Methyl red         CAS No.493-52-7

synonyms: p - Dimethylaminoazobenzene - carboxylic acid

Molecular formula: C15H15O2N3

Molecular weight: 269.30

Property : shiny , purple crystal. dissolved in ethanol and acetic acid, undissolved in water.

Use: acid-base indicator.. Adsorption indicator.

Storage require: sealed .

Range of melting point : 172.0 - 182.0 (2C spacing)

Range of PH: 4.2 (red)-6.2 (yellow)

Solubility test in ethanol: passed

Residue on ignition (sulfate): 0.2% Max.

Oxidated test (bromine): passed