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Merck
CN

861235

Methyl Red hydrochloride

ACS reagent

Synonym(s):

4-Dimethylaminoazobenzene-2′-carboxylic acid hydrochloride, Acid Red 2

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About This Item

Linear Formula:
(CH3)2NC6H4N=NC6H4CO2H·HCl
CAS Number:
63451-28-5
Molecular Weight:
305.76
UNSPSC Code:
12171500
NACRES:
NA.47
PubChem Substance ID:
24888532
EC Number:
264-190-9
Colour Index Number:
13020
MDL number:
MFCD00012614

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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

SMILES string

Cl.CN(C)c1ccc(cc1)\N=N\c2ccccc2C(O)=O

grade

ACS reagent

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

Quality Level

200

Related Categories

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.

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

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Certificates of Analysis (COA)

Lot/Batch Number
SHBS5806
SHBR2526
SHBQ7606
MKCJ4073
MKBZ2648V

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