See research below. American Elements specializes in producing Dysprosium as rolled sheets in various thicknesses and sizes. Most sheets are produced from cast Ingots for use in coating and thin film Chemical Vapor Deposition (CVD) and Physical Vapor Deposition (PVD) processes including Thermal and Electron Beam (E-Beam) Evaporation, Low Temperature Organic Evaporation, Atomic Layer Deposition (ALD), Organometallic and Chemical Vapor Deposition (MOCVD) for specific applications such as fuel cells and solar energy. Thickness can range from 0.04" to 0.25" for all metals. Materials are produced using crystallization, solid state and other ultra high purification processes such as sublimation. American Elements specializes in producing custom compositions for commercial and research applications and for new proprietary technologies. American Elements also casts any of the rare earth metals and most other advanced materials into rod, bar or plate form, as well as other machined shapes and through other processes such as nanoparticles (See also application discussion at Nanotechnology Information and at Quantum Dots) and in the form of solutions and organometallics. Dysprosium metal is used in rare earth magnet alloys and magnesium alloys. Due to dysprosium and its compounds high susceptibility to magnetization, they are used in a variety of data storage applications, such as in compact discs.American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopeia/British Pharmacopeia) and follows applicable ASTM testing standards. We also produce Dysprosium as rods, powder and plates. Other shapes are available by request.
Dysprosium is a Block F, Group 3, Period 6 element. The number of electrons in each of Dysprosium's shells is 2, 8, 18, 28, 8, 2 and its electronic configuration is [Xe] 4f10 6s2. In its elemental form dysprosium's CAS number is 7429-91-6. The dysprosium atom has a radius of 175.2.pm and it's Van der Waals radius is unknown. Dysprosium is moderately toxic. Dysprosium is most commonly used in neodymium-iron-boron high strength permanent magnets. Dysprosium is available as metal and compounds with purities from 99% to 99.999% (ACS grade to ultra-high purity); metals in the form of foil, sputtering target, and rod, and compounds as submicron and nanopowder. While it has one of the highest magnetic moments of any of the rare earths (10.6µB), this has not resulted in an ability to perform on its own as a practical alternative to neodymium compositions. It is however now an essential additive in NdFeB production. It is also used in special ceramic compositions based on BaTiO formulations. Recent research has examined the use of dysprosium in dysprosium-iron-garnet (DyIG) and silicon implanted with dysprosium and holmium to form donor centers. Dysprosium is added to various advanced optical formulations due to the fact that it emits in the 470-500 and 570-600 nm wavelengths. Dysprosium was first discovered by Paul Emile Lecoq de Boisbaudran in 1886. The element name originates from the Greek word 'dysprositos' meaning hard to get at. See Dysprosium research below.
PACKAGING SPECIFICATIONS FOR BULK & RESEARCH QUANTITIES
Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Material Safety Data Sheet (MSDS). Bullion and bar forms are best if purchasing solely for physical possession and risk exposure.
Selected Trace Elements in the Sacramento River, California: Occurrence and Distribution.
Taylor HE, Antweiler RC, Roth DA, Alpers CN, Dileanis P.
Arch Environ Contam Toxicol. 2011 Dec 23. [Epub ahead of print]
PMID:
22193863
[PubMed - as supplied by publisher]
High energy electron beams characterization using CaSO(4):Dy+PTFE Phosphors for clinical therapy applications.
Rivera T, Espinoza A, Von SM, Alvarez R, Jiménez Y.
Appl Radiat Isot. 2011 Dec 13. [Epub ahead of print]
PMID:
22182630
[PubMed - as supplied by publisher]
Strongly dipolar bose-einstein condensate of dysprosium.
Lu M, Burdick NQ, Youn SH, Lev BL.
Phys Rev Lett. 2011 Nov 4;107(19):190401. Epub 2011 Oct 31.
PMID:
22181585
[PubMed - in process]
Lipophilic phosphonium-lanthanide compounds with magnetic, luminescent, and tumor targeting properties.
Li M, Ganea GM, Lu C, De Rooy SL, El-Zahab B, Fernand VE, Jin R, Aggarwal S, Warner IM.
J Inorg Biochem. 2011 Nov 3;107(1):40-46. [Epub ahead of print]
PMID:
22172501
[PubMed - as supplied by publisher]
Differential genotoxicity of chemical properties and particle size of rare metal and metal oxide nanoparticles.
Hasegawa G, Shimonaka M, Ishihara Y.
J Appl Toxicol. 2012 Jan;32(1):72-80. doi: 10.1002/jat.1719. Epub 2011 Aug 23.
PMID:
22162085
[PubMed - in process]
A Discrete Dysprosium Trigonal Prism Showing Single-Molecule Magnet Behaviour.
Tian H, Wang M, Zhao L, Guo YN, Guo Y, Tang J, Liu Z.
Chemistry. 2011 Dec 12. doi: 10.1002/chem.201102547. [Epub ahead of print]
PMID:
22161973
[PubMed - as supplied by publisher]
Synthesis, characterisation and magnetic study of a cyano-substituted dysprosium double decker single-molecule magnet.
Waters M, Moro F, Krivokapic I, McMaster J, Slageren JV.
Dalton Trans. 2011 Dec 6. [Epub ahead of print]
PMID:
22146842
[PubMed - as supplied by publisher]
Molecular Structure and Vibrational Spectra of Mixed MDyX(4) (M = Li, Na, K, Rb, Cs; X = F, Cl, Br, I) Vapor Complexes: A Computational and Matrix-Isolation Infrared Spectroscopic Study.
Groen CP, Kovács A, Varga Z, Hargittai M.
Inorg Chem. 2011 Dec 2. [Epub ahead of print]
PMID:
22136352
[PubMed - as supplied by publisher]
Quadruple-CO(3)(2-) bridged octanuclear dysprosium(iii) compound showing single-molecule magnet behaviour.
Tian H, Zhao L, Guo YN, Guo Y, Tang J, Liu Z.
Chem Commun (Camb). 2012 Jan 18;48(5):708-10. Epub 2011 Dec 1.
PMID:
22129652
[PubMed - in process]
Salen-based coordination polymers of iron and the rare Earth elements.
Bhunia A, Lan Y, Mereacre V, Gamer MT, Powell AK, Roesky PW.
Inorg Chem. 2011 Dec 19;50(24):12697-704. Epub 2011 Nov 14.
PMID:
22082051
[PubMed - in process]
Novel lanthanide-based polymeric chains and corresponding ultrafast dynamics in solution.
Thielemann DT, Klinger M, Wolf TJ, Lan Y, Wernsdorfer W, Busse M, Roesky PW, Unterreiner AN, Powell AK, Junk PC, Deacon GB.
Inorg Chem. 2011 Dec 5;50(23):11990-2000. Epub 2011 Nov 8.
PMID:
22066577
[PubMed - in process]
Tetra-kis(?-2-phen-oxy-propionato)-?O,O':O';?O:O,O',?O:O'-bis-[(1,10-phenanthroline-?N,N')(2-phen-oxy-propionato-?O,O')praseodymium(III)].
Shen JB, Liu JL, Zhao GL.
Acta Crystallogr Sect E Struct Rep Online. 2011 Sep 1;67(Pt 9):m1321. Epub 2011 Aug 31.
PMID:
22058896
[PubMed]
Tetra-kis(?-2-phen-oxy-propionato)-?O,O':O';?O:O,O',?O:O'-bis-[(1,10-phenanthroline-?N,N')(2-phen-oxy-propionato-?O,O')dysprosium(III)].
Shen JB, Liu JL, Zhao GL.
Acta Crystallogr Sect E Struct Rep Online. 2011 Sep 1;67(Pt 9):m1320. Epub 2011 Aug 31.
PMID:
22058895
[PubMed]
An organometallic sandwich lanthanide single-ion magnet with an unusual multiple relaxation mechanism.
Jeletic M, Lin PH, Le Roy JJ, Korobkov I, Gorelsky SI, Murugesu M.
J Am Chem Soc. 2011 Dec 7;133(48):19286-9. Epub 2011 Nov 11.
PMID:
22032273
[PubMed - in process]
A tetragonal form of dysprosium orthomolybdate at room temperature.
Dorzhieva S, Chumak I, Sarapulova A, Mikhailova D, Bazarova J, Ehrenberg H.
Acta Crystallogr C. 2011 Oct;67(Pt 10):i50-2. Epub 2011 Sep 15.
PMID:
21979965
[PubMed - in process]
Note: simple means for selective removal of the 365 nm line from the Hg spectrum using Dy.
Vesborg PC, Chorkendorff I, Brock-Nannestad T, Dethlefsen JR, Bendix J.
Rev Sci Instrum. 2011 Sep;82(9):096102.
PMID:
21974629
[PubMed - in process]
Effects of chronic ?-irradiation on the aquatic microbial microcosm: equi-dosimetric comparison with effects of heavy metals.
Fuma S, Kawaguchi I, Kubota Y, Yoshida S, Kawabata Z, Polikarpov GG.
J Environ Radioact. 2012 Feb;103(2):81-6. Epub 2011 Sep 29.
PMID:
21962482
[PubMed - in process]
Cool White Light Emission in Dysprosium and Salicylic Acid Doped Poly Vinyl Alcohol Film Under UV Excitation.
Kaur G, Rai SB.
J Fluoresc. 2011 Sep 27. [Epub ahead of print]
PMID:
21947610
[PubMed - as supplied by publisher]
[Synthesis, crystal structure and luminescent properties of a dysprosium coordinaation polymer based on pyridine-2, 6-dicarboxylic acid].
Fan RQ, Wang P, Ren JY, Zhou GP, Yang YL.
Guang Pu Xue Yu Guang Pu Fen Xi. 2011 Jul;31(7):1734-8. Chinese.
PMID:
21942013
[PubMed - in process]
Anisotropic dysprosium.
Gatteschi D.
Nat Chem. 2011 Sep 23;3(10):830. doi: 10.1038/nchem.1157. No abstract available.
PMID:
21941259
[PubMed - indexed for MEDLINE]
Material Safety Data Sheet
1 Identification of substance
Product details
Trade name Dysprosium metal
2 Composition/Data on components:
Chemical characterization: Designation: (CAS#)
Dysprosium (CAS# 7429-91-6), 100%
Identification number(s):
EINECS Number: 231-073-9
3 Hazards identification
Hazard designation: F Highly flammable
Information pertaining to particular dangers for man and environment
R 11 Highly flammable.
R 15 Contact with water liberates extremely flammable gases.
4 First aid measures
After inhalation
Supply fresh air. If required, provide artificial respiration. Keep patient warm. Consult doctor if symptoms persist.
Seek immediate medical advice.
After skin contact
Instantly wash with water and soap and rinse thoroughly.
Seek immediate medical advice.
After eye contact
Rinse opened eye for several minutes under running water. Then consult doctor.
After swallowing Seek immediate medical advice.
5 Fire fighting measures
Suitable extinguishing agents Extinguishing powder. Do not use water.
For safety reasons unsuitable extinguishing agents
Water.
Halocarbon extinguisher
Special hazards caused by the material, its products of combustion or flue gases:
Contact with water releases hydrogen (explosive).
Protective equipment:
Wear self-contained breathing apparatus.
Wear full protective suit.
Measures for environmental protection:
Do not allow material to be released to the environment without proper governmental permits.
Measures for cleaning/collecting:
Ensure adequate ventilation.
Do not flush with water or aqueous cleansing agents
Keep away from ignition sources.
Additional information:
See Section 7 for information on safe handling
See section 8 for information on personal protection equipment.
See Section 13 for information on disposal.
7 Handling and storage
Handling
Information for safe handling:
Keep containers tightly sealed.
Store in cool, dry place in tightly closed containers.
Ensure good ventilation/exhaustion at the workplace.
Open and handle container with care.
Information about protection against explosions and fires:
Keep ignition sources away - Do not smoke.
Protect against electrostatic charges.
Fumes can combine with air to form an explosive mixture.
Storage
Requirements to be met by storerooms and containers:
Store in cool location.
Information about storage in one common storage facility:
Store away from water.
Do not store together with oxidizing and acidic materials.
Store away from halogens.
Further information about storage conditions:
Store in petroleum or under dry argon.
Protect from humidity and keep away from water.
Keep container tightly sealed.
Store in cool, dry conditions in well sealed containers.
8 Exposure controls and personal protection
Additional information about design of technical systems:
Properly operating chemical fume hood designed for hazardous chemicals and having an average face velocity of at least 100 feet per minute.
Components with critical values that require monitoring at the workplace:
Not required.
Additional information: No data
Personal protective equipment
General protective and hygienic measures
The usual precautionary measures should be adhered to in handling the chemicals.
Keep away from foodstuffs, beverages and food.
Instantly remove any soiled and impregnated garments.
Wash hands during breaks and at the end of the work.
Breathing equipment: Use breathing protection with high concentrations.
Protection of hands: Impervious gloves
Eye protection:
Safety glasses
Full face protection
Face protection
Body protection: Protective work clothing.
9 Physical and chemical properties:
General Information
Form: Solid.
Colour: Silver-coloured
Smell: Odourless
Value/Range Unit Method
Change in condition
Melting point/Melting range: 1407 ° C
Boiling point/Boiling range: 2600 ° C
Sublimation temperature / start: Not determined
Flash point: Not applicable
Inflammability (solid, gaseous) Highly flammable.
Contact with water liberates extremely flammable gases.
Ignition temperature: Not determined
Decomposition temperature: Not determined
Critical values for explosion:
Lower: Not determined
Upper: Not determined
Steam pressure: Not determined
Density at 20 ° C 8.54 g/cm³
Solubility in / Miscibility with
Water: Not determined
10 Stability and reactivity
Thermal decomposition / conditions to be avoided:
No decomposition if used and stored according to specifications.
Materials to be avoided:
Oxidizing agents
Water/moisture
Acids
Halogens
Air
Dangerous reactions: Contact with water releases flammable gases
Dangerous products of decomposition: Hydrogen
11 Toxicological information
Acute toxicity:
Primary irritant effect:
on the skin: Irritant for skin and mucous membranes.
on the eye: Irritant effect.
Sensitization: No sensitizing effect known.
Additional toxicological information:
To the best of our knowledge the acute and chronic toxicity of this substance is not fully known.
12 Ecological information:
General notes:
Do not allow material to be released to the environment without proper governmental permits.
Water hazard class 1 (Self-assessment): slightly hazardous for water.
Do not allow undiluted product or large quantities of it to reach ground water, water bodies or sewage system.
13 Disposal considerations
Product:
Recommendation
Consult state, local or national regulations for proper disposal.
Hand over to disposers of hazardous waste.
Must be specially treated under adherence to official regulations.
Uncleaned packagings:
Recommendation:
Disposal must be made according to official regulations.
14 Transport information
Land transport ADR/RID and GGVS/GGVE (cross-border/domestic)
ADR/RID-GGVS/E Class: 4.1 (F3) Flammable solids.
Kemler Number: 40
UN-Number: 3178
Packaging group: III
Label 4.1
Designation of goods: 3178 FLAMMABLE SOLID, INORGANIC, N.O.S.
(dysprosium)
Code letter and hazard designation of product: F Highly flammable
Risk phrases:
11 Highly flammable.
15 Contact with water liberates extremely flammable gases.
National regulations
Information about limitation of use:
For use only by technically qualified individuals.
Employment restrictions concerning young persons must be observed.
Water hazard class:
Water hazard class 1 (Self-assessment): slightly hazardous for water.
16 Other information:
Employers should use this information only as a supplement to other information gathered by them, and should make independent judgement of suitability of this information to ensure proper use and protect the health and safety of employees. This information is furnished without warranty, and any use of the product not in conformance with this Material Safety Data Sheet, or in combination with any other product or process, is the responsibility of the user.
Selected Trace Elements in the Sacramento River, California: Occurrence and Distribution.
Taylor HE, Antweiler RC, Roth DA, Alpers CN, Dileanis P.
Arch Environ Contam Toxicol. 2011 Dec 23. [Epub ahead of print]
PMID:
22193863
[PubMed - as supplied by publisher]
High energy electron beams characterization using CaSO(4):Dy+PTFE Phosphors for clinical therapy applications.
Rivera T, Espinoza A, Von SM, Alvarez R, Jiménez Y.
Appl Radiat Isot. 2011 Dec 13. [Epub ahead of print]
PMID:
22182630
[PubMed - as supplied by publisher]
Strongly dipolar bose-einstein condensate of dysprosium.
Lu M, Burdick NQ, Youn SH, Lev BL.
Phys Rev Lett. 2011 Nov 4;107(19):190401. Epub 2011 Oct 31.
PMID:
22181585
[PubMed - in process]
Lipophilic phosphonium-lanthanide compounds with magnetic, luminescent, and tumor targeting properties.
Li M, Ganea GM, Lu C, De Rooy SL, El-Zahab B, Fernand VE, Jin R, Aggarwal S, Warner IM.
J Inorg Biochem. 2011 Nov 3;107(1):40-46. [Epub ahead of print]
PMID:
22172501
[PubMed - as supplied by publisher]
Differential genotoxicity of chemical properties and particle size of rare metal and metal oxide nanoparticles.
Hasegawa G, Shimonaka M, Ishihara Y.
J Appl Toxicol. 2012 Jan;32(1):72-80. doi: 10.1002/jat.1719. Epub 2011 Aug 23.
PMID:
22162085
[PubMed - in process]
A Discrete Dysprosium Trigonal Prism Showing Single-Molecule Magnet Behaviour.
Tian H, Wang M, Zhao L, Guo YN, Guo Y, Tang J, Liu Z.
Chemistry. 2011 Dec 12. doi: 10.1002/chem.201102547. [Epub ahead of print]
PMID:
22161973
[PubMed - as supplied by publisher]
Synthesis, characterisation and magnetic study of a cyano-substituted dysprosium double decker single-molecule magnet.
Waters M, Moro F, Krivokapic I, McMaster J, Slageren JV.
Dalton Trans. 2011 Dec 6. [Epub ahead of print]
PMID:
22146842
[PubMed - as supplied by publisher]
Molecular Structure and Vibrational Spectra of Mixed MDyX(4) (M = Li, Na, K, Rb, Cs; X = F, Cl, Br, I) Vapor Complexes: A Computational and Matrix-Isolation Infrared Spectroscopic Study.
Groen CP, Kovács A, Varga Z, Hargittai M.
Inorg Chem. 2011 Dec 2. [Epub ahead of print]
PMID:
22136352
[PubMed - as supplied by publisher]
Quadruple-CO(3)(2-) bridged octanuclear dysprosium(iii) compound showing single-molecule magnet behaviour.
Tian H, Zhao L, Guo YN, Guo Y, Tang J, Liu Z.
Chem Commun (Camb). 2012 Jan 18;48(5):708-10. Epub 2011 Dec 1.
PMID:
22129652
[PubMed - in process]
Salen-based coordination polymers of iron and the rare Earth elements.
Bhunia A, Lan Y, Mereacre V, Gamer MT, Powell AK, Roesky PW.
Inorg Chem. 2011 Dec 19;50(24):12697-704. Epub 2011 Nov 14.
PMID:
22082051
[PubMed - in process]
Novel lanthanide-based polymeric chains and corresponding ultrafast dynamics in solution.
Thielemann DT, Klinger M, Wolf TJ, Lan Y, Wernsdorfer W, Busse M, Roesky PW, Unterreiner AN, Powell AK, Junk PC, Deacon GB.
Inorg Chem. 2011 Dec 5;50(23):11990-2000. Epub 2011 Nov 8.
PMID:
22066577
[PubMed - in process]
Tetra-kis(?-2-phen-oxy-propionato)-?O,O':O';?O:O,O',?O:O'-bis-[(1,10-phenanthroline-?N,N')(2-phen-oxy-propionato-?O,O')praseodymium(III)].
Shen JB, Liu JL, Zhao GL.
Acta Crystallogr Sect E Struct Rep Online. 2011 Sep 1;67(Pt 9):m1321. Epub 2011 Aug 31.
PMID:
22058896
[PubMed]
Tetra-kis(?-2-phen-oxy-propionato)-?O,O':O';?O:O,O',?O:O'-bis-[(1,10-phenanthroline-?N,N')(2-phen-oxy-propionato-?O,O')dysprosium(III)].
Shen JB, Liu JL, Zhao GL.
Acta Crystallogr Sect E Struct Rep Online. 2011 Sep 1;67(Pt 9):m1320. Epub 2011 Aug 31.
PMID:
22058895
[PubMed]
An organometallic sandwich lanthanide single-ion magnet with an unusual multiple relaxation mechanism.
Jeletic M, Lin PH, Le Roy JJ, Korobkov I, Gorelsky SI, Murugesu M.
J Am Chem Soc. 2011 Dec 7;133(48):19286-9. Epub 2011 Nov 11.
PMID:
22032273
[PubMed - in process]
A tetragonal form of dysprosium orthomolybdate at room temperature.
Dorzhieva S, Chumak I, Sarapulova A, Mikhailova D, Bazarova J, Ehrenberg H.
Acta Crystallogr C. 2011 Oct;67(Pt 10):i50-2. Epub 2011 Sep 15.
PMID:
21979965
[PubMed - in process]
Note: simple means for selective removal of the 365 nm line from the Hg spectrum using Dy.
Vesborg PC, Chorkendorff I, Brock-Nannestad T, Dethlefsen JR, Bendix J.
Rev Sci Instrum. 2011 Sep;82(9):096102.
PMID:
21974629
[PubMed - in process]
Effects of chronic ?-irradiation on the aquatic microbial microcosm: equi-dosimetric comparison with effects of heavy metals.
Fuma S, Kawaguchi I, Kubota Y, Yoshida S, Kawabata Z, Polikarpov GG.
J Environ Radioact. 2012 Feb;103(2):81-6. Epub 2011 Sep 29.
PMID:
21962482
[PubMed - in process]
Cool White Light Emission in Dysprosium and Salicylic Acid Doped Poly Vinyl Alcohol Film Under UV Excitation.
Kaur G, Rai SB.
J Fluoresc. 2011 Sep 27. [Epub ahead of print]
PMID:
21947610
[PubMed - as supplied by publisher]
[Synthesis, crystal structure and luminescent properties of a dysprosium coordinaation polymer based on pyridine-2, 6-dicarboxylic acid].
Fan RQ, Wang P, Ren JY, Zhou GP, Yang YL.
Guang Pu Xue Yu Guang Pu Fen Xi. 2011 Jul;31(7):1734-8. Chinese.
PMID:
21942013
[PubMed - in process]
Anisotropic dysprosium.
Gatteschi D.
Nat Chem. 2011 Sep 23;3(10):830. doi: 10.1038/nchem.1157. No abstract available.
PMID:
21941259
[PubMed - indexed for MEDLINE]
See research below. American Elements specializes in producing Dysprosium as rolled sheets in various thicknesses and sizes. Most sheets are produced from cast Ingots for use in coating and thin film Chemical Vapor Deposition (CVD) and Physical Vapor Deposition (PVD) processes including Thermal and Electron Beam (E-Beam) Evaporation, Low Temperature Organic Evaporation, Atomic Layer Deposition (ALD), Organometallic and Chemical Vapor Deposition (MOCVD) for specific applications such as fuel cells and solar energy. Thickness can range from 0.04" to 0.25" for all metals. Materials are produced using crystallization, solid state and other ultra high purification processes such as sublimation. American Elements specializes in producing custom compositions for commercial and research applications and for new proprietary technologies. American Elements also casts any of the rare earth metals and most other advanced materials into rod, bar or plate form, as well as other machined shapes and through other processes such as nanoparticles (See also application discussion at Nanotechnology Information and at Quantum Dots) and in the form of solutions and organometallics. Dysprosium metal is used in rare earth magnet alloys and magnesium alloys. Due to dysprosium and its compounds high susceptibility to magnetization, they are used in a variety of data storage applications, such as in compact discs.American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopeia/British Pharmacopeia) and follows applicable ASTM testing standards. We also produce Dysprosium as rods, powder and plates. Other shapes are available by request.
Dysprosium is a Block F, Group 3, Period 6 element. The number of electrons in each of Dysprosium's shells is 2, 8, 18, 28, 8, 2 and its electronic configuration is [Xe] 4f10 6s2. In its elemental form dysprosium's CAS number is 7429-91-6. The dysprosium atom has a radius of 175.2.pm and it's Van der Waals radius is unknown. Dysprosium is moderately toxic. Dysprosium is most commonly used in neodymium-iron-boron high strength permanent magnets. Dysprosium is available as metal and compounds with purities from 99% to 99.999% (ACS grade to ultra-high purity); metals in the form of foil, sputtering target, and rod, and compounds as submicron and nanopowder. While 
it has one of the highest magnetic moments of any of the rare earths (10.6µB), this has not resulted in an ability to perform on its own as a practical alternative to neodymium compositions. It is
however now an essential additive in NdFeB production. It is also used in special ceramic compositions based on BaTiO formulations. Recent research has examined the use of dysprosium in dysprosium-iron-garnet (DyIG) and silicon implanted with dysprosium and holmium to form donor centers. Dysprosium is added to various advanced optical formulations due to the fact that it emits in the 470-500 and 570-600 nm wavelengths. Dysprosium was first discovered by Paul Emile Lecoq de Boisbaudran in 1886. The element name originates from the Greek word 'dysprositos' meaning hard to get at. See Dysprosium research below.
