Congo red, indicator

Name: Congo red, indicator
Brand: Vaqora Chemicals
SKU: VQ-000539

About Congo red, indicator

Vaqora Chemicals supplies Congo red, indicator (Microscopy grade), a biological stain registered under CAS number 573-58-0. The compound has the formula C32H22N6Na2O6S2, corresponding to a molecular weight of 696.7 g/mol. Common synonyms include Congo Red 4B and Cosmos Red.

It is supplied as a powder. Key physical data: a melting point of above 360 °C. Store in a tightly closed container in a cool, dry and well-ventilated place. Good laboratory practice and suitable PPE are recommended during handling.

It is commonly used for histology and cytology staining, microscopy and clinical laboratories. Buyers come mainly from academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

Standard pack sizes are 25 g, 100 g, 250 g and 1 kg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories

Industries

Specifications & identifiers

Chemical identifiers
Product name	Congo red, indicator
Catalogue No.	VQ-000539
CAS Number	573-58-0
IUPAC name	disodium;4-amino-3-[[4-[4-[(1-amino-4-sulfonatonaphthalen-2-yl)diazenyl]phenyl]phenyl]diazenyl]naphthalene-1-sulfonate
Molecular formula	C₃₂H₂₂N₆Na₂O₆S₂
Molecular weight	696.7 g/mol
Exact mass	696.0838
Grade	Microscopy
HSN code	32041421
InChIKey	IQFVPQOLBLOTPF-UHFFFAOYSA-L
SMILES	C1=CC=C2C(=C1)C(=CC(=C2N)N=NC3=CC=C(C=C3)C4=CC=C(C=C4)N=NC5=C(C6=CC=CC=C6C(=C5)S(=O)(=O)[O-])N)S(=O)(=O)[O-].[Na+].[Na+]
PubChem CID	11313

Physical properties
Physical form	Powder
Appearance	Powder
Melting point	>360 °C
H-bond donors / acceptors	2 / 12
TPSA	233 Å²
Synonyms	Congo Red 4B, Cosmos Red, Cotton Red B, Cotton Red C, Direct Red 28, Direct Red R, Direct Red Y, C.I. Direct Red 28, Congazone sodium, Benzo Congo Red, Mitsui Congo Red, Cotton Red L

Documents

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

Other grades of CAS 573-58-0

Congo red, certified

CAS: 573-58-0
Formula: C₃₂H₂₂N₆Na₂O₆S₂
MW: 696.7 g/mol

VQ-000538

ACS

Congo red, certified, ACS

CAS: 573-58-0
Formula: C₃₂H₂₂N₆Na₂O₆S₂
MW: 696.7 g/mol

VQ-046789

Congo red, papers

CAS: 573-58-0
Formula: C₃₂H₂₂N₆Na₂O₆S₂
MW: 696.7 g/mol

VQ-000332

Congo red, solution

CAS: 573-58-0
Formula: C₃₂H₂₂N₆Na₂O₆S₂
MW: 696.7 g/mol

VQ-003534

Frequently asked questions

What is the CAS number of Congo red, indicator?

The CAS Registry Number of Congo red, indicator is 573-58-0. It is also known as Congo Red 4B, Cosmos Red, Cotton Red B.

What is the molecular formula and molecular weight of Congo red, indicator?

Congo red, indicator has the molecular formula C32H22N6Na2O6S2 and a molecular weight of 696.7 g/mol.

Which grade and pack sizes of Congo red, indicator can I order?

We supply Congo red, indicator in Microscopy grade, in 25 g, 100 g, 250 g, 1 kg, 4 x 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Congo red, indicator?

Yes. Every lot of Congo red, indicator 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 Congo red, indicator be shipped internationally?

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