861235

Methyl Red hydrochloride

ACS reagent

• Synonym(s): 4-Dimethylaminoazobenzene-2′-carboxylic acid hydrochloride, Acid Red 2
• Linear Formula: (CH₃)₂NC₆H₄N=NC₆H₄CO₂H·HCl
• CAS Number: 63451-28-5
• Molecular Weight: 305.76
• Colour Index Number: 13020
• EC Number: 264-190-9
• MDL number: MFCD00012614
• UNSPSC Code: 12171500
• PubChem Substance ID: 24888532
• NACRES: NA.47

Properties

• grade: ACS reagent
• Quality Level: 200
• form: powder or crystals
• visual transition interval: 4.2-6.2, pink to yellow
• mp: 175 °C (dec.) (lit.)
• solubility: ethanol: 0.1%
• λmax: 493 nm
• application(s): diagnostic assay manufacturing; hematology; histology
• storage temp.: room temp
• SMILES string: Cl.CN(C)c1ccc(cc1)\N=N\c2ccccc2C(O)=O
• InChI: 1S/C15H15N3O2.ClH/c1-18(2)12-9-7-11(8-10-12)16-17-14-6-4-3-5-13(14)15(19)20;/h3-10H,1-2H3,(H,19,20);1H/b17-16+;
• InChI key: ICTWKXAVJAHRMK-CMBBICFISA-N

Description

General description

Methyl red (C.I. 13020) is also known as acid red 2. The hydrochloride form is slightly soluble in water and ethanol.

Application

Methyl red is widely used in food science and applied & pure biology. It is added in media while preparing agar plates for microbiology. It is used as a vital stain for protozoa. Methyl red is also utilized as a tracer for assessing penetration of foods into packaging and as a component of an indicator to examine pork quality. It has been used to study the ability of earthworms to modify their environmental pH.

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves