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492 Noble Metals (Chemistry)

E. Iridium SEE ALSO THE FOLLOWING ARTICLES
Very little information is available on iridium and its com-
ANALYTICAL CHEMISTRY • BATTERIES • CATALYSIS,
pounds mainly because it is so little used in industry.
HOMOGENEOUS • CATALYSIS,INDUSTRIAL • ELEC-
TROCHEMICAL ENGINEERING • ISOTOPES,SEPARATION
F. Rhodium AND APPLICATIONS • METALLOGENY • MINING ENGI-
NEERING • ORGANOMETALLIC CHEMISTRY • PERIODIC
Rhodium, like iridium, has little data available, but OSHA
TABLE (CHEMISTRY) • PHOTOGRAPHIC PROCESSES AND
has set an air standard. Some LD 50 (rat) data are available
MATERIALS
for a few of the common complexes (e.g., RhCl 3 ).
G. Osmium
BIBLIOGRAPHY
Osmium metal and most of its compounds are probably
Bailar, J. C., Emeleus, H. J., Nyholm, R., and Trotman-Dikenson, A. F.
safe to handle with proper precautions, but OsO 4 and OsF 8
are highly toxic. The compound OsO 4 is a hazard to the (eds.). (1973). “Comprehensive Inorganic Chemistry.” Pergamon,
New York.
eyes, nose, and throat and readily oxidizes organic mat-
Cubberly, W. H., et al. (eds.). (1979). “Metals Handbook,” 9th ed. Amer-
ter. It can cause dermatitis and ulceration of the skin on
ican Society for Metals, Metal Park, Ohio.
contact, as well as cause conjunctivitis, corneal irritation, Hightower, J. (1977). “Platinum Group Metals,” National Academy of
halo effects, and temporary blindness. Sciences, Washington, D.C.
Kirk, R. E., and Othmer, D. F. (eds.). (1978). “Encyclopedia of Chemical
Technology,” 3rd ed. Wiley, New York.
H. Ruthenium Robbins, P., and Lee, D. (1979). “Guide to Precious Metals and Their
Markets.” Van Nostrand-Reinhold, New York.
Itisgenerallyassumedthatrutheniumbehavesinamanner Wilkinson, G., Stone, F. G. A., and Abel, E. W. (eds.). (1982). “Com-
similar to that of osmium. prehensive Organometallic Chemistry.” Pergamon, Oxford.