Mono-Ammonium Purpurate (MAPu), also known as Murexide, is a reddish-purple crystalline compound with the chemical formula C₈H₅N₅O₆·NH₄. It is primarily known for its application as a complexometric indicator in analytical chemistry, particularly for the determination of calcium, copper, and nickel. The compound is sensitive to changes in pH and metal ion concentration, resulting in a noticeable color change, making it a valuable tool in titration methods.
Applications:
- Analytical Chemistry:
- Complexometric Indicator: Widely used in titration procedures to determine the concentration of metal ions such as calcium, copper, and nickel. MAPu changes color when it binds to these ions, indicating the endpoint of the titration.
- Colorimetric Analysis: Utilized in colorimetric assays to measure the concentration of specific ions in solution.
- Research and Laboratory Use:
- Commonly employed in laboratory settings for experiments involving metal ion detection and quantification.
- Used in the study of metal-ligand interactions due to its ability to form colored complexes with metal ions.
Handling and Storage:
- Handling:
- Avoid contact with skin, eyes, and clothing.
- Use appropriate personal protective equipment (PPE) such as gloves, goggles, and protective clothing.
- Handle with care in a well-ventilated area to avoid inhalation of dust.
- Prevent the formation of dust and avoid inhalation, as fine particles may cause respiratory irritation.
- Storage:
- Store in a cool, dry, and well-ventilated area away from light and incompatible materials.
- Keep the container tightly closed to prevent moisture absorption and contamination.
- Store separately from strong acids, bases, and oxidizing agents.
- Ensure proper labeling and store in original packaging to maintain product integrity.
Safety Considerations:
- Hazard Statements: Mono-Ammonium Purpurate can cause irritation to the eyes, skin, and respiratory system. Prolonged exposure may lead to more serious health effects.
- First Aid Measures: In case of contact with skin or eyes, rinse immediately with plenty of water. If inhaled, move to fresh air and seek medical attention if symptoms persist.
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