Agent Name

Thulium

CAS Number

7440-30-4

Formula

Tm

Major Category

Metals

Category

Rare Earth Metals

Description

Malleable, silver-white metal; [Merck Index]

Sources/Uses

Least abundant of the rare earth metals; Obtained from the mineral monazite, which contains about 0.07% thulium; It may have uses as an energy source, in ferrites (ceramic magnetic materials) in microwave equipment, and to dope fiber lasers; 100% of natural thulium is the Tm-169 isotope, which is stable; [Reference#1]

Comments

Acute toxicity: low to moderate; [Reference#1] See "RARE EARTH METALS" and linked occupational diseases.

Reference Link

LANL: Thulium

Exposure Assessment
Explanatory Notes

mp = 1545 deg C; [Merck Index]

Adverse Effects
Fibrogenic

Yes

Links to Other NLM Databases
Toxicity Information

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Chemical Information

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Related Information in HazMap
Processes

Industrial Processes with risk of exposure: