Indigo carmine (Indigotine, 5,5′-indigodisulfonic acid sodium salt, Brilliant Indigo) is an indicator at pH 11.5-14, changing from blue to yellow. It has a role as a food colouring and a histological dye.

Product information

CAS Number: 860-22-0

Molecular Weight: 466.35

Formula: C16H8N2Na2O8S2

Synonym:

Indigotindisulfonate sodium

C.I.Acid Blue 74

Chemical Name: disodium 3-hydroxy-3'-oxo-1H,3'H-[2,2'-biindole]-5,5'-disulfonate

Smiles: [Na+].[Na+].[O-]S(=O)(=O)C1=CC2C(O)=C(NC=2C=C1)C1=NC2C=CC(=CC=2C1=O)S([O-])(=O)=O

InChiKey: JFVXEJADITYJHK-UHFFFAOYSA-L

InChi: 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;;/h1-6,17,19H,(H,21,22,23)(H,24,25,26);;/q;2*+1/p-2

Technical Data

Appearance: Solid Power

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: Solubility (25°C). 93 mg/mL(199.42 mM).

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 ^oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 ^oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200

References:

1. K Takeuchi, et al. Quantitative Determination of Aqueous-Phase Ozone by Chemiluminescence Using indigo-5,5'-disulfonate. Anal Chem. 1989 Mar 15;61(6):619-23.

Products are for research use only. Not for human use.