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12055-62-8

Basic Information
CAS No.: 12055-62-8
Name: Holmium oxide
Molecular Structure:
Molecular Structure of 12055-62-8 (Holmium oxide)
Formula: Ho2O3
Molecular Weight: 377.86
Synonyms: Holmium oxide (Ho2O3);Holmium(+3) cation; oxygen(-2) anion;Holmium(III) oxide;
EINECS: 235-015-3
Density: 1.0966 g/mL at 25 °C
Melting Point: >100 °C(lit.)
Boiling Point:
Flash Point:
Solubility: Insoluble in water, soluble in acids
Appearance: slightly beige solid
Hazard Symbols:
Risk Codes:
Safety: 22-24/25
Transport Information:
PSA: 43.37000
LogP: -0.30600
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    Prime Molecular Co., Ltd. is an advanced chemical intermediates manufacture with ?two R&D centers and two production sites in China, all well-equipped with dedicated and profession

  •  PRIME MOLECULAR CO.,LIMITED

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  • Holmium oxide manufacturer

  • Casno:

    12055-62-8

    Holmium oxide manufacturer

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    Known for its best quality and competitve price, this chemicals we offered is widely appreciated by our customers.Appearance:White powder Storage:keep sealed and keep from direct light Package:According client's requirements Application:pharmaceutica

    Shanghai Yuanye Bio-Technology Co., Ltd. is a comprehensive enterprise of life science, specializing in the research, development and sales of biochemical reagents, analytical stan

  •  Shanghai Yuanye Bio-Technology Co., Ltd.

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    Tel:+86-21-67811725

    Address:Building 6, No. 465, Changta Road,Songjiang District,Shanghai,China

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  • Holmium oxide

  • Casno:

    12055-62-8

    Holmium oxide

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    Best Seller, High Quality, Competitive Price, Fast Delivery, Quick ResponseAppearance:powder, or liquid Storage:Stored in room temperature, ventilated place Package:Bottle, barrel, cargo, container, etc. Application:Pharmaceuticals, intermediates, AP

  •  LEAP CHEM Co., Ltd.

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  • Holmium(III) oxide

  • Casno:

    12055-62-8

    Holmium(III) oxide

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    Has its own laboratory, R & D and production, spot Package:250mg Application:As an auxiliary additive, used as medicine, food fine chemical industry

    北京谨明生物科技有限公司 联系电话: 15801484223;18511084608 联系传真: - Email: yvhfjjp@163.com 网址: www.chemicalbook.com/ShowSupplierProductsList19924/0.htm BOOK1

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Specification

The Holmium oxide, with the CAS registry number 12055-62-8, is also known as Holmium(III) oxide. It belongs to the product categories of Rare earth; 67: Ho; Holmium Materials Science; Catalysis and Inorganic Chemistry; Chemical Synthesis; Holmium Metal and Ceramic Science; Nanomaterials; Nanoparticles: Oxides, Nitrides, and Other Ceramics Nanomaterials; Nanopowders and Nanoparticle Dispersions; Oxides; Metal oxide. Its EINECS number is 235-015-3. This chemical's molecular formula is Ho2O3 and molecular weight is 377.86. What's more, its systematic name is Holmium(+3) cation; oxygen(-2) anion. This chemical is stable at common pressure and temperature, and it should be sealed and stored in a ventilated and dry place. Moreover, it should be protected from moisture, air and acids. You should not breathe dust. When using it, you must avoid contact with skin and eyes. It is one of the colorants used for cubic zirconia and glass, providing yellow or red coloring. As most other oxides of rare-earth elements, holmium oxide is used as a specialty catalyst, phosphor and a laser material. 

Preparation: this chemical can be prepared as follows: the mineral mixtures are crushed and ground. Monazite, because of its magnetic properties can be separated by repeated electromagnetic separation. After separation, it is treated with hot concentrated sulfuric acid to produce water-soluble sulfates of several rare earth elements. The acidic filtrates are partially neutralized with sodium hydroxide to pH 3-4. Thorium precipitates out of solution as hydroxide and is removed. After that, the solution is treated with ammonium oxalate to convert rare earths in to their insoluble oxalates. The oxalates are converted to oxides by annealing. The oxides are dissolved in nitric acid that excludes one of the main components, cerium, whose oxide is insoluble in HNO3. The most efficient separation routine for holmium oxide from the rare-earths is ion exchange. In this process, rare-earth ions are adsorbed onto suitable ion-exchange resin by exchange with hydrogen, ammonium or cupric ions present in the resin. The rare earth ions are then selectively washed out by suitable complexing agent, such as ammonium citrate or nitrilotracetate.