Murexide (CAS 3051-09-0), a purple azo dye with 98%+ purity, functions as a metal chelate indicator and analytical reagent. It is utilized in EDTA complexometric titrations for calcium and magnesium determination. S.Nihar Exports supplies Murexide in 98%+ purity and ACS reagent/indicator grades.
Murexide: Properties and Identification
Murexide, also known as ammonium purpurate (CAS 3051-09-0), is a purple azo dye specified at 98%+ purity for indicator grade. This compound acts as a metal chelate indicator, forming distinctively colored complexes with various metal ions. For example, it produces a red complex with calcium, yellow with nickel or copper, and orange-red with cobalt.
Key Applications and Indicator Use
Murexide serves as a metallochromic indicator in EDTA complexometric titrations, specifically for the determination of calcium (Ca2+) and magnesium (Mg2+) hardness. It is a standard indicator in water hardness analysis, typically used at pH 10-11 in an ammonia buffer. Beyond water analysis, Murexide is applied in dental calcium research, bone mineral content studies, colorimetric determination of heavy metals in analytical chemistry, and as an enzyme assay indicator for calcium-dependent reactions in biochemistry. Its use extends to environmental water analysis for total hardness.
Sourcing Murexide from S.Nihar Exports
S.Nihar Exports, an ISO 9001:2015 certified fine and specialty chemical supplier, offers Murexide in 98%+ purity and ACS reagent/indicator grades. HPLC-grade variants are also available on request. Every shipment includes a Certificate of Analysis (COA). Headquartered at 512 Maker Bhavan 3, New Marine Lines, Mumbai 400020, India, S.Nihar Exports was founded in 1995 and is part of N. Himatlal & Co. The company