Indigo carmine

SIAL/73436 - analytical standard

Synonym: Acid Blue 74; Indigo-5,5′-disulfonic acid disodium salt; Indigocarmine

CAS Number: 860-22-0
Empirical Formula (Hill Notation): C₁₆H₈N₂Na₂O₈S₂
Molecular Weight: 466.35
EC Number: 212-728-8
MDL Number: MFCD00005723
Linear Formula: C₁₆H₈N₂Na₂O₈S₂
Product Type: Chemical

Catalog Number	PKG Qty.	Price


45-73436-25MG	25 mg	$227.00 1/EA	Add To Favorites

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Properties
Descriptions
Safety Info.
Basic Data

application(s)	cleaning products cosmetics food and beverages personal care
assay	≥97.0% (HPLC)
format	neat
grade	analytical standard
InChI	1S/C16H10N2O8S2.2Na/c19-15-9-5-7(27(21,22)23)1-3-11(9)17-13(15)14-16(20)10-6-8(28(24,25)26)2-4-12(10)18-14;;/h1-6,17-18H,(H,21,22,23)(H,24,25,26);;/q;2*+1/p-2/b14-13+;;
InChI key	KHLVKKOJDHCJMG-QDBORUFSSA-L
Quality Level	100
shelf life	limited shelf life, expiry date on the label
SMILES string	[Na+].[Na+].[O-]S(=O)(=O)c1ccc2NC(C(=O)c2c1)=C3Nc4ccc(cc4C3=O)S([O-])(=O)=O
technique(s)	gas chromatography (GC): suitable
	HPLC: suitable

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. 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. IC may also be used as an analytical reference standard for the quantification of the analyte in food products using microemulsion electrokinetic chromatography (MEEKC).
Application:	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. 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.
Packaging:	Bottomless glass bottle. Contents are inside inserted fused cone.
Recommended products:	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 .

Symbol	GHS07
Signal word	Warning
Hazard statements	H317
Precautionary statements	P261 - P272 - P280 - P302 + P352 - P333 + P313 - P362 + P364
Hazard Codes	Xn
Risk Statements	22
Safety Statements	22-24/25
RIDADR	NONH for all modes of transport
WGK Germany	WGK 1

Purity	≥97.0% (HPLC)
Colour Index Number	73015
UNSPSC	85151701

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