Product Overview & Quality

Product Name: Murexide (Ammonium purpurate)
Brand: Kemaus (Product Code: KA-055)
Grade: Analytical Reagent (AR Grade). Manufactured and rigorously indicator-tested under strict Kemaus laboratory quality control protocols. It ensures exceptionally low trace organic impurities and moisture residue, providing maximum color sensitivity, sharp endpoints, and definitive coordination accuracy for complexometric titrations.
Physical Properties: Odorless, dark reddish-purple, purplish-brown, or dark maroon fine powder. Yields an intense, clear purple coloration upon aqueous dissolution under basic profiles.
Solubility & Chromogenic Nature: Slightly soluble in water; practically insoluble in alcohol and ether. Key Feature: In a strongly alkaline medium (around pH 12), the free indicator appears purple, but shifts immediately to a distinct orange-red color when complexed with calcium ions.
Key Use: Heavily utilized as a premier metallochromic indicator for the quantitative determination of calcium ions via EDTA complexometric titration in water quality, pharmaceutical, and food analysis laboratories. Commonly applied as a selective indicator for titrating other transition metal cations including copper, nickel, cobalt, and zinc under specific buffered baselines. Also functions as a specialized chromogenic reagent in spectrophotometric research assays.

Safety & Hazards

Classification: Not classified as a hazardous substance according to GHS regulations. It features an excellent, highly stable, and non-toxic chemical profile. Acts as a mild physical dust and cosmetic staining irritant.
Health Risks: Direct eye contact with fine dust particles triggers temporary mechanical irritation, watering, and short-term redness. Contact with intact skin will result in temporary, non-toxic deep purple staining that requires thorough washing to remove. Inhalation of airborne particles may induce coughing or sneezing.
First Aid Measures: Flush eyes immediately with plenty of flowing water for at least 15 minutes. Wash affected skin thoroughly with soap and water multiple times. Seek medical advice if irritation develops or persists.

Handling & Storage

Storage: Light and Moisture Sensitive. Extended exposure to atmospheric humidity or direct light will degrade the molecular structure and compromise endpoint color sharpness. Must be stored in its original, tightly sealed Kemaus amber glass container. Keep in a cool, strictly dry, and dark dedicated chemical storage space at stable room temperature (below 30 degrees Celsius).
Precautions: Wear standard personal protective equipment (PPE), including laboratory chemical gloves, safety glasses, and a particulate dust mask. Handle carefully to prevent the highly concentrated dye powder from staining garments or laboratory surfaces.