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Rare earth compounds

Samarium

Also known as Samarium, elemental, SM, Samarium Metallicum

CAS 7440-19-9Formula SmMolar mass 150.36 g/molEC 231-128-7
GHS signal word: Danger. Pictograms: Flammable 61 suppliers listed Drug substance
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Element with atomic number and standard atomic weight

Key facts

What buyers check first

All properties
Appearance
Silvery metal, rhombohedral
Melting point
1,072 °C
Boiling point
1,794 °C
Density
7.52 g cm³ at 25 °C
HS code
280530
Category
Rare earth compounds

What is Samarium?

Plain description, key identifiers and synonyms

Samarium atom is a lanthanoid atom and a f-block element atom.

Samarium is a chemical element with symbol Sm and atomic number 62.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
samarium
CAS number
7440-19-9 CAS number cross-checkedOther or deprecated CAS: 13598-53-3
EC number
231-128-7
Molecular formula
Sm
UNII
42OD65L39F
MDL number
MFCD00011233
InChIKey
KZUNJOHGWZRPMI-UHFFFAOYSA-N
InChI
InChI=1S/Sm
SMILES (canonical and isomeric)
[Sm]

Synonyms

  • Samarium, elemental
  • SM
  • Samarium Metallicum
  • samarium atom
  • samario
  • Samarium149
  • 62Sm
  • Samarium Standard: Sm @ 1000 microg/mL in 5% HNO3
  • Samarium Standard: Sm @ 10000 microg/mL in 5% HNO3
  • samarium metal
  • Samarium powder
  • Samarium ingot
  • Atomic Samarium
  • Samarium element
  • Element Samarium
  • Element-Sm
  • Element:Samarium
  • Element:Sm
  • Samarium (atomic)
  • Sm (element)
  • Samarium (element)
  • Samarium foil, 3N
  • Samarium ingot, 3N
  • Sm Standard Solution
  • Samarium pieces, 3N
Show all 37 synonyms
  • Samarium chunks,99.9%
  • Samarium powder,99.9%
  • Samarium powder, -40 mesh
  • Samarium, 99.9%
  • 1,2-Diacylglycerol-LD-SM-pool
  • Samarium pieces, sublimed dendritic
  • Samarium rod, 12.7mm (0.5in) dia
  • Samarium foil, 1.0mm (0.04in) thick
  • Samarium rod, 6.35mm (0.25in) dia
  • Samarium foil, 0.1mm (0.004in) thick
  • Samarium foil, 0.25mm (0.01in) thick
  • Samarium pieces, 12mm (0.47in) & down

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

Appearance
Silvery metal, rhombohedralexp.
Melting point
1,072 °Cexp.
Boiling point
1,794 °Cexp.
Density
7.52 g cm³ at 25 °Cexp.
Autoignition temperature
150 °Cexp.
Vapour pressure
1.3 × 10⁻⁵ bar at 722 mm Hg, 1.3 × 10⁻³ bar at 964 mm Hgexp.

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
150.36 g/molcalc.
Exact mass
151.9197 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

GHS signal word
Danger
GHS02: Flammable
Flammable

Hazard statements

  • H228Flammable solid.
  • H261In contact with water releases flammable gas.
Precautionary statements (8)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P231 + P232Handle and store contents under inert gas. Protect from moisture.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P402 + P404Store in a dry place. Store in a closed container.
  • P501Dispose of contents and container in accordance with local regulations.

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

Full safety data and first aid

Samarium suppliers

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

All 61 suppliers
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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

61 suppliers in 12 countries

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Samarium 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

Neutron absorber, dopant for laser crystals, metallurgical research, permanent magnets.

Used for carbon-arc lighting for the motion picture industry.

High thermal neutron absorption cross-section and high melting point ... make (it) ideal for use in nuclear control rod applications.

Industrial uses: Alloys.

How it is made

Reduction of ... (samarium) oxide with barium or lanthanum.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • Active ingredient in FDA approved drug labels

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2805.30Indicative HS code

Rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed

World exports in 2024
$385M
+7.4% vs 2023, imports $503M
2019 to 2024
Top exporters
  1. Vietnam * partner reported50.6%
  2. China24.9%
  3. Thailand17.1%
Top importers
  1. Japan49.0%
  2. Malaysia25.5%
  3. Vietnam * partner reported8.2%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for Samarium is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Samarium?

Samarium atom is a lanthanoid atom and a f-block element atom.

What is the CAS number of Samarium?

The CAS registry number of Samarium is 7440-19-9. Other or deprecated CAS numbers: 13598-53-3.

What is the molecular formula and weight of Samarium?

The molecular formula of Samarium is Sm and its molar mass is 150.36 g/mol.

What is Samarium used for?

Neutron absorber, dopant for laser crystals, metallurgical research, permanent magnets. Used for carbon-arc lighting for the motion picture industry. High thermal neutron absorption cross-section and high melting point ... make (it) ideal for use in nuclear control rod applications. Industrial uses: Alloys.

Is Samarium hazardous?

Samarium carries the GHS signal word "Danger". Main hazards: flammable solid, in contact with water releases flammable gas. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Samarium?

Samarium is usually classified under HS code 280530 (Rare-earth metals, scandium and yttrium, whether or not intermixed or interalloyed). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Samarium?

CompoundList lists 61 suppliers of Samarium in United States, China, Germany, Spain and 8 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Samarium?

Suppliers quote Samarium 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 Samarium

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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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