Methyl red (C.I. 13020) IND ACS

C₁₅H₁₅N₃O₂
Acid Red 2
M.W: 269,31  CAS: 493-52-7  EC: 207-776-1  TARIC: 29270000

P: P102-P202  

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• Appearance Dark red to maroon to violet or purple powder or crystals
• Transition range pH 4.4 – 6.2
• Red to yellow orange
• Absorption maximum ?_1max (pH 4.5) 523 – 526nm
• Absorption maximum ?_1max (pH 6.2) 427 – 437nm
• Loss on drying ? 5.0%

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