Methyl red, pH indicator (ab146368)
Key features and details
- pH indicator.
- CAS Number: 493-52-7
- Form / State: Solid
- Source: Synthetic
Overview
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Product name
Methyl red, pH indicator -
Description
pH indicator. -
Alternative names
- 2-(4-Dimethylaminophenylazo)benzoic acid
- Acid Red 2
- C.I. Acid Red 2
- O-Methyl red
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Biological description
pH indicator. Azo dye used in the methyl red (MR) test to identify bacteria producing stable acids by mechanisms of mixed acid fermentation of glucose. The transition range is pH 4.4 (red) to pH 6.2 (yellow).
Absorption: λmax 410 nm
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CAS Number
493-52-7 -
Chemical structure
Properties
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Chemical name
2-[[4-(Dimethylamino)phenyl]azo]benzoic acid -
Molecular weight
269.30 -
Molecular formula
C15H15N3O2 -
Storage instructions
Store at Room Temperature. The product can be stored for up to 12 months. -
Handling
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
Need more advice on solubility, usage and handling? Please visit our frequently asked questions (FAQ) page for more details.
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Source
Synthetic
