Indigo carmine

Application
Indigo carmine may be used as a test material to investigate its interaction with the calf thymus DNA in physiological buffer (pH 7.4) with the use of ethidium bromide (EB) dye as a fluorescence probe by spectroscopic studies.[1] It may be used as an analytical reagent for spectrophotometric determination of pantoprazole sodium sesquihydrate (PNT) in pure form and dosage forms using a bromide-bromide mixture.[2] IC may also be used as an analytical reference standard for the quantification of the analyte in food products using microemulsion electrokinetic chromatography (MEEKC).[3] Refer to the product′s Certificate of Analysis for more information on a suitable instrument technique. Contact Technical Service for further support.
General description
Indigo carmine (IC), a synthetic indigoid dye, belongs to the class of food dyes used to impart colorless foodstuffs a more characteristic appearance as well as to change the original color, texture of the food products and maintain natural color during processing and storage of food products.[1] This product is provided by Sigma-Aldrich, as a neat standard for the precise quality control of food products. In the European Union, E numbers are used as codes for food color additives. E numbers 100-199 include not only artificial food colors derived from petroleum, but also natural additives originating from sources such as vegetables, insects or mixtures made from natural foodstuffs. IC is widely used in a variety of food products including fruit juices, bread, smoked fish, sweets, tomatoes, catsup, dairy, skim milk products, etc.[1] Other Notes
Find a digital Reference Material for this product available on our online platform ChemisTwin® for NMR. You can use this digital equivalent on ChemisTwin® for your sample identity confirmation and compound quantification (with digital external standard). An NMR spectrum of this substance can be viewed and an online comparison against your sample can be performed with a few mouseclicks. Learn more here and start your free trial.
Packaging
Bottomless glass bottle. Contents are inside inserted fused cone.