靛蓝

Description

Indigo is identified by CAS 482-89-3, molecular formula C16H10N2O2 and molecular weight 262.07 g/mol. UNII 1G5BK41P4F; InChIKey COHYTHOBJLSHDF-BUHFOSPRSA-N.

Identification

CAS Registry Number	482-89-3
PubChem CID	135436515
Molecular formula	C16H10N2O2
Molecular weight	262.07 g/mol
IUPAC name	sodium 2-(3-hydroxy-5-sulfo-1H-indol-2-yl)-3-oxoindole-5-sulfonic acid
InChIKey	COHYTHOBJLSHDF-BUHFOSPRSA-N
UNII (FDA)	1G5BK41P4F

Computed Descriptors

Molecular Weight	445.4
Hydrogen Bond Donor Count	4
Hydrogen Bond Acceptor Count	9
Rotatable Bond Count	3
Exact Mass	444.97762691
Monoisotopic Mass	444.97762691
Topological Polar Surface Area	191
Heavy Atom Count	29
Formal Charge	1
Complexity	904

Physical description & handling notes

• Water soluble, dark blue powder; [CHEMINFO]

Documented Uses

• 3,3'-Dioxo-(delta-2,2'-biindoline)-5,5'-disulfonic acid disodium salt. An indolesulfonic acid that is used as a dye in renal function testing and as a reagent for the detection of nitrates and chlorates and in the testing of milk. [ChemIDplus]

Synonyms

FD&C Blue 2; Indigokarmin; LBlau 2; Sanei Indigo Carmine; RefChem:598822; Disodium 5,5'disulfoindigo; Sodium indigo5,5'bisulfonate; Disodium indigo5,5disulfonate; Sodium 5,5'indigotindisulfonate; 2,3dihydro3oxo1Hindole5sulfonate; Dinatrium indigolin5,5'disulfonat; Disodium 5,5'indigotin disulfonate; Indigotin5,5'disulfonic acid disodium salt; Disodium salt of 1indigotinS,S'disulfonic acid; Disodium salt of 1indigotinS,S'disulphonic acid; Disodium 2(1,3dihydro3oxo5sulfo2Hindol2ylidene)

Frequently Asked Questions

What are the CAS number and molecular formula of Indigo?

CAS 482-89-3; molecular formula C16H10N2O2; molecular weight 262.07 g/mol.

What other names is Indigo known by?

FD&C Blue 2, Indigokarmin, LBlau 2, Sanei Indigo Carmine, RefChem:598822, Disodium 5,5'disulfoindigo.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.