Methyl Orange CAS 547-58-0

Methyl Orange

Name	Methyl Orange
Synonyms	C.I. 13025; Acid Orange 52; Methyl orange sodium salt
Molecular Structure
Molecular Formula	C14H14N3NaO3S
Molecular Weight	327.33
CAS Registry Number	547-58-0
EC Number	208-925-3

Specification:

Uses:

1. Acid base titration

In chemical analysis, it is used for titration of strong acid strong base or strong acid weak base to accurately determine the reaction endpoint.

Color change range: pH ≤ 3.1 (red)~pH ≥ 4.4 (yellow).

2. Roughly test the pH value

As a key component of pH test strips, it is used to quickly and roughly determine whether a solution is acidic or alkaline.

3. Safety warning agent

Due to its red color in acid, it is sometimes added in small amounts to certain industrial products or acidic substances as a visual warning.