250198
Methyl Red
ACS reagent, crystalline
Synonym(s):
2-(4-Dimethylaminophenylazo)benzoic acid, 4-Dimethylaminoazobenzene-2′-carboxylic acid, Acid Red 2
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About This Item
Linear Formula:
(CH3)2NC6H4N=NC6H4CO2H
CAS Number:
Molecular Weight:
269.30
Colour Index Number:
13020
Beilstein:
750102
EC Number:
MDL number:
UNSPSC Code:
12171500
PubChem Substance ID:
NACRES:
NA.47
Recommended Products
grade
ACS reagent
Quality Level
form
crystalline
technique(s)
titration: suitable
visual transition interval
4.2-6.2, pink to yellow
mp
179-182 °C (lit.)
solubility
ethanol: 1 mg/mL
λmax
410 nm
application(s)
diagnostic assay manufacturing
hematology
histology
storage temp.
room temp
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Application
Methyl Red has been used as pH indicator in a glucose biosensor, which is used for salivary analysis.
Biochem/physiol Actions
Methyl Red is a maroon red crystal azo dye. Methyl Red is a pH indicator and changes color at a pH of 5.5. Methyl Red is widely used in saliva sampling method. In addition, it is also employed in carbohydrate and lactic acid detection. Methyl Red has been effectively used for intrageneric differentiation of Enterobacteriaceae.
Storage Class Code
11 - Combustible Solids
WGK
WGK 2
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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