Agent Name

Einsteinium

CAS Number

7429-92-7

Formula

Es

Major Category

Physical/Radiation

Category

Radionuclides

Description

A metal with a melting point of about 860 degrees C; [Merck Index]

Sources/Uses

A radioactive element discovered in 1952 in the debris from a nuclear detonation; Known isotopes include Es-243 to Es-256. [Merck Index] About 3 mg of einsteinium has been produced at Oak Ridge National Laboratories by irradiating kilogram quantities of Pu-239 for several years to produce Pu-242, fabricating the Pu-242 into pellets, and loading the pellets into target rods for16 months of irradiation. The 14 isotopes have short half-lives. The longest half-life is 275 days (Es-254) [http://periodic.lanl.gov/elements/99.html]

Comments

Most Important Radionuclide: Es-254 Source: Neutron bombardment of plutonium; Half-Life: 472 days Lung Clearance Half-Time: Weeks Internal Toxicity: Very High Annual Limit on Intake: 0.00002 mCi; [See Glossary for references.] See "Radiation, ionizing."

Reference Link

LANL: Einsteinium

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Related Information in HazMap
Other Information

No other related information on this agent was found.