Methyl red pH indicator solution
pH:4.2(RED)-6.2(YELLOW)
Reagent
Code: #206212
Alias
Methyl red; methyl red, alkyl red, methane red, para-dimethylaminoazobenzene ortho-carboxylic acid, acidic red 2
CAS Number
493-52-7
science Other reagents with same CAS 493-52-7
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Molecular Information
Weight
269.3 g/mol
Formula
C₁₅H₁₅N₃O₂
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Registry Numbers
EC Number
207-776-1
MDL Number
MFCD00002425
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Storage & Handling
Storage
Room temperature
description Product Description
Used as a pH indicator in laboratory settings, particularly in microbiology and analytical chemistry. It helps detect changes in acidity, turning red in acidic conditions (pH below 4.4) and yellow in neutral or slightly basic conditions (pH above 6.2). Commonly applied in bacterial culture tests, such as the methyl red test, to identify organisms that produce stable acids from glucose fermentation, like Escherichia coli. Also used in titrations and environmental testing to monitor pH shifts in solutions.
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