Agent Name |
Yttrium and compounds |
CAS Number |
7440-65-5 |
Formula |
Y |
Major Category |
Metals |
Synonyms |
Yttrium metal |
Category |
Rare Earth Metals |
Description |
Dark-gray to black, odorless solid; [CAMEO] Some compounds, e.g., nitrates, are soluble in water; [ACGIH] |
Sources/Uses |
Used in the nuclear industry and in the production of incandescent gas mantles, alloys of iron and other metals, high-temperature metal coatings, television screen phosphors, and YAG lasers; [ACGIH] |
Comments |
TLV Basis: pulmonary fibrosis in rats after single intratracheal administration of a "very large dose"; In animal studies, it is moderately toxic by the intraperitoneal route; A dose of 50 mg/kg caused hepatic necrosis. Workers producing yttrium europium vanadate phosphor and inhaling an average of 1.4 mg/m3 complained of irritation of the skin, eyes and respiratory tract; This effect was attributed to vanadium. [ACGIH] See the radionuclide, Yttrium-90. See "RARE EARTH METALS." |
Exposure Assessment |
Skin Designation (ACGIH) |
No |
TLV (ACGIH) |
1 mg/m3 |
PEL (OSHA) |
1 mg/m3 |
IDLH (NIOSH) |
500 mg/m3 |
Excerpts from Documentation for IDLHs |
The available toxicological data contain no evidence that an acute exposure to a high concentration of yttrium compounds would impede escape or cause any irreversible health effects within 30 minutes." [NIOSH] |
Explanatory Notes |
mp = 1509 deg C; [CAMEO] |
Adverse Effects |
Fibrogenic |
Yes |
Hepatotoxin |
Hepatotoxin, Secondary |
Links to Other NLM Databases |
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