Methyl red sodium salt

M 2229

4-Dimethylaminoazobenzene-2'-carboxylic acid sodium salt, Acid Red 2





Bottle / Drum


Methyl Red sodium salt is the sodium salt of Methyl Red. Methyl red is an indicator dye that turns red in acidic solutions. It is a pH indicator, turning red under pH 4.4, yellow over pH 6.2, and orange in between those values. It is used in microbiology in the Voges-Proskauer test to identify bacteria that produce stable acids through mixed acid fermentation of glucose. Methyl-red positive bacteria include Proteus vulgaris and Escherichia coli. Methyl-red negative bacteria include Enterobacter aerogenes and Serratia marcescens.

M 2229 (OTTO) Methyl red sodium salt Cas 845-10-3 - used for pH detection.

PackingsPrice (INR)
25 gm 315.00
1 kg 9432.00
5 x 1 kg POR


Hematology & histology

> 90%

Almost clear solution

pH 4.5-6.2 Violet red - Brownish yellow


> 580

< 5 %

Safety Information

Personal Protective Equipment Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter
WGK Germany 3

PackingsPrice (INR)
25 gm 315.00
1 kg 9432.00
5 x 1 kg POR