Methyl Red 493-52-7

CAS No.: 493-52-7
Type.: Chemical
Appearance: Dark red crystalline powder
Molecular Formula： C15H15N3O2
Shelf Life： -
Min Order Quantity: As requirements

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Specification

Items	Standard
Max absorption wavelength， λ1 (PH4.5), nm, λ2 (PH6.2), nm	523~528 427~437
Mass absorption coefficient, λ1 (PH4.5), L/(cm·g), λ2 (PH6.2), L/(cm·g)	≥130 ≥70
Ethanol dissolution test	Pass
Residue on ignition (SO₄^2-)	≤0.2
Ph	4.5（Red）~6.2（Yellow）
Loss on drying	≤1.0

Application
(1) Methyl Red is used as indicator in 0.1% alcoholic solution; pH: 4.4 red, 6.2 yellow.

(2) Methyl Red also used for titrating NH3, weak organic bases, e.g, alkaloids;