Methyl red-methylene blue indicator
pH: 4.2 (pink or red) to pH 6.2 (yellow)
Reagent
Code: #93396
Alias
Methyl red; methane red, alkane red, methane red, p-dimethylaminoazobenzene o-carboxylic acid, acid red 2
CAS Number
493-52-7
Properties
0.1% ethanol solution of methyl red : 0.2% methylene blue solution=5 : 2
science Other reagents with same CAS 493-52-7
blur_circular Chemical Specifications
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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
thermostat
Physical Properties
Melting Point
-114°C
Boiling Point
78°C
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Storage & Handling
Storage
room temperature
description Product Description
Used primarily in microbiology and chemistry labs, this mixed indicator (methyl red-methylene blue) helps differentiate bacterial types based on their metabolic properties, such as acid production in tests like the Methyl Red test, where it turns red in acidic conditions. It serves as a pH indicator in titration experiments and analytical procedures, transitioning from pink or red at pH 4.2 to yellow at pH 6.2. Its distinct color change facilitates precise pH monitoring and observation of metabolic activities.
format_list_bulleted Product Specification
| Test Parameter | Specification |
|---|---|
| Appearance | liquid |
| Visual Transition Interval | from pH 4.2 (pink or red) to pH 6.2 (yellow) |
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