LANTHANUM HYDROXIDE

1. PRODUCT IDENTIFICATION AND CHEMICAL IDENTITY

Parameter	Information
Product Name	Lanthanum Hydroxide
Chemical Name	Lanthanum(III) Hydroxide
Other Names	La(OH)₃, Basic Lanthanum Salt, Hydroxide Form Rare Earth Compound
CAS Number	14507-19-8
EC Number (EINECS)	238-510-2
Chemical Formula	La(OH)₃
Molecular Weight	189.92 g/mol
Appearance	White, amorphous or crystalline powder
Odor	Odorless
Physical State (20°C)	Solid (powder)

2. CHEMICAL STRUCTURE

2.1. Molecular Structure

Lanthanum hydroxide is the hydroxide salt of lanthanum. Lanthanum ions (La³⁺) and hydroxide ions (OH⁻) are present in a 1:3 ratio. The compound typically exists as an amorphous or crystalline powder with a hexagonal structure. It is a basic compound that readily reacts with acids to form lanthanum salts.

Structural Features:

                    LANTHANUM HYDROXIDE [La(OH)₃]
                          |
                La³⁺ - OH⁻ Ionic Bonds
                          |
        +----------------+----------------+
        |                |                |
    Hexagonal         Basic              Thermal Stability
    Structure         Nature             Up to 400-500°C

2.2. Structural Properties

Parameter	Value
Crystal System	Hexagonal (UCl₃ type structure)
Molecular Weight	189.92 g/mol
Density	~4.5 g/cm³
Appearance	White, amorphous or crystalline powder
pH (suspension)	Basic (~9-11)

3. PHYSICAL AND CHEMICAL PROPERTIES

Property	Value	Description
Appearance	White, amorphous or crystalline powder	-
Odor	Odorless	-
Chemical Formula	La(OH)₃	-
Molecular Weight	189.92 g/mol	-
Density	~4.5 g/cm³	-
Decomposition Temperature	~400-500 °C (to LaOOH then La₂O₃)	-
Water Solubility (25°C)	Very slightly soluble (~0.01 g/L)	-
Solubility in Acids	Soluble	-
Solubility in Alkalis	Insoluble	-
pH (suspension)	Basic (~9-11)	-
Hygroscopicity	Low	-
Stability	Stable under normal conditions	-
Thermal Stability	Stable up to 400-500°C	-

3.1. Thermal Decomposition

Lanthanum hydroxide decomposes in stages upon heating:

La(OH)₃ → LaOOH + H₂O (at ~300-400°C)
2LaOOH → La₂O₃ + H₂O (at ~400-500°C)

4. PURITY GRADES

Parameter	Industrial Grade	High Purity Grade	Ultra High Purity Grade
Purity	≥ 99.0%	≥ 99.9%	≥ 99.99%
La(OH)₃ Content	≥ 99.0%	≥ 99.9%	≥ 99.99%
Heavy Metals (as Pb)	≤ 50 ppm	≤ 10 ppm	≤ 5 ppm
Iron (Fe)	≤ 50 ppm	≤ 10 ppm	≤ 5 ppm
Calcium (Ca)	≤ 100 ppm	≤ 20 ppm	≤ 10 ppm
Sodium (Na)	≤ 100 ppm	≤ 20 ppm	≤ 10 ppm
Chloride (Cl⁻)	≤ 0.1%	≤ 0.05%	≤ 0.02%
Nitrate (NO₃⁻)	≤ 0.1%	≤ 0.05%	≤ 0.02%
Sulfate (SO₄²⁻)	≤ 0.1%	≤ 0.05%	≤ 0.02%
Other Rare Earths	≤ 1.0%	≤ 0.1%	≤ 0.01%
Loss on Drying	≤ 1.0%	≤ 0.5%	≤ 0.3%

5. STABILITY AND REACTIVITY

Parameter	Information
Chemical Stability	Stable under normal conditions; slowly absorbs CO₂ from air to form carbonate
Conditions to Avoid	High temperature (>500°C), strong acids
Incompatible Materials	Strong acids (reacts vigorously), CO₂ (slow carbonation)
Hazardous Decomposition Products	Lanthanum oxide (La₂O₃), water (H₂O)
Hazardous Polymerization	Will not occur
Hygroscopicity	Low
Carbonation	Slowly reacts with atmospheric CO₂ to form La₂(CO₃)₃

5.1. Chemical Reactions

Reaction with Acid:

La(OH)₃ + 3HCl → LaCl₃ + 3H₂O

La(OH)₃ + 3HNO₃ → La(NO₃)₃ + 3H₂O

Thermal Decomposition:

La(OH)₃ → LaOOH + H₂O (300-400°C)
2LaOOH → La₂O₃ + H₂O (400-500°C)

Carbonation:

2La(OH)₃ + 3CO₂ → La₂(CO₃)₃ + 3H₂O

6. APPLICATION AREAS

6.1. Ceramics Production

Application	Function	Details
High Temperature Additive	Thermal stability	Improves high temperature resistance
Dielectric Properties	Electrical properties	Enhances dielectric characteristics
Electronic Ceramics	Dopant	Improves electrical properties
Refractory Materials	Performance enhancer	High temperature applications

6.2. Catalyst Systems

Application	Function	Details
Basic Catalyst	Active phase	Base-catalyzed reactions
Catalyst Support	Support material	Support for active catalytic components
Petrochemicals	Catalyst component	Hydrocarbon conversion
Environmental Catalysis	DeNOx catalysts	Emission control

6.3. Laboratory Reagent

Application	Function	Details
Analytical Reagent	Standard solution	Preparation of rare earth solutions
Synthesis Precursor	Starting material	Synthesis of other lanthanum compounds
Research	Laboratory chemical	Chemical research and development
Standard Preparation	Reference material	Calibration and analysis

6.4. Sol-Gel Processes

Application	Function	Details
Nanomaterial Synthesis	Precursor	Sol-gel synthesis of nanomaterials
Thin Film Production	Precursor	Thin film deposition via sol-gel
Nanocomposites	Additive	Advanced material synthesis
Mesoporous Materials	Template	Synthesis of mesoporous structures

6.5. Glass and Film Coatings

Application	Function	Details
Optical Additive	Optical properties	Enhances glass characteristics
Surface Modification	Surface treatment	Specialty coating applications
UV Resistant Coatings	UV protection	Absorbs ultraviolet light
Anti-reflective Coatings	Optical performance	Reduces reflection

6.6. Other Applications

Application	Function	Details
Phosphate Binder	Research	Phosphate binding studies
Water Treatment	Phosphate removal	Environmental applications
Battery Materials	Additive	Electrode performance enhancement
Phosphor Precursor	Phosphor production	Lanthanum-based phosphors

7. PRODUCTION PROCESS

7.1. Raw Materials

Lanthanum hydroxide is produced from lanthanum salts:

Raw Material	Source	Description
Lanthanum Nitrate	La(NO₃)₃·6H₂O	Most common precursor
Lanthanum Chloride	LaCl₃·7H₂O	Alternative precursor
Lanthanum Oxide	La₂O₃	Can be hydrated to hydroxide

7.2. Production Process Flow

Lanthanum Nitrate or Chloride Solution
         ↓
Precipitation with Sodium Hydroxide (NaOH) or Ammonium Hydroxide (NH₄OH)
         ↓
La(OH)₃ Precipitation
         ↓
Filtration → Washing (to remove salts)
         ↓
Drying (at moderate temperature)
         ↓
La(OH)₃ Powder
         ↓
Milling → Classification → Packaging

7.3. Process Stages

Stage	Description
1. Raw Material Preparation	Lanthanum nitrate or chloride is dissolved in water
2. Precipitation	Sodium hydroxide (NaOH) or ammonium hydroxide (NH₄OH) is added to precipitate La(OH)₃
3. Filtration	Precipitate is filtered to remove liquid
4. Washing	Filter cake is washed to remove salts (NaCl, NaNO₃)
5. Drying	Washed product is dried at moderate temperature (80-120°C)
6. Milling	Dried product is milled to desired particle size
7. Packaging	Packaged in standard containers due to low hygroscopicity

8. ALTERNATIVE MATERIALS COMPARISON

Application Area	Alternative Materials	Notes
Ceramic Additive	Lanthanum Oxide, Zirconium Hydroxide	Different thermal expansion and dielectric properties
Catalyst Support	Alumina, Magnesium Hydroxide	Preferred based on acidic/basic character
Sol-Gel Precursor	Titania Sol, Cerium Hydroxide	Different optical and mechanical behavior
Phosphate Binder	Lanthanum Carbonate, Lanthanum Chloride	Different solubility and binding properties

9. SAFETY AND TOXICOLOGY

Parameter	Value
Acute Oral Toxicity (LD50, Rat)	> 2,000 mg/kg (low toxicity)
Dermal Toxicity	Low
Skin Irritation	Mild irritant
Eye Irritation	Mild irritant
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 toxicity to aquatic life

10. GHS CLASSIFICATION

Hazard Class	Category	H-Statement
Skin Irritation	Category 2	H315: Causes skin irritation
Eye Irritation	Category 2	H319: Causes serious eye irritation
Specific Target Organ Toxicity	Category 3	H335: May cause respiratory irritation

Signal Word: WARNING

Hazard Pictograms: GHS07 (Exclamation Mark)

11. PRECAUTIONARY STATEMENTS (P-CODES)

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

12. FIRST AID MEASURES

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

13. STORAGE AND SHELF LIFE

Parameter	Condition
Storage Conditions	Store in a cool, dry, well-ventilated area
Container Requirements	Moisture-proof, tightly sealed containers
Temperature	Room temperature (15-25°C)
Shelf Life	24 months under proper conditions
Stability Note	Slowly reacts with CO₂ from air; store in sealed containers

14. PACKAGING OPTIONS

Packaging Type	Quantity	Material
PE Bag	1 kg, 5 kg, 10 kg	Polyethylene, moisture-proof
Glass Bottle	100 g, 500 g	Amber glass
Fiber Drum	25 kg, 50 kg	PE-lined, moisture-proof
Plastic Drum	25 kg, 50 kg	HDPE drum, moisture-proof

15. TRANSPORT INFORMATION

Parameter	Information
UN Number	Not applicable (not dangerous goods)
Hazard Class	Not applicable
Packing Group	Not applicable
ADR/RID	Not regulated
IMDG	Not regulated
IATA	Not regulated

16. REGULATORY STATUS

Region / Authority	Status
European Union (REACH)	Registered
Turkey (KKDIK)	Compliance required
TSCA (USA)	Registered
EINECS	238-510-2
HS Code	2846.90

17. OTHER NAMES AND SYNONYMS

Lanthanum(III) Hydroxide
Lanthanum Hydroxide
La(OH)₃
Basic Lanthanum Salt
Hydroxide Form Rare Earth Compound

18. QUICK REFERENCE TABLE

Property	Value
CAS Number	14507-19-8
EC Number	238-510-2
Chemical Formula	La(OH)₃
Molecular Weight	189.92 g/mol
Appearance	White, amorphous or crystalline powder
Density	~4.5 g/cm³
Water Solubility	Very slightly soluble (~0.01 g/L)
pH (suspension)	~9-11 (basic)
Purity	≥ 99.9% (high purity grade)
Hygroscopicity	Low
Thermal Stability	Stable up to 400-500°C
HS Code	2846.90
GHS Signal Word	WARNING
UN Number	Not applicable

19. CRITICAL NOTICES AND BEST PRACTICES

CRITICAL NOTICES:

Basic Nature: Lanthanum hydroxide is a basic compound. Reacts with acids to form lanthanum salts. Should be stored away from acids.
Carbonation Sensitivity: Slowly reacts with atmospheric CO₂ to form lanthanum carbonate. Should be stored in sealed containers.
Thermal Decomposition: Decomposes to LaOOH and then La₂O₃ upon heating. Thermal treatment can be used for oxide production.
Low Solubility: Practically insoluble in water, making it suitable for applications requiring low solubility.
Skin and Eye Irritation: Causes skin and eye irritation. Use appropriate personal protective equipment.
Inhalation Hazard: Dust may cause respiratory irritation. Use in well-ventilated areas.

BEST PRACTICE RECOMMENDATIONS:

Storage:

Store in a cool, dry, well-ventilated area
Use sealed, moisture-proof containers
Keep away from acids
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
Reseal container after use

Waste Management:

Dispose in accordance with local regulations
Do not discharge into water bodies
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. Lanthanum hydroxide is a basic material; appropriate precautions must be taken during handling.

Lanthanum Hydroxide, 14507-19-8