Ponceau xylidine

Name: Ponceau xylidine
Brand: Vaqora Chemicals
SKU: VQ-000688

About Ponceau xylidine

Listed under CAS 3761-53-3, Ponceau xylidine is a biological stain available from Vaqora Chemicals. With the molecular formula C18H14N2Na2O7S2, it has a molar mass of 480.4 g/mol. The IUPAC name is disodium, 4-[(2,4-dimethylphenyl)diazenyl]-3-hydroxynaphthalene-2,6-disulfonate. Alternative names: Acid Red 26 and Ponceau 2 R.

In its supplied form it is a brownish red powder. Store in a tightly closed container in a cool, dry and well-ventilated place. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

Key uses span histology and cytology staining, microscopy, clinical laboratories and biological staining. Typical end-use sectors are academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

Available in 5 g, 25 g, 100 g and 1 kg packs, Ponceau xylidine is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Biological staining

Industries

Specifications & identifiers

Chemical identifiers
Product name	Ponceau xylidine
Catalogue No.	VQ-000688
CAS Number	3761-53-3
IUPAC name	disodium;4-[(2,4-dimethylphenyl)diazenyl]-3-hydroxynaphthalene-2,6-disulfonate
Molecular formula	C₁₈H₁₄N₂Na₂O₇S₂
Molecular weight	480.4 g/mol
Exact mass	480.0038
HSN code	32049000
InChIKey	DKUHOIWLFSTHJN-UHFFFAOYSA-L
SMILES	CC1=CC(=C(C=C1)N=NC2=C3C=C(C=CC3=CC(=C2O)S(=O)(=O)[O-])S(=O)(=O)[O-])C.[Na+].[Na+]
PubChem CID	19579

Physical properties
Physical form	Powder
Appearance	Brownish red powder
H-bond donors / acceptors	1 / 9
TPSA	176 Å²
Synonyms	Acid Red 26, Ponceau 2 R, Xylidine ponceau 2R, Xylidine ponceau, 4-((2,4-Dimethylphenyl)azo)-3-hydroxy-2,7-naphthalenedisulfonic acid, disodium salt, C.I. Food Red 5, Ponceau de xylidine, Ponceau Red R, Disodium 4-[(2,4-dimethylphenyl)diazenyl]-3-hydroxynaphthalene-2,6-disulfonate, disodium 4-[(E)-(2,4-dimethylphenyl)diazenyl]-3-hydroxynaphthalene-2,6-disulfonate

Safety & hazard information (GHS)

Health hazard

Signal word: Warning

Hazard statements

H351Suspected of causing cancer

Precautionary statements: P281

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 3761-53-3

Microscopy

Xylidine ponceau

CAS: 3761-53-3
Formula: C₁₈H₁₄N₂Na₂O₇S₂
MW: 480.4 g/mol

VQ-000738

Frequently asked questions

What is the CAS number of Ponceau xylidine?

The CAS Registry Number of Ponceau xylidine is 3761-53-3. It is also known as Acid Red 26, Ponceau 2 R, Xylidine ponceau 2R.

What is the molecular formula and molecular weight of Ponceau xylidine?

Ponceau xylidine has the molecular formula C18H14N2Na2O7S2 and a molecular weight of 480.4 g/mol.

Which grade and pack sizes of Ponceau xylidine can I order?

We supply Ponceau xylidine, in 5 g, 25 g, 100 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Ponceau xylidine?

Yes. Every lot of Ponceau xylidine 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 Ponceau xylidine be shipped internationally?

Yes. Ponceau xylidine 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.