Key features and details
- pH indicator.
- CAS Number: 845-10-3
- Soluble in water and ethanol
- Form / State: Solid
- Source: Synthetic
Product nameMethyl red sodium salt, pH indicator
- Acid Red 2
pH indicator turning red under pH 4.4, yellow over pH 6.2, and orange in between those values. Azo dye used in microbiology to identify bacteria that produce stable acids through mixed acid fermentation of glucose.
Chemical name2-[[4-(Dimethylamino)phenyl]azo]benzoic acid sodium salt
Storage instructionsStore at Room Temperature. The product can be stored for up to 12 months.
Solubility overviewSoluble in water and ethanol
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.
To our knowledge, customised protocols are not required for this product. Please try the standard protocols listed below and let us know how you get on.
ab146369 has not yet been referenced specifically in any publications.