Methyl red
PH discoloration range:
4.5(Red)-6.2(Yellow)
Solubility in Ethanol: Pass
Loss on drying: 1.0 % max

Methyl red   

CAS No. 493-52-7

Molecular Formula: C15H15N3O2

Molecular Weight: 269.30

Max Absorption wavelength, λ1(PH4.5): 523~528 nm

Max Absorption wavelength, λ2(PH6.2): 427~437 nm

Mass absorption coefficient , λ1(PH4.5):130 L/(cm·g) min

Mass absorption coefficient , λ2(PH6.2):70 L/(cm·g) min

PH discoloration range: 4.5(Red)-6.2(Yellow)

Solubility in Ethanol: Pass

Loss on drying: 1.0 % max

Residue on ignition (sulfate): 0.2%max