Aluminon (Aurin Tricarboxylic Acid Triammonium Salt) | CAS No. 569-58-4

Aluminon (Aurin Tricarboxylic Acid Triammonium Salt) / CAS NO. 569-58-4
Aluminon, also known as aurin tricarboxylic acid triammonium salt, is an organic compound widely used as a reagent in analytical chemistry for detecting and measuring aluminum ions. It is a reddish dye that forms a red-colored complex with aluminum, making it particularly valuable for spectrophotometric analysis. The compound has a unique structure that contributes to its reactivity and specificity for aluminum detection. The CAS number 569-58-4 uniquely identifies this compound.

Physical and Chemical Properties
Chemical Formula: C₂₂H₂₃N₃O₉
Molecular Weight: 473.44 g/mol
Appearance: Red to reddish-brown crystalline powder
Solubility:
Soluble in water
Slightly soluble in ethanol
pH: Forms acidic solutions in water
Melting Point: Decomposes at high temperatures before melting
Stability: Stable under standard conditions but sensitive to light and moisture.
Applications of Aluminon
1. Analytical Chemistry
Aluminon is most commonly used in qualitative and quantitative analysis of aluminum ions (Al³⁺). Its applications include:

Spectrophotometric Analysis: Forms a red complex with aluminum ions, which can be measured at a specific wavelength using a spectrophotometer. This method is used in:
Water quality testing
Soil and plant analysis
Colorimetric Reagent: It provides a simple and effective way to detect trace amounts of aluminum in various matrices.
2. Environmental Monitoring
Aluminon is used in environmental studies to measure aluminum levels in water sources, including:

Drinking water
Industrial wastewater
Natural water bodies
3. Material Science
Coatings and Dyes: Aluminon has been explored as a dye for coloring and coating applications due to its intense red color and reactivity with metal ions.
Surface Treatments: Used for detecting aluminum in metal treatments or cleaning processes.
4. Research and Educational Applications
Laboratory Reagent: It is commonly used in research and educational laboratories for demonstrating metal ion detection and spectrophotometry techniques.
Complex Formation Studies: Aluminon helps study the behavior of metal complexes in solution, providing insights into coordination chemistry.
5. Botanical Studies
Aluminon is used to detect aluminum in plant tissues, particularly in studies focusing on aluminum toxicity and its impact on plant growth.
Toxicity and Hazards of Aluminon
Health Hazards
Although aluminon is generally considered low-to-moderate in toxicity, exposure to it can pose potential health risks:

Inhalation:
Dust may irritate the respiratory tract, causing coughing or shortness of breath.
Skin Contact:
May cause irritation or allergic reactions in sensitive individuals.
Eye Contact:
Can irritate the eyes, leading to redness, watering, or discomfort.
Ingestion:
May cause gastrointestinal discomfort, including nausea or vomiting.
Environmental Hazards
Aluminon is not highly toxic to the environment but can contribute to water pollution if disposed of improperly. The compound may affect aquatic ecosystems by altering water chemistry or forming complexes with metal ions.

Safety Measures for Handling Aluminon
1. Personal Protective Equipment (PPE)
Gloves: To prevent skin contact.
Safety Goggles: To protect eyes from dust or accidental splashes.
Lab Coat: To minimize exposure to clothing and skin.
Respiratory Protection: Use a dust mask or respirator in poorly ventilated areas.
2. Engineering Controls
Use aluminon in a well-ventilated area or under a fume hood to minimize inhalation risks.
Avoid generating dust by handling the compound carefully.
3. Storage Guidelines
Store aluminon in a tightly sealed container, in a cool, dry place away from light and moisture.
Keep it away from strong oxidizing agents or acidic substances, as these may cause unwanted reactions.
4. Safe Handling Procedures
Avoid direct contact with the compound.
Wash hands thoroughly after handling.
Prevent spills and immediately clean up any accidental releases to avoid inhalation or contact.
5. First Aid Measures
Inhalation: Move the affected individual to fresh air. Seek medical attention if symptoms persist.
Skin Contact: Wash thoroughly with soap and water. Remove contaminated clothing.
Eye Contact: Flush eyes with water for at least 15 minutes. Seek medical attention if irritation continues.
Ingestion: Rinse mouth with water. Do not induce vomiting and seek medical advice immediately.
Disposal Guidelines
Aluminon must be disposed of in compliance with local and national regulations.

Avoid releasing the compound into the environment or water systems.
Use a licensed chemical waste disposal service for proper disposal.
Conclusion
Aluminon (CAS NO. 569-58-4) is a versatile reagent widely used in analytical chemistry, environmental monitoring, and research. Its ability to form a red-colored complex with aluminum ions makes it an indispensable tool for detecting and measuring aluminum in various matrices. Despite its utility, aluminon requires careful handling due to its potential health and environmental hazards. By adhering to recommended safety measures and disposal practices, aluminon can be utilized effectively while minimizing risks to users and the environment.