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Metals, alloys and elements

Einsteinium

Also known as Es, einsteinium atom, einsteinio

CAS 7429-92-7Formula EsMolar mass 252.00 g/mol
4 suppliers listed
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Element with atomic number and standard atomic weight

Key facts

What buyers check first

All properties
CAS number
7429-92-7
Formula
Es
Molar mass
252.00 g/mol
Category
Metals, alloys and elements

What is Einsteinium?

Plain description, key identifiers and synonyms

Einsteinium atom is an actinoid atom and a f-block element atom.

Einsteinium is a chemical element with symbol Es and atomic number 99.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
einsteinium
CAS number
7429-92-7 CAS number cross-checked
Molecular formula
Es
UNII
WV8XL34X3O
InChIKey
CKBRQZNRCSJHFT-UHFFFAOYSA-N
InChI
InChI=1S/Es
SMILES (canonical and isomeric)
[Es]

Synonyms

  • Es
  • einsteinium atom
  • einsteinio
  • Element-Es
  • Element:Es
  • Atomic Einsteinium
  • Einsteinium element
  • Es (element)
  • Element Einsteinium
  • Element:Einsteinium
  • Einsteinium (atomic)
  • Einsteinium (element)
  • 99Es

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
252.00 g/molcalc.
Exact mass
252.083 Dacalc.
LogP (octanol/water)
0calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
1calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Einsteinium suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 4 suppliers
4 of 4 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

4 suppliers in 4 countries

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Einsteinium price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

An indicative HS code has not been assigned to this substance yet, so trade statistics are not linked. Browse world trade statistics by HS code in our trade hub.

Trade data hub

Frequently asked questions

Quick answers about Einsteinium, based on the data on this page

What is Einsteinium?

Einsteinium atom is an actinoid atom and a f-block element atom.

What is the CAS number of Einsteinium?

The CAS registry number of Einsteinium is 7429-92-7.

What is the molecular formula and weight of Einsteinium?

The molecular formula of Einsteinium is Es and its molar mass is 252.00 g/mol.

Is Einsteinium hazardous?

No GHS hazard classification for Einsteinium is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

Where can I buy Einsteinium?

CompoundList lists 4 suppliers of Einsteinium in China, Japan, South Korea and Russia. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Einsteinium?

Suppliers quote Einsteinium on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Einsteinium

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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