Aluminium Sulphate Anhydrous Extra Pure

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SHORT DESCRIPTION

Aluminium Sulphate Anhydrous Extra Pure is a high-purity, white crystalline or powdery solid commonly used in laboratory chemistry as a source of aluminum ions for precipitation, titration, and coordination studies. Its anhydrous form provides a concentrated and stable option for applications requiring precise control over water content, such as analytical reagent preparation, pH adjustment, and synthesis of other aluminum salts. This compound is also used in paper sizing experiments, dye fixation, and water treatment research. The extra pure grade ensures very low levels of contaminants, supporting accurate and reproducible results in sensitive experimental work. It should be stored in airtight containers in a dry area to prevent moisture absorption and preserve its chemical integrity.

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Category: LABORATORY CHEMICALS Tags: AluminiumIonSource, AnalyticalReagent, AnhydrousSalt, HighPuritySulphate, HygroscopicCompound, InorganicStandard, PrecipitationAgent, WaterHardnessTest

Description

USES

Table of Contents

Primary Uses

Reagent in Analytical Chemistry
- Supplies aluminum ions for precipitation, complexation, and qualitative group analysis.
Coagulant in Water Treatment Simulation Studies
- Used in lab-scale flocculation/coagulation experiments modeling industrial water and wastewater treatment.
Synthesis of Other Aluminium Compounds
- Acts as a precursor to prepare aluminum hydroxide, alumina, and double salts like alums.
Study of Hydrolysis and pH Changes
- Demonstrates acidic salt hydrolysis and pH-lowering behavior when dissolved in water, ideal for acid-base equilibrium studies.
Educational Demonstrations in Salt Chemistry
- Common in labs illustrating double salt reactions, solubility, and ionic dissociation.

Secondary Uses

Ionic Strength Control in Solutions
- Used in buffer and solution preparation to adjust ionic strength for electrochemical or biological experiments.
Catalysis Research (Precursor Form)
- Serves as a starting material for the preparation of alumina-supported catalysts or other aluminum-based catalysts.
Simulation of Acid Mine Drainage
- Studied in environmental chemistry labs to model the mobility of metals in acidic, sulfate-rich waters.
Soil and Plant Chemistry Experiments
- Investigated for its effects on pH, nutrient availability, and aluminum toxicity in lab-based agronomic studies.
Thermal Decomposition Studies
- Studied in solid-state chemistry for breakdown into alumina and sulfur oxides under heating.

KEY PRODUCT FEATURES

KEY ATTRIBUTES

1. Basic Identification Attributes

Chemical Name: Aluminium Sulphate (Anhydrous)
CAS Number: 10043-01-3
HS Code: 28332200 (Aluminium sulphate)
Molecular Formula: Al₂(SO₄)₃
Synonyms:
- Anhydrous aluminium sulfate
- Dialuminium trisulfate
- Aluminum sulphate
- Cake alum (when hydrated)
- Al₂(SO₄)₃

2. Physical & Chemical Properties

Physical State: Solid (powder or granules)
Color & Odor: White to gray powder; odorless
Boiling Point: Decomposes before boiling
Melting Point: ~770°C (decomposes)
Density/Specific Gravity: ~2.71 g/cm³
Solubility:
- Water: Soluble (highly exothermic dissolution)
- Alcohol: Insoluble
pH Level: ~2.0–3.0 in 5% aqueous solution
Vapor Pressure: Negligible
Flash Point: Not flammable
Autoignition Temperature: Not applicable
Viscosity: Not applicable (solid)

3. Safety & Hazard Attributes

Hazard Class (GHS):
- Skin/Eye Irritation (Category 2)
- May cause respiratory irritation (dust)
NFPA Ratings:
- Health: 2
- Flammability: 0
- Reactivity: 0
Exposure Limits:
- OSHA PEL: Not established for compound
- Use nuisance dust limits (15 mg/m³ total, 5 mg/m³ respirable)
Reactivity:
- Reacts with water, releasing heat
- Reacts with bases to form aluminium hydroxide

4. Storage & Handling Attributes

Storage Conditions:
- Store in cool, dry, and well-ventilated area
- Keep container tightly sealed to prevent moisture uptake
Incompatible Materials:
- Strong bases, reducing agents, reactive metals
Container Type:
- HDPE, glass, or lined fiber containers
Shelf Life & Expiration Date:
- ~2–3 years if kept dry and sealed
Special Handling Requirements:
- Use gloves, goggles, and dust mask
- Avoid breathing dust or direct skin contact

5. Regulatory & Compliance Attributes

Regulatory Status:
- Listed under TSCA, REACH
- Common reagent in analytical and environmental laboratories
Transportation Restrictions:
- Not classified as hazardous for transport
Waste Disposal Method:
- Dilute and neutralize before disposal
- Follow local and institutional guidelines for non-hazardous inorganic waste

6. Environmental & Health Impact

Ecotoxicity:
- May cause harm to aquatic life in concentrated form
- Contributes to water acidity if released in large amounts
Persistence in Environment:
- Dissociates in water to sulfate and aluminium ions
Carcinogenicity/Mutagenicity:
- Not classified as carcinogenic or mutagenic
Biodegradability:
- Inorganic; not biodegradable but chemically manageable

SAFETY HANDLING PRECAUTIONS

SAFETY PRECAUTIONS

Personal Protective Equipment (PPE):
- Wear a lab coat, chemical-resistant gloves (e.g., nitrile), and safety goggles.
- Use a dust mask or respirator if dust formation is likely.
Handling:
- Avoid generating dust and inhaling airborne particles.
- Prevent contact with eyes, skin, and clothing.
- Use in a well-ventilated lab or under a chemical fume hood.
- Avoid contact with strong bases (may release heat and cause splattering).
Storage:
- Store in a tightly sealed, labeled container in a cool, dry, and well-ventilated area.
- Keep away from moisture and incompatible materials such as alkalis and reactive metals.
- Protect from physical damage and humidity.
Hygiene Measures:
- Wash hands thoroughly after handling.
- Avoid touching face or eyes during use.
- Do not eat, drink, or smoke in the lab.

FIRST AID MEASURES

Inhalation:
- Move to fresh air immediately.
- Rinse mouth and nose with water if dust was inhaled.
- Seek medical attention if respiratory symptoms develop.
Skin Contact:
- Wash skin thoroughly with soap and water.
- Remove contaminated clothing.
- Seek medical attention if redness, irritation, or burning occurs.
Eye Contact:
- Immediately flush eyes with water for at least 15 minutes.
- Hold eyelids open during rinsing.
- Seek immediate medical attention if irritation persists.
Ingestion:
- Rinse mouth with water.
- Do not induce vomiting.
- Give water or milk to dilute only if the person is fully conscious.
- Seek immediate medical attention, as ingestion may irritate or damage the digestive tract.

FIRE FIGHTING MEASURES

Suitable Extinguishing Media:
- Use dry chemical, water spray, carbon dioxide (CO₂), or foam suitable for surrounding materials.
Specific Hazards:
- Non-combustible, but may decompose at high temperatures, releasing sulfur oxides and aluminum oxide.
- May contribute to acidic or corrosive runoff during a fire.
Protective Equipment for Firefighters:
- Use self-contained breathing apparatus (SCBA) and full chemical protective gear.
Firefighting Instructions:
- Isolate area and control runoff.
- Cool containers with water spray to prevent rupture from heat.
- Avoid inhalation of fumes or dust during and after fire.