Congo red, papers

Name: Congo red, papers
Brand: Vaqora Chemicals
SKU: VQ-000332

About Congo red, papers

Vaqora Chemicals supplies Congo red, papers, an indicator registered under CAS number 573-58-0. Formula C32H22N6Na2O6S2, molecular weight 696.7 g/mol. Common synonyms include C.I. Direct Red 28 and Congazone sodium.

It is supplied as papers. Store sealed in a dry, well-ventilated location away from incompatible materials. Under GHS it is labelled “Danger”, so handle it with suitable PPE and consult the SDS.

It is commonly used for titration end-point detection, pH determination and analytical testing. Buyers come mainly from academic and industrial research.

Available in 1 pkt and 10 pkt packs, Congo red, papers is dispatched with a Certificate of Analysis (COA) to destinations worldwide. A Safety Data Sheet (SDS) and technical specifications are available on request. Custom pack sizes, bulk quantities and specific analytical data can be arranged on request.

Typical applications

Titration end-point detection
pH determination
Analytical testing

Industries

Specifications & identifiers

Chemical identifiers
Product name	Congo red, papers
Catalogue No.	VQ-000332
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
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	Other
Appearance	Papers
H-bond donors / acceptors	2 / 12
TPSA	233 Å²
Synonyms	C.I. Direct Red 28, Congazone sodium, Benzo Congo Red, Mitsui Congo Red, Cotton Red L, Haemomedical, Hemorrhagyl, Hispamin Congo 4B, Brasilamina congo 4B, Sugai Congo Red, Atul Congo Red, Vondacel Red CL

Safety & hazard information (GHS)

Health hazard

Signal word: Danger

Hazard statements

H350May cause cancer

Precautionary statements: P201, P281, P308 + P313

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

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

Microscopy

Congo red, indicator

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

VQ-000539

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, papers?

The CAS Registry Number of Congo red, papers is 573-58-0. It is also known as C.I. Direct Red 28, Congazone sodium, Benzo Congo Red.

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

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

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

We supply Congo red, papers, in 1 pkt, 10 pkt packs. Larger bulk quantities and custom packing are quoted on request.

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

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

Yes. Congo red, papers is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.