m-Methyl Red CAS 20691-84-3

m-Methyl Red

Name	m-Methyl Red
Synonyms	3-((4-(Dimethylamino)phenyl)azo)benzoic acid
Molecular Structure
Molecular Formula	C15H15N3O2
Molecular Weight	269.30
CAS Registry Number	20691-84-3

Specification:

Uses:

1. Acid base titration indicator

Used in titration analysis for chemical experiments to accurately determine the reaction endpoint.

Color change range: pH 4.4 (red) to 6.2 (yellow).

2. Microbiology experiment (MR experiment)

Used for the "methyl red test" to identify bacterial types based on color changes (such as distinguishing Escherichia coli).

3. pH test paper/solution

As one of the ingredients, it is used to make a wide range of pH test strips or directly prepare pH detection solutions.