems.
Words to Know
- Referring to a solution that consists of some material dissolved in water.
- A solid material that settles out of a solution, often as the result of a chemical reaction.
Silver(I) oxide is a skin, eye, and respiratory irritant that may cause coughing, wheezing, shortness of breath, and pulmonary edema (accumulation of fluid in the lungs). It can also cause burning of the eyes and skin. Ingestion can produce burning of the gastrointestinal tract accompanied by nausea, vomiting, and abdominal pain. Long-term exposure to silver(I) oxide can cause argyreia, a bluish-gray discoloration of the skin, eyes, and mucous membranes (the soft tissues lining the breathing and digestive passages).
FOR FUR THER INFORMATION
"Material Safety Data Sheet." IC Controls. http://www.iccontrols.com/files/a1100122.pdf (accessed on November 5, 2005).
"Silver(I) Oxide." Patnaik, Pradyot. Handbook of Inorganic Chemicals. New York: McGraw-Hill, 2003, 842-843.
"Silver Oxide." Chem007. http://www.chem007.com/specification_d/chemicals/supplier/cas/Silver%20oxide.asp (accessed on November 5, 2005).