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Rare earth compounds

Dysprosium

Also known as Dy, Dysprosium Metallicum, dysprosium atom

CAS 7429-91-6Formula DyMolar mass 162.50 g/molEC 231-073-9
GHS signal word: Danger. Pictograms: Flammable, Harmful or irritant 49 suppliers listed Drug substance
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Element with atomic number and standard atomic weight

Key facts

What buyers check first

All properties
Physical form
Solid
Melting point
1,409 °C
Boiling point
2,335 °C
Density
8.54 @25 °C
HS code
280530
Category
Rare earth compounds
Illustrative photo, closed white HDPE bottles and amber jars on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Dysprosium?

Plain description, key identifiers and synonyms

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

Dysprosium is a chemical element with symbol Dy and atomic number 66.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
dysprosium
CAS number
7429-91-6 CAS number cross-checkedOther or deprecated CAS: 13537-09-2
EC number
231-073-9
Molecular formula
Dy
UNII
1D4N45714Q
MDL number
MFCD00010982
InChIKey
KBQHZAAAGSGFKK-UHFFFAOYSA-N
InChI
InChI=1S/Dy
SMILES (canonical and isomeric)
[Dy]

Synonyms

  • Dy
  • Dysprosium Metallicum
  • dysprosium atom
  • Dysprosium Ion
  • disprosio
  • Dysprosium powder
  • Dysprosium Standard: Dy @ 1000 microg/mL in 5% HNO3
  • Dysprosium Standard: Dy @ 10000 microg/mL in 5% HNO3
  • Element-Dy
  • Element:Dy
  • Dysprosium pieces
  • Atomic Dysprosium
  • Dysprosium element
  • Element Dysprosium
  • Element:Dysprosium
  • Dy (element)
  • Dysprosium standard
  • Dysprosium (atomic)
  • Dy Standard Solution
  • Dysprosium (element)
  • Dysprosium foil, 3N
  • Dysprosium chips, 3N
  • Dysprosium ingot, 3N
  • 66Dy
  • Dysprosium, elemental
Show all 37 synonyms
  • Dysprosium powder, -200 mesh
  • Dysprosium pieces, distilled dendritic
  • Dysprosium rod, 12.7mm (0.5in) dia
  • Dysprosium rod, 6.35mm (0.25in) dia
  • Dysprosium foil, 0.1mm (0.004in) thick
  • Dysprosium foil, 0.25mm (0.01in) thick
  • Dysprosium foil, 0.025mm (0.001in) thick
  • Dysprosium - Dy @ 1000 microg/mL in 5% HNO3
  • Dysprosium, rod, 50mm, diameter 2.0mm, cast, 99%
  • Dysprosium, rod, 50mm, diameter 6.35mm, cast, 99%
  • ICP standard Dysprosium 2-5% HNO3 1000 microg/mL
  • Dysprosium, rod, 100mm, diameter 6.35mm, cast, 99%

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.
Melting point
1,409 °Cexp.
Boiling point
2,335 °Cexp.
Density
8.54 @25 °Cexp.

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
162.50 g/molcalc.
Exact mass
163.9292 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
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H228Flammable solid.
  • H250Catches fire spontaneously if exposed to air.
  • H251Self-heating, may catch fire.
  • H252Self-heating in large quantities, may catch fire.
  • H260In contact with water releases flammable gases which may ignite spontaneously.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H413May cause long lasting harmful effects to aquatic life.
Precautionary statements (27)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P222Do not allow contact with air.
  • P223Do not allow contact with water.
  • P231Handle and store contents under inert gas.
  • P231 + P232Handle and store contents under inert gas. Protect from moisture.
  • P233Keep container tightly closed.
  • P235Keep cool.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P335 + P334If on skin: Brush off loose particles from skin. Immerse in cool water or wrap in wet bandages.
  • P302 + P352If on skin: Wash with plenty of water.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P402 + P404Store in a dry place. Store in a closed container.
  • P407Maintain air gap between stacks or pallets.
  • P410Protect from sunlight.
  • P413Store bulk masses at temperatures not exceeding the specified limit.
  • P420Store separately.
  • 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

Dysprosium suppliers

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

All 49 suppliers
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Where suppliers are based

49 suppliers in 13 countries

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Dysprosium price

Indicative price range per kg from live supplier offers

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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

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

Frequently asked questions

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

What is Dysprosium?

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

What is the CAS number of Dysprosium?

The CAS registry number of Dysprosium is 7429-91-6. Other or deprecated CAS numbers: 13537-09-2.

What is the molecular formula and weight of Dysprosium?

The molecular formula of Dysprosium is Dy and its molar mass is 162.50 g/mol.

Is Dysprosium hazardous?

Dysprosium carries the GHS signal word "Danger". Main hazards: flammable solid, catches fire spontaneously if exposed to air, self-heating, may catch fire. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Dysprosium?

Dysprosium 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 Dysprosium?

CompoundList lists 49 suppliers of Dysprosium 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 Dysprosium?

Suppliers quote Dysprosium 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 Dysprosium

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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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