Product nameIndigo carmine, pH indicator and tissue stain
DescriptionpH indicator and tissue stain.
- Acid Blue 74
- C.I. 73015
- FD&C Blue No. 2
pH indicator (blue at pH 11.4 and yellow at 13.0). Tissue stain. Also a tool for the determination of hypochlorite.
Absorption: λmax 608 nm
Chemical name2-(1,3-Dihydro-3-oxo-5-sulfo-2H-indol-2-ylidene)-2,3-dihydro-3-oxo-1H-Indole-5-sulfonic acid disodium salt
Storage instructionsStore at Room Temperature. The product can be stored for up to 12 months.
Solubility overviewSoluble in water to 10 mM
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.
This product has been referenced in:
- Colegate SM et al. Pro-toxic dehydropyrrolizidine alkaloids in the traditional Andean herbal medicine "asmachilca". J Ethnopharmacol 172:179-94 (2015). Read more (PubMed: 26087231) »
- Harriram A et al. Oxidative degradation of indigocarmine by hypochlorite--a tool for determination of hypochlorite in commercial samples. J Environ Sci Health A Tox Hazard Subst Environ En 38:1055-64 (2003). Read more (PubMed: 12774908) »
- Monson FC et al. Indigocarmine as a quantitative indicator of urothelial integrity. J Urol 145:842-5 (1991). Read more (PubMed: 2005716) »