Chemicals and Drugs

Einsteinium

A man-made radioactive actinide with atomic symbol Es, and atomic number 99. Its known isotopes range in mass number from 240-258. Its valence can be +2 or +3. Einsteinium was originally discovered in the debris from a thermonuclear explosion in 1952.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A man-made radioactive actinide with atomic symbol Es, and atomic number 99. Its known isotopes range in mass number from 240-258. Its valence can be +2 or +3. Einsteinium was originally discovered in the debris from a thermonuclear explosion in 1952.

Chemical Identity

Chemical Information

Molecular Formula
Es
Molecular Weight
252.0830 g/mol
CAS Registry No.
7429-92-7
IUPAC Name
einsteinium
InChIKey
CKBRQZNRCSJHFT-UHFFFAOYSA-N
SMILES
[Es]
MeSH Unique ID
D004540
Source
PubChem CID 23913

MeSH Record

Classification

Broader headings

Related Concepts

Knowledge Graph

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MeSH Record

Aspects Covered

19 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, analysis, blood, cerebrospinal fluid, chemistry, classification, economics, history, isolation & purification, metabolism, pharmacokinetics, pharmacology, poisoning, standards, supply & distribution, therapeutic use, toxicity, urine.

MeSH Hierarchy

Tree Numbers

  1. D01w.268w.271w.100w.250w
  2. D01w.268w.556w.244w
  3. D01w.496w.749.305w.100w.250w
  4. D01w.552w.020w.337w
  5. D01w.552w.544w.244w

AMA Style

References

  1. National Library of Medicine. Einsteinium. Medical Subject Headings (MeSH). 2026. Unique ID D004540. http://id.nlm.nih.gov/mesh/2026/D004540
  2. Einsteinium. In: Wikipedia. https://en.wikipedia.org/wiki/Einsteinium
  3. Einsteinium. In: Wikidata. https://www.wikidata.org/wiki/Q1892
  4. Einsteinium. In: PubChem Compound. CID 23913. https://pubchem.ncbi.nlm.nih.gov/compound/23913