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Thermo Scientific Chemicals
Methyl Red, ACS
CAS: 493-52-7 | C15H15N3O2 | 269.304 g/mol
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Catalog number 036682.14
also known as 036682-14
Price (USD)
35.65
Special offer
Online exclusive
Ends: 30-Jun-2026
42.30Save 6.65 (16%)
Each
Quantity:
25 g
Price (USD)
35.65
Special offer
Online exclusive
Ends: 30-Jun-2026
42.30Save 6.65 (16%)
Each
Chemical Identifiers
CAS493-52-7
IUPAC Name2-{2-[4-(dimethylamino)phenyl]diazen-1-yl}benzoic acid
Molecular FormulaC15H15N3O2
InChI KeyCEQFOVLGLXCDCX-UHFFFAOYSA-N
SMILESCN(C)C1=CC=C(C=C1)N=NC1=CC=CC=C1C(O)=O
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Specifications
Specification Sheet
Specification SheetCommentClarity of alcohol solution P.T.
CommentVisual transition interval from pH 4.2 (pink) to 6.2 (yellow)
Melting Point179-182° (range)
pH indicator in pH range 4.2 - 6.3Methyl red is used as a pH indicator. It is red in pH less than 4.4 and yellow in pH over 6.2. It is used to study its degradation using Fenton's reagent. In microbiology, it is used to identify bacteria producing stable acids by mechanisms of mixed acid fermentation of glucose.
This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.
RUO – Research Use Only