Holmium Sulfate, Holmium Sesquisulfate, Holmium Sulfate Hydrate, Holmium Trisulfate, 15622‑40‑9

HOLMIUM SULFATE 

1. PRODUCT IDENTIFICATION AND CHEMICAL IDENTITY

2. CHEMICAL STRUCTURE

2.1. Molecular Structure

Holmium sulfate is the sulfate salt of holmium. Holmium ions (Ho³⁺) and sulfate ions (SO₄²⁻) are present in a 2:3 ratio. The compound typically exists as a hydrate with variable water content. It is hygroscopic and readily absorbs moisture from the air. Holmium salts are characterized by their light yellow-pink coloration due to the electronic configuration of the Ho³⁺ ion.

Structural Formula:

                    HOLMIUM SULFATE [Ho₂(SO₄)₃·xH₂O]
                               |
                     Ho³⁺ - SO₄²⁻ Ionic Bonds
                               |
             +----------------+----------------+
             |                |                |
         Ionic Crystal       Hygroscopic       Acidic
         Structure           Property          Salt

2.2. Structural Properties

3. PHYSICAL AND CHEMICAL PROPERTIES

4. STABILITY AND REACTIVITY

4.1. Chemical Reactions

Thermal Decomposition:

Ho₂(SO₄)₃·xH₂O → Ho₂O₃ + 3SO₃↑ + xH₂O↑

Reaction with Alkali:

Ho₂(SO₄)₃ + 6NaOH → 2Ho(OH)₃↓ + 3Na₂SO₄

Reaction with Phosphate:

Ho₂(SO₄)₃ + 2Na₃PO₄ → 2HoPO₄↓ + 3Na₂SO₄

5. APPLICATION AREAS

5.1. Production of Holmium Compounds (Precursor)

5.2. Laser Technology

5.3. Magnetic Materials

5.4. Electronics and Photonics

5.5. Laboratory and Research

6. SECTOR SUITABILITY TABLE

7. STORAGE AND SHELF LIFE

8. PACKAGING OPTIONS

9. SAFETY AND TOXICOLOGY

10. GHS CLASSIFICATION

Signal Word: WARNING

Hazard Pictograms: GHS07 (Exclamation Mark)

11. PRECAUTIONARY STATEMENTS (P-CODES)

12. FIRST AID MEASURES

13. REGULATORY STATUS

14. OTHER NAMES AND SYNONYMS

• Holmium(III) Sulfate

• Holmium Sesquisulfate

• Holmium Trisulfate

• Holmium Sulfate Hydrate

• Ho₂(SO₄)₃·xH₂O

15. QUICK REFERENCE TABLE

16. CRITICAL NOTICES AND BEST PRACTICES

CRITICAL NOTICES:

1. Holmium sulfate is highly hygroscopic. Must be stored in moisture-proof containers with desiccant.

2. Protect from light to prevent degradation.

3. Decomposes at high temperatures to holmium oxide (Ho₂O₃), releasing sulfur oxides.

4. Causes skin and eye irritation. Use appropriate personal protective equipment.

5. Dust may cause respiratory irritation. Use in well-ventilated areas.

6. Primarily used in research, laser technology, magnetic materials, and optical applications.

7. Holmium has strong magnetic properties, making its compounds valuable for magnetic refrigeration and specialty magnet applications.

BEST PRACTICE RECOMMENDATIONS:

Storage:

• Store in a cool, dry, well-ventilated area

• Use sealed, moisture-proof containers with desiccant

• Protect from light

• Store at room temperature (15-25°C)

Handling:

• Use in well-ventilated areas

• Use dust mask, protective goggles, and gloves

• Avoid dust formation

• Wash hands after handling

• Immediately reseal container after use

Waste Management:

• Dispose in accordance with local regulations

• Consider rare earth recovery for large quantities

LEGAL DISCLAIMER

This Technical Data Sheet (TDS) is for informational purposes only and is prepared based on available technical data. The user is solely responsible for determining the suitability of the product for their specific application and for complying with all local, national, and international regulations. For complete safety, storage, handling, transport, waste, and regulatory compliance information, the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier must be consulted. This document does not substitute professional advice. Holmium sulfate is a specialty rare earth compound; appropriate precautions must be taken during handling.