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Metals, alloys and elements

Actinium

Also known as Ac, actinium atom, actinio

CAS 7440-34-8Formula AcMolar mass 227.00 g/mol
5 suppliers listed
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Element with atomic number and standard atomic weight

Key facts

What buyers check first

All properties
CAS number
7440-34-8
Formula
Ac
Molar mass
227.00 g/mol
HS code
284443
Category
Metals, alloys and elements

What is Actinium?

Plain description, key identifiers and synonyms

Actinium atom is an actinoid atom, a scandium group element atom and a f-block element atom.

Actinium is a chemical element with symbol Ac and atomic number 89.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
actinium
CAS number
7440-34-8 CAS number cross-checked
Molecular formula
Ac
UNII
NIK1K0956U
InChIKey
QQINRWTZWGJFDB-UHFFFAOYSA-N
InChI
InChI=1S/Ac
SMILES (canonical and isomeric)
[Ac]

Synonyms

  • Ac
  • actinium atom
  • actinio
  • Aktinium
  • Atomic Actinium
  • Actinium element
  • Actinium Ion
  • Element Actinium
  • Element-Ac
  • Element:Ac
  • Element:Actinium
  • Ac (element)
  • Actinium (atomic)
  • Actinium (element)
  • 89Ac
  • ZTM

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
227.00 g/molcalc.
Exact mass
227.0278 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.

Actinium suppliers

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

All 5 suppliers
5 of 5 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

5 suppliers in 4 countries

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Actinium 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

Global trade

World import and export statistics for the HS code Actinium is traded under.

HS 2844.43Indicative HS code

Radioactive elements and isotopes and compounds other than those of subheading 284410…

World exports in 2024
$2.19B
+8.8% vs 2023, imports $2.53B
2022 to 2024
Top exporters
  1. Canada32.1%
  2. Netherlands17.0%
  3. Germany11.4%
Top importers
  1. United States37.8%
  2. Germany8.4%
  3. China5.8%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Actinium is indicative (it is known at chapter level only). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Actinium?

Actinium atom is an actinoid atom, a scandium group element atom and a f-block element atom.

What is the CAS number of Actinium?

The CAS registry number of Actinium is 7440-34-8.

What is the molecular formula and weight of Actinium?

The molecular formula of Actinium is Ac and its molar mass is 227.00 g/mol.

Is Actinium hazardous?

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

What is the HS code of Actinium?

Actinium is usually classified under HS code 284443 (Radioactive elements and isotopes and compounds other than those of subheading 284410…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Actinium?

CompoundList lists 5 suppliers of Actinium in Russia, China, Japan and South Korea. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Actinium?

Suppliers quote Actinium 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 Actinium

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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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