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Send EmailHolmium Acetate, Holmium Triacetate, Holmium Acetate Hydrate, 25519‑09‑9
| Parameter | Information |
|---|---|
| Product Name | Holmium Acetate |
| Chemical Name | Holmium(III) Acetate |
| Other Names | Holmium Triacetate, Holmium Acetate Hydrate |
| CAS Number | 25519-09-9 |
| EC Number | Not available |
| HS Code | 291529 |
| Molecular Formula | Ho(CH₃COO)₃·xH₂O (typically hydrated form) |
| Molecular Weight | ~292 g/mol (anhydrous basis) |
| Purity | ≥ 99% (rare earth purity) |
| Appearance | Light yellow-pink crystalline solid |
| Odor | Slight acetic acid odor |
| Physical State (20°C) | Solid (crystalline) |
Holmium acetate is the acetate salt of holmium. Holmium ions (Ho³⁺) and acetate ions (CH₃COO⁻) are present in a 1:3 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 unique electronic configuration of the Ho³⁺ ion.
Structural Formula:
HOLMIUM ACETATE [Ho(CH₃COO)₃·xH₂O]
|
Ho³⁺ - CH₃COO⁻ Ionic Bonds
|
+----------------+----------------+
| | |
Organic Salt Hygroscopic Acidic
Structure Property Salt
| Parameter | Value |
|---|---|
| Oxidation State | Ho³⁺ (Holmium +3) |
| Molecular Weight | ~292 g/mol (anhydrous) |
| Water Content | Variable (typically x = 4) |
| Appearance | Light yellow-pink crystalline solid |
| Density | ~2.5–2.7 g/cm³ |
| pH (aqueous solution) | Slightly acidic |
| Color Origin | f-f transitions of Ho³⁺ ion |
| Property | Value | Description |
|---|---|---|
| Appearance | Light yellow-pink crystalline solid | - |
| Odor | Slight acetic acid odor | - |
| Chemical Formula | Ho(CH₃COO)₃·xH₂O | - |
| Molecular Weight | ~292 g/mol (anhydrous) | - |
| Density | ~2.5–2.7 g/cm³ | - |
| Melting Point | Decomposes upon heating | - |
| Solubility in Water | Soluble | - |
| Solubility in Acetic Acid | Soluble | - |
| Solubility in Ethanol | Slightly soluble | - |
| Hygroscopicity | High | Absorbs moisture from air |
| Stability | Stable under normal conditions; sensitive to moisture and light | - |
| pH (aqueous solution) | Slightly acidic | - |
| Thermal Decomposition | Decomposes to holmium oxide (Ho₂O₃) | - |
| Parameter | Information |
|---|---|
| Chemical Stability | Stable under normal conditions |
| Conditions to Avoid | Moisture, high temperature, strong oxidizing agents |
| Incompatible Materials | Strong bases, strong oxidizing agents, reducing agents |
| Hazardous Decomposition Products | Holmium oxide (Ho₂O₃), carbon dioxide, acetic acid vapors |
| Hazardous Polymerization | Will not occur |
| Hygroscopicity | High; absorbs moisture from air |
| Photosensitivity | Moderate |
Thermal Decomposition:
2Ho(CH₃COO)₃·xH₂O → Ho₂O₃ + 3CO₂↑ + 3CH₃COCH₃↑ + xH₂O↑
Reaction with Alkali:
Ho(CH₃COO)₃ + 3NaOH → Ho(OH)₃↓ + 3CH₃COONa
Reaction with Phosphate:
Ho(CH₃COO)₃ + Na₃PO₄ → HoPO₄↓ + 3CH₃COONa
| Application | Function | Details |
|---|---|---|
| Holmium Oxide (Ho₂O₃) Production | Precursor | High-purity holmium oxide production |
| Holmium Phosphate (HoPO₄) Production | Precursor | Phosphor and laser applications |
| Mixed Rare Earth Compounds | Precursor | Specialty mixed oxides |
| Application | Function | Details |
|---|---|---|
| Laser Crystals | Laser medium | Ho³⁺ doped laser crystals for 2 µm wavelength lasers |
| Optical Fibers | Signal amplification | Holmium-doped fiber amplifiers for telecommunications |
| Solid-State Lasers | Laser material | Ho:YAG, Ho:YLF, and other holmium-doped laser crystals |
| Infrared Emitters | IR source | Holmium-based infrared emitting materials |
| Optical Glass | Optical additive | Enhances optical properties |
| Application | Function | Details |
|---|---|---|
| Magnetic Refrigeration | Magnetic material | Holmium has strong magnetic properties; used in magnetic refrigeration |
| Specialty Magnets | Magnetic component | Holmium-containing magnetic materials |
| Research Magnets | Research material | Magnetic property studies |
| Application | Function | Details |
|---|---|---|
| Advanced Ceramics | Performance enhancer | Specialty ceramic components |
| Specialty Glass | Optical additive | Infrared and optical glasses |
| Refractory Materials | Heat resistance | High-temperature applications |
| Application | Function | Details |
|---|---|---|
| Laboratory Reagent | Rare earth research | Used as a reagent in rare earth chemistry |
| Precursor Compound | Starting material | Synthesis of other holmium compounds |
| Advanced Materials Research | Research material | Development of new materials |
| Standard Preparation | Reference material | Calibration and analysis |
| Sector / Application | Suitability | Description |
|---|---|---|
| Textile | Not Suitable | No application area |
| Food | Not Suitable | Prohibited in food additives or food contact materials |
| Cosmetics | Not Suitable | Prohibited in cosmetic formulations under CLP/REACH |
| Metal / Surface Treatment | Suitable | Can be used in specialty alloys and coatings |
| Ceramics / Glass | Suitable | Used in advanced ceramics and specialty glass production |
| Laboratory / Research | Suitable | Widely used as reagent in rare earth chemistry |
| Electronics / Optics | Suitable | Critical use in laser crystals, optical fibers, and photonics |
| Construction Chemicals | Not Suitable | No application area |
| Parameter | Condition |
|---|---|
| Storage Conditions | Store in a cool, dry, well-ventilated area |
| Container Requirements | Sealed, moisture-proof containers |
| Light Protection | Protect from light |
| Moisture Protection | Store with desiccant; hygroscopic |
| Temperature | Room temperature (15-25°C) |
| Shelf Life | Approximately 2 years under proper conditions |
| Stability Note | Hygroscopic; may absorb moisture if exposed to humid air |
| Packaging Type | Quantity | Material |
|---|---|---|
| Glass Bottle | 10 g, 50 g, 100 g | Amber glass with desiccant |
| Plastic Container | 100 g, 500 g, 1 kg | HDPE container, moisture-proof |
| Fiber Drum | 5 kg, 10 kg, 25 kg | PE-lined, moisture-proof |
| Parameter | Value |
|---|---|
| Acute Oral Toxicity (LD50, Rat) | > 2,000 mg/kg (low toxicity) |
| Dermal Toxicity | Low |
| Skin Irritation | Mild irritant (H315) |
| Eye Irritation | Mild to severe irritant (H319) |
| Inhalation | Dust may cause respiratory irritation |
| Carcinogenicity | Not classified as a carcinogen |
| Mutagenicity | Not mutagenic |
| Chronic Effects | May cause liver effects at high doses |
| Environmental Hazards | Low to moderate toxicity to aquatic life |
| Hazard Class | Category | H-Statement |
|---|---|---|
| Skin Irritation | Category 2 | H315: Causes skin irritation |
| Eye Irritation | Category 2 | H319: Causes serious eye irritation |
Signal Word: WARNING
Hazard Pictograms: GHS07 (Exclamation Mark)
| Code | Statement |
|---|---|
| P261 | Avoid breathing dust |
| P264 | Wash hands thoroughly after handling |
| P271 | Use only in well-ventilated areas |
| P280 | Wear protective gloves/eye protection/face protection |
| P302+P352 | IF ON SKIN: Wash with plenty of soap and water |
| P304+P340 | IF INHALED: Remove person to fresh air and keep comfortable for breathing |
| P305+P351+P338 | IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present |
| P337+P313 | If eye irritation persists: Get medical advice/attention |
| P501 | Dispose of contents/container in accordance with local regulations |
| Route of Exposure | Action to Be Taken |
|---|---|
| Inhalation | Move to fresh air. If symptoms persist, seek medical attention |
| Skin Contact | Wash with plenty of soap and water. Remove contaminated clothing |
| Eye Contact | Rinse thoroughly with plenty of water for at least 15 minutes. Remove contact lenses. If irritation persists, seek medical attention |
| Ingestion | Rinse mouth. Drink plenty of water. If large amount is swallowed, seek medical attention |
| Region / Authority | Status |
|---|---|
| European Union (REACH) | Registration required |
| Turkey (KKDIK) | Compliance required |
| TSCA (USA) | Registered |
| Food / Cosmetics | Not approved |
Holmium(III) Acetate
Holmium Triacetate
Holmium Acetate Hydrate
Ho(CH₃COO)₃·xH₂O
| Property | Value |
|---|---|
| CAS Number | 25519-09-9 |
| HS Code | 291529 |
| Molecular Formula | Ho(CH₃COO)₃·xH₂O |
| Molecular Weight | ~292 g/mol (anhydrous) |
| Appearance | Light yellow-pink crystalline solid |
| Density | ~2.5–2.7 g/cm³ |
| Water Solubility | Soluble |
| Purity | ≥ 99% |
| Hygroscopicity | High |
| GHS Signal Word | WARNING |
Holmium acetate is highly hygroscopic. Must be stored in moisture-proof containers with desiccant.
Protect from light to prevent degradation.
Decomposes at high temperatures to holmium oxide (Ho₂O₃).
Causes skin and eye irritation. Use appropriate personal protective equipment.
Dust may cause respiratory irritation. Use in well-ventilated areas.
Primarily used in research, optics, photonics, and magnetic material applications.
Holmium has strong magnetic properties, making its compounds valuable for magnetic refrigeration and specialty magnet applications.
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
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 acetate is a specialty rare earth compound; appropriate precautions must be taken during handling.