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Rare earth compounds

Erbium

Also known as ER, Erbium metallicum, Erbium element

CAS 7440-52-0Formula ErMolar mass 167.26 g/molEC 231-160-1
GHS signal word: Danger. Pictograms: Flammable 51 suppliers listed Drug substance
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Element with atomic number and standard atomic weight

Key facts

What buyers check first

All properties
CAS number
7440-52-0
Formula
Er
Molar mass
167.26 g/mol
Physical form
Solid
HS code
280530
Category
Rare earth compounds
Illustrative photo, 25 kg white woven sacks of powder on a pallet in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Erbium?

Plain description, key identifiers and synonyms

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

Erbium is a chemical element with symbol Er and atomic number 68.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
erbium
CAS number
7440-52-0 CAS number cross-checkedOther or deprecated CAS: 13550-53-3
EC number
231-160-1
Molecular formula
Er
UNII
77B218D3YE
MDL number
MFCD00010987
InChIKey
UYAHIZSMUZPPFV-UHFFFAOYSA-N
InChI
InChI=1S/Er
SMILES (canonical and isomeric)
[Er]

Synonyms

  • ER
  • Erbium metallicum
  • Erbium element
  • Erbium foil
  • erbio
  • Erbium Standard: Er @ 1000 microg/mL in 5% HNO3
  • Erbium Standard: Er @ 10000 microg/mL in 5% HNO3
  • metallic erbium
  • erbium metal
  • Erbium pieces
  • Erbium powder
  • Element Erbium
  • Element:Erbium
  • elemental erbium
  • Erbium atom
  • Erbium chips
  • Erbium ingot
  • Atomic Erbium
  • Element-Er
  • Element:Er
  • Erbium (atomic)
  • Erbium (element)
  • Er (element)
  • Er Standard Solution
  • 68Er
Show all 37 synonyms
  • Ultra Thin Erbium Nanofoil
  • Erbium 99.9%
  • Erbium pieces, distilled dendritic
  • Erbium rod, 12.7mm (0.5in) dia
  • Erbium rod, 6.35mm (0.25in) dia
  • Erbium foil, 0.1mm (0.004in) thick
  • Erbium foil, 0.25mm (0.01in) thick
  • Erbium foil, 0.62mm (0.024in) thick
  • Erbium foil, 0.025mm (0.001in) thick
  • Erbium - Er @ 1000 microg/mL in 5% HNO3
  • Erbium, rod, 50mm, diameter 2.0mm, cast, 99%
  • ICP standard Erbium 2-5% HNO3 1000 microg/mL

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

Physical form
Solidexp.

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
167.26 g/molcalc.
Exact mass
165.9303 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.
Precautionary statements (5)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • 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.

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

Erbium suppliers

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

All 51 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

51 suppliers in 13 countries

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Erbium 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

Pharmacology

Erbium is an element with atomic symbol Er, atomic number 68, and atomic weight 167.259.

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 Erbium 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 Erbium is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Erbium?

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

What is the CAS number of Erbium?

The CAS registry number of Erbium is 7440-52-0. Other or deprecated CAS numbers: 13550-53-3.

What is the molecular formula and weight of Erbium?

The molecular formula of Erbium is Er and its molar mass is 167.26 g/mol.

Is Erbium hazardous?

Erbium carries the GHS signal word "Danger". Main hazards: flammable solid. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Erbium?

Erbium 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 Erbium?

CompoundList lists 51 suppliers of Erbium in United States, China, Germany, Spain and 9 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 Erbium?

Suppliers quote Erbium 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 Erbium

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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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