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Neodymium Acetate, Neodymium Acetate Hydrate, 6192-13-8

Neodymium Acetate, Neodymium Acetate Hydrate, 6192-13-8

NEODYMIUM ACETATE HYDRATE
1. PRODUCT IDENTIFICATION AND CHEMICAL IDENTITY

Parameter Information
Product Name Neodymium Acetate Hydrate
Chemical Name Neodymium(III) Acetate Hydrate
Other Names Neodymium Acetate Salt, NdFeB Precursor, Glass Additive Acetate, Light Pink Crystalline Powder
CAS Number 6192-13-8
EC Number (EINECS) 228-250-8
Chemical Formula Nd(CH₃COO)₃·xH₂O (x = 1 to 4)
Molecular Weight ~375.4 g/mol (depending on the degree of hydration)
Appearance Light pink crystalline powder
Odor Slight acetic acid odor
Physical State (20°C) Solid (crystalline powder)

2. CHEMICAL STRUCTURE
2.1. Molecular Structure
Neodymium acetate hydrate is the acetate salt of the rare earth element neodymium. It consists of neodymium ions (Nd³⁺) and acetate ions (CH₃COO⁻) in a 1:3 ratio. The molecule contains a variable number of water molecules of hydration (typically 1-4 moles of H₂O). It is readily soluble in water and alcohol. Due to its hygroscopic nature, it is sensitive to degradation in humid environments.

Structural Features:

           NEODYMIUM ACETATE HYDRATE [Nd(CH₃COO)₃·xH₂O]
                          |
                Nd³⁺ - CH₃COO⁻ Ionic Bonds
                          |
        +----------------+----------------+
        |                |                |
    Monoclinic        Soluble in       Highly
    Crystal         Water and        Hygroscopic
    Structure        Alcohol

2.2. Structural Properties

Parameter Value
Crystal System Monoclinic
Molecular Weight ~375.4 g/mol (depending on hydration)
Density ~2.8 g/cm³
Appearance Light pink crystalline powder
Melting Point ~80 °C (with water loss in hydrated form)
pH (1M solution) Slightly acidic (~5.0-6.0)

3. PHYSICAL AND CHEMICAL PROPERTIES

Property Value Description
Appearance Light pink crystalline powder Color intensity depends on purity
Odor Slight acetic acid odor -
Chemical Formula Nd(CH₃COO)₃·xH₂O -
Molecular Weight ~375.4 g/mol Depends on the degree of hydration
Density ~2.8 g/cm³ -
Melting Point ~80 °C With water loss in hydrated form
Solubility in Water (25°C) Readily soluble -
Solubility in Alcohol Soluble -
Solubility in Acids Soluble -
pH (1M solution) Slightly acidic (~5.0-6.0) -
Stability Hygroscopic; degrades in humid environments Must be stored under dry conditions
Hygroscopicity High Rapidly absorbs moisture

4. PURITY GRADES

Parameter Technical Grade High Purity Grade Analytical Grade Ultra-High Purity Grade
Purity ≥ 99.0% ≥ 99.5% ≥ 99.9% ≥ 99.99%
Nd(CH₃COO)₃ Content ≥ 99.0% ≥ 99.5% ≥ 99.9% ≥ 99.99%
Other Rare Earths ≤ 1.0% ≤ 0.5% ≤ 0.1% ≤ 0.01%
Heavy Metals (Pb) ≤ 50 ppm ≤ 20 ppm ≤ 10 ppm ≤ 5 ppm
Iron (Fe) ≤ 100 ppm ≤ 50 ppm ≤ 20 ppm ≤ 10 ppm
Calcium (Ca) ≤ 100 ppm ≤ 50 ppm ≤ 20 ppm ≤ 10 ppm
Sodium (Na) ≤ 1000 ppm ≤ 500 ppm ≤ 100 ppm ≤ 50 ppm
Chloride (Cl⁻) ≤ 0.1% ≤ 0.05% ≤ 0.02% ≤ 0.01%
Sulfate (SO₄²⁻) ≤ 0.2% ≤ 0.1% ≤ 0.05% ≤ 0.02%
Loss on Drying (H₂O) Variable Variable Variable Variable
Particle Size (D50) 10-50 µm 5-20 µm 1-10 µm < 5 µm

5. STABILITY AND REACTIVITY

Parameter Information
Chemical Stability Hygroscopic; stable under dry, closed conditions.
Conditions to Avoid High humidity, exposure to open atmosphere, prolonged air contact, high temperatures (>80°C).
Incompatible Materials Strong oxidizing agents, strong acids, strong bases, alkali metals.
Hazardous Decomposition Products At high temperatures: acetic acid vapors and neodymium oxide (Nd₂O₃).
Hazardous Polymerization Will not occur.
Hygroscopicity High; when exposed to air, it absorbs moisture and may become sticky.

5.1. Chemical Reactions

  • Thermal Decomposition (Hydrated Form):
    Nd(CH₃COO)₃·xH₂O → Nd(CH₃COO)₃ + xH₂O (~80°C)
    Nd(CH₃COO)₃ → Nd₂O₃ + CO₂ + CO + CH₃COCH₃ (at high temperature)

  • Behavior in Aqueous Solution:
    Nd(CH₃COO)₃(aq) → Nd³⁺(aq) + 3CH₃COO⁻(aq)

  • Precipitation with Alkali:
    Nd(CH₃COO)₃ + 3NaOH → Nd(OH)₃↓ + 3CH₃COONa

6. APPLICATION AREAS
6.1. NdFeB Magnet Production

Application Function Details
NdFeB Magnet Production Soluble Nd source Used as a precursor in the production of Nd metal.
Magnet Alloying Nd source Converted to Nd metal via metallothermic reduction.

6.2. Laser Crystals and Optoelectronics

Application Function Details
Nd:YAG and Nd:YLF Laser Crystals Dopant Critical component in solid-state laser systems.
Optical Amplifiers Signal amplification Used in fiber optic communication systems.
Optical Glass Production Color and UV control Regulates color and UV transmittance of special optical glasses.

6.3. Glass and Ceramic Industry

Application Function Details
Glass Coloring Colorant Imparts purplish tones to glass.
UV Filtering UV absorber Controls UV transmittance of glass.
Ceramic Glazes Color and gloss Provides purplish tones and gloss to ceramic glazes.

6.4. Organic Synthesis and Catalysis

Application Function Details
Lewis Acid Catalyst Catalytic activity Acts as a Lewis acid in organic synthesis reactions.
Polymerization Catalyst Polymerization initiator Used as a catalyst in certain polymerization reactions.

6.5. Pigment and Paint Industry

Application Function Details
Pigment Production Colorant additive Used in pigment production for purplish tones.
Paint Additive Colorant Used as a color tone adjuster in specialty paints.

6.6. Laboratory and Research

Application Function Details
Analytical Reagent Spectroscopic analysis Used as a reference in spectroscopic analyses.
Synthesis Precursor Starting material Synthesis of other neodymium compounds.
Standard Preparation Reference material Used as a reference for calibration and analysis.

7. PRODUCTION PROCESS
7.1. Raw Material Sources
Neodymium acetate is produced from neodymium-containing compounds:

Source Type Neodymium Form Major Regions
Neodymium Oxide (Nd₂O₃) High-purity oxide China, India, USA
Neodymium Carbonate Precipitated salt China, Brazil
Neodymium Chloride Soluble salt China, India

7.2. Production Process Flow

Neodymium Oxide (Nd₂O₃) or Neodymium Carbonate
         ↓
Dissolution in Acetic Acid (CH₃COOH)
         ↓
Reaction: Nd₂O₃ + 6CH₃COOH → 2Nd(CH₃COO)₃ + 3H₂O
         ↓
Filtration (Removal of Impurities)
         ↓
Evaporation and Concentration
         ↓
Crystallization (Hydrated Form)
         ↓
Drying (Under Controlled Conditions)
         ↓
Neodymium Acetate Hydrate Powder
         ↓
Packaging (Moisture-Proof)

7.3. Process Stages

Stage Description
1. Raw Material Preparation Nd₂O₃ or Nd₂(CO₃)₃ is obtained in high purity.
2. Acid Dissolution The raw material is dissolved in concentrated acetic acid (CH₃COOH).
3. Reaction The reaction Nd₂O₃ + 6CH₃COOH → 2Nd(CH₃COO)₃ + 3H₂O takes place.
4. Filtration Insoluble impurities in the solution are removed by filtration.
5. Concentration The solution is concentrated by evaporation.
6. Crystallization Neodymium acetate hydrate is crystallized from the concentrated solution.
7. Drying The crystals are dried under controlled conditions at appropriate temperature.
8. Packaging Due to its hygroscopic nature, it is packaged in moisture-proof containers.

8. SECTORAL SUITABILITY TABLE

Sector Suitability Explanation
Electronics Suitable Used in magnets, lasers, and optoelectronic systems.
Glass and Ceramics Suitable Used as a color and UV control additive.
Organic Chemistry Suitable Used as a Lewis acid catalyst.
Pigment and Paint Suitable Used as a purplish tone additive.
Cosmetics Not Suitable Direct use is not appropriate.
Food and Pharmaceutical Not Suitable Prohibited due to acetate structure and metal content.
Nuclear Limited Limited use in specialized applications.

9. COMPARISON WITH ALTERNATIVE MATERIALS

Application Area Alternative Materials Remarks
Soluble Nd Source Neodymium Nitrate (Nd(NO₃)₃) Different anion structure; acetate is preferred in some applications.
Glass and Pigment Additive Neodymium Sulfate (Nd₂(SO₄)₃) Similar optical properties; different solubility.
Organic Synthesis Praseodymium Acetate (Pr(CH₃COO)₃) Similar catalytic applications; different reactivity.
Coating Systems Zirconium Acetate (Zr(CH₃COO)₄) Lower cost alternative.

10. SAFETY AND TOXICOLOGY

Parameter Value
Acute Oral Toxicity (LD50, Rat) > 2,000 mg/kg (low toxicity)
Dermal Toxicity Low
Skin Irritation Mild to moderate irritant
Eye Irritation Serious irritant
Inhalation Dust inhalation may cause respiratory tract irritation.
Carcinogenicity Not classified as carcinogenic.
Mutagenicity Not mutagenic.
Chronic Effects Rare earth compounds have low bioavailability; however, high doses may cause liver effects.
Environmental Hazards Moderate aquatic toxicity; caution required due to acetate ion content.

11. GHS CLASSIFICATION

Hazard Class Category H-Statement
Skin Irritation Category 2 H315: Causes skin irritation.
Eye Irritation Category 2A H319: Causes serious eye irritation.
Specific Target Organ Toxicity Category 3 H335: May cause respiratory irritation.
Hazardous to the Aquatic Environment Category 3 H402: Harmful to aquatic life.

Signal Word: WARNING

Hazard Pictograms: GHS07 (Exclamation Mark)

UN Number: 3077 (Environmentally hazardous substance)

12. PRECAUTIONARY STATEMENTS (P-CODES)

Code Statement
P261 Avoid breathing dust.
P264 Wash 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 and easy to do.
P337+P313 If eye irritation persists: Get medical advice/attention.
P501 Dispose of contents/container in accordance with local regulations.

13. FIRST AID MEASURES

Exposure Route Action to Take
Inhalation Remove to fresh air. If symptoms persist, seek medical attention.
Skin Contact Wash with plenty of soap and water. Remove contaminated clothing. If irritation persists, seek medical attention.
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.

14. STORAGE AND SHELF LIFE

Parameter Condition
Storage Conditions Store in a cool, dry, and well-ventilated area. Ensure a moisture-free environment.
Container Requirements Moisture-proof, tightly closed containers. Vacuum-sealed or inert gas (N₂, Ar) packaging is recommended.
Temperature Room temperature (15-25°C).
Shelf Life 12-18 months under appropriate conditions (due to hygroscopic nature).
Stability Note Highly hygroscopic; rapidly degrades in humid environments and may become sticky. If left open, Nd(OH)₃ may form.

15. PACKAGING OPTIONS

Packaging Type Quantity Material
Aluminum Foil Bag 1 kg, 5 kg, 10 kg Double-layered, vacuum-sealed, moisture-proof, inert gas filled.
Fiber Drum 25 kg, 50 kg PE-lined, moisture-proof, vacuum-sealed.
Plastic Barrel 25 kg, 50 kg HDPE barrel, moisture-proof, vacuum-sealed or under inert gas.
Glass Bottle 100 g, 500 g, 1 kg Amber glass bottle, sealed under inert gas.

16. TRANSPORT INFORMATION

Parameter Information
UN Number 3077 (Environmentally hazardous substance)
Hazard Class 9 (Miscellaneous dangerous substances)
Packing Group III
ADR/RID Regulated.
IMDG Regulated.
IATA Regulated.
HS Code 2846.90.00.00.19 (Other rare earth compounds)

17. REGULATORY STATUS

Region / Authority Status
European Union (REACH) Registered.
Turkey (KKDIK) Compliance required.
TSCA (USA) Registered.
EINECS 228-250-8.
China (REACH equivalent) Registered; major production and export country.

18. OTHER NAMES AND SYNONYMS

  • Neodymium Acetate Salt

  • Light Pink Crystalline Powder

  • NdFeB Precursor

  • Glass Additive Acetate

  • Neodymium(III) Acetate

  • Neodim Acetate

19. QUICK REFERENCE TABLE

Property Value
CAS Number 6192-13-8
EC Number 228-250-8
Chemical Formula Nd(CH₃COO)₃·xH₂O
Molecular Weight ~375.4 g/mol (depends on hydration)
Appearance Light pink crystalline powder
Density ~2.8 g/cm³
Melting Point ~80 °C (hydrated form)
Solubility in Water Readily soluble
UN Number 3077
HS Code 2846.90.00.00.19
GHS Signal Word WARNING

20. CRITICAL WARNINGS AND BEST PRACTICES

CRITICAL WARNINGS:

  • Highly Hygroscopic Nature: Neodymium acetate hydrate has a high moisture absorption capacity. When exposed to air, it rapidly absorbs moisture, becomes sticky, and loses its quality. Extreme care must be taken to avoid moisture during storage and handling.

  • Thermal Decomposition: Above ~80°C, water loss begins; at higher temperatures, acetic acid vapors are released. Ventilation is essential.

  • Incompatibility: Contact with strong oxidizing agents creates a fire and explosion risk.

  • Eye and Skin Irritation: Due to its acidic nature, it causes irritation to skin and eyes. Protective equipment is mandatory during use.

  • Environmental Impact: Acetate content means release into water sources must be prevented.

BEST PRACTICE RECOMMENDATIONS:

  • Storage:

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

    • Use moisture-proof, vacuum-sealed, or inert gas (N₂ or Ar) filled containers.

    • Keep away from oxidizing agents.

    • Store at room temperature (15-25°C).

  • Handling:

    • Immediately close containers tightly when not in use.

    • Ensure a dry working environment during use (humidity control).

    • Use a dust mask (N95 or better), protective goggles, and chemically resistant gloves.

    • Avoid dust formation and inhalation.

    • Wash hands thoroughly after handling.

    • When preparing solutions, add slowly due to acidic character.

  • Waste Management:

    • Dispose of in accordance with local regulations.

    • Do not discharge into water sources or sewers.

    • For large quantities, rare earth recovery should be considered (valuable metal).

LEGAL DISCLAIMER
This Technical Data Sheet (TDS) is for informational purposes only and has been prepared based on available technical data. The user is solely responsible for determining the suitability of the product for their specific applications and for complying with all local, national, and international regulations. For complete safety, storage, handling, transport, disposal, 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. Neodymium acetate hydrate requires careful handling and storage due to its highly hygroscopic nature; it is classified as an environmentally hazardous substance (UN 3077).

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