| Agent Name |
Rhodium and compounds |
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| CAS Number |
7440-16-6, varies |
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| Formula |
Rh, varies |
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| Major Category |
Metals |
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| Synonyms |
Rhodium metal; Elemental rhodium; Rhodium compounds; [NIOSH] |
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| Category |
Elements, Metallic |
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| Description |
Metal: White, hard, ductile, malleable solid with a bluish-gray luster; [NIOSH] |
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| Sources/Uses |
Used in rhodium-platinum alloys for spinnerets; used in furnace windings, laboratory crucibles, catalysts, and nitric acid manufacturing; also used in the surfacing of reflectors, electrical contacts, scientific instruments, and jewelry; [ACGIH] |
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| Comments |
Can cause occupational contact urticaria; [Kanerva 2004, p. 104] |
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| Exposure Assessment |
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| Skin Designation (ACGIH) |
No |
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| TLV (ACGIH) |
1 mg/m3, as Rh(metal and insol. compds), 0.01 mg/m3, as Rh(sol. compds) |
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| PEL (OSHA) |
0.1 mg/m3, as Rh(metal and insol. compds),0.001 mg/m3, as Rh(sol. compds) |
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| IDLH (NIOSH) |
100 mg/m3, as Rh(metal and insol. compds), 2 mg/m3, as Rh(sol. compds) |
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| Excerpts from Documentation for IDLHs |
No inhalation toxicity data are available on which to base an IDLH for insoluble rhodium compounds. Therefore, the revised IDLH for insoluble rhodium compounds is 100 mg Rh/m3 based on acute oral toxicity data in animals [Johnson 1981; Veselov 1977]. This may be a conservative value due to the lack of relevant acute toxicity data for workers. |
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| Links to Other NLM Databases |
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| Health Studies |
Human Health Effects from Hazardous Substances Data Bank: RHODIUM COMPOUNDS RHODIUM
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