Indigo carmine, GR

Name: Indigo carmine, GR
Brand: Vaqora Chemicals
SKU: VQ-000602

About Indigo carmine, GR

Indigo carmine (CAS 860-22-0) is a biological stain offered by Vaqora Chemicals in AR grade. Its molecular formula is C16H8N2Na2O8S2 and its molecular weight is 466.4 g/mol. Systematically, it is named disodium, 2-(3-hydroxy-5-sulfonato-1H-indol-2-yl)-3-oxoindole-5-sulfonate. Alternative names: Acid Blue 74 and Indigo-5,5'-disulfonic acid disodium salt.

In its supplied form it is a dark blue-violet powder. Key physical data: a melting point of above 300 °C. Store sealed in a dry, well-ventilated location away from incompatible materials. Good laboratory practice and suitable PPE are recommended during handling.

It is commonly used for histology and cytology staining, microscopy, clinical laboratories and indicator for titrations. Typical end-use sectors are academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

Vaqora Chemicals supplies Indigo carmine in 25 g, 100 g, 1 kg and 25 kg packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Indicator for titrations

Industries

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Indigo carmine, GR
Catalogue No.	VQ-000602
CAS Number	860-22-0
IUPAC name	disodium;2-(3-hydroxy-5-sulfonato-1H-indol-2-yl)-3-oxoindole-5-sulfonate
Molecular formula	C₁₆H₈N₂Na₂O₈S₂
Molecular weight	466.4 g/mol
Exact mass	465.9517
Grade	AR
HSN code	32049000
InChIKey	JFVXEJADITYJHK-UHFFFAOYSA-L
SMILES	C1=CC2=C(C=C1S(=O)(=O)[O-])C(=C(N2)C3=NC4=C(C3=O)C=C(C=C4)S(=O)(=O)[O-])O.[Na+].[Na+]
PubChem CID	2723854

Physical properties
Physical form	Powder
Appearance	Dark blue-violet powder
Melting point	>300 °C
H-bond donors / acceptors	2 / 9
TPSA	197 Å²
Synonyms	Acid Blue 74, Indigo-5,5'-disulfonic acid disodium salt, Indigocarmine, Indigotindisulfonate sodium, Indigotine, Sodium 3,3'-dioxo-[2,2'-biindolinylidene]-5,5'-disulfonate, Indigocarmin, C.I. Food Blue 1, FD & C blue no. 2, Amacid Brilliant Blue, Indigotine Lake, Indocarmine F

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Indigo carmine, GR?

The CAS Registry Number of Indigo carmine, GR is 860-22-0. It is also known as Acid Blue 74, Indigo-5,5'-disulfonic acid disodium salt, Indigocarmine.

What is the molecular formula and molecular weight of Indigo carmine, GR?

Indigo carmine, GR has the molecular formula C16H8N2Na2O8S2 and a molecular weight of 466.4 g/mol.

Which grade and pack sizes of Indigo carmine, GR can I order?

We supply Indigo carmine, GR in AR grade, in 25 g, 100 g, 1 kg, 25 kg, 4 x 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Indigo carmine, GR?

Yes. Every lot of Indigo carmine, GR is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Indigo carmine, GR be shipped internationally?

Yes. We export Indigo carmine, GR worldwide by air and sea freight or express courier, on EXW, FOB, CIF, CFR or DAP Incoterms, with full export documentation.