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Factory Supply High Purity Indicator Methyl Red with Enough Stock CAS 493-52-71
Chemical Reagent493-52-7Ci No 13020
Shenyang Sinochem Biotech Co., Ltd.
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Product Description We are Manufacturer and always supplying Methyl red 493-52-7 with competitive price,high quality and regular basis.Name of Product: Methyl redMolecular Formula: C15H15O2N3Relative Molecular Mass: 269.30(1995)Appearance: Red-brown powder.CAS NO.:493-52-7Package: 25KGS plastic drumsTest results:Items:Requirements:Test results: Maximalabsorption wavelengthλ1(pH4.5),nmλ1(pH6.2),nm523~528427~437N/AN/AQuality absorption coefficientλ1(pH4.5),L/(cm·g) ≥λ2(pH1.2),L/(cm·g) ≥130704567Unqualified pH range of change4.5(red)~6.2(yellow)4.5(red)~6.2(yellow)QualifiedSolubility in alcoholQualifiedfew impurities in the solutionUnqualifiedSulfated ash % ≤0.2%3.46% UnqualifiedLoss on drying % ≤1.0%1.69%UnqualifiedMethyl red (2-(N,N-dimethyl-4-aminophenyl) azobenzenecarboxylic acid), also called C.I. Acid Red 2, is an indicator dye that turns red in acidic solutions. It is an azo dye, and is a dark red crystalline powder. Methyl red is a pH indicator; it is red in pH under 4.4, yellow in pH over 6.2, and orange in between, with a pKa of 5.1.Murexide and methyl red are investigated as promising enhancers of sonochemical destruction of chlorinated hydrocarbon pollutants. Methyl red is classed by the IARC in group 3 - unclassified as to carcinogenic potential in humans.Color transition of methyl red solution under different acid-base conditions. Left: acidic, middle: about pH 5.1 (the pKa), right: alkaline
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