Xylidine ponceau

Name: Xylidine ponceau
Brand: Vaqora Chemicals
SKU: VQ-000738

About Xylidine ponceau

Vaqora Chemicals supplies Xylidine ponceau in Microscopy grade, a biological stain registered under CAS number 3761-53-3. Formula C18H14N2Na2O7S2, molecular weight 480.4 g/mol. The IUPAC name is disodium, 4-[(2,4-dimethylphenyl)diazenyl]-3-hydroxynaphthalene-2,6-disulfonate. Common synonyms include Acid Red 26 and Ponceau 2 R.

The material typically appears as a black powder. Keep the container tightly sealed and store it in a cool, dry area. It carries the GHS signal word “Warning” with 1 hazard statement. Review the Safety Data Sheet before use.

Key uses span histology and cytology staining, microscopy, clinical laboratories and biological staining. Our customers for this product work in academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

We offer Xylidine ponceau in 25 g, 100 g, 5 x 1 kg and 25 kg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Biological staining

Industries

Specifications & identifiers

Chemical identifiers
Product name	Xylidine ponceau
Catalogue No.	VQ-000738
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
Grade	Microscopy
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	Black powder
H-bond donors / acceptors	1 / 9
TPSA	176 Å²
Synonyms	Acid Red 26, Ponceau 2 R, Xylidine ponceau 2R, Colour Index Number 16150, 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

Ponceau xylidine

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

VQ-000688

Frequently asked questions

What is the CAS number of Xylidine ponceau?

The CAS Registry Number of Xylidine ponceau 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 Xylidine ponceau?

Xylidine ponceau has the molecular formula C18H14N2Na2O7S2 and a molecular weight of 480.4 g/mol.

Which grade and pack sizes of Xylidine ponceau can I order?

We supply Xylidine ponceau in Microscopy grade, in 25 g, 100 g, 5 x 1 kg, 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Xylidine ponceau?

Yes. Every lot of Xylidine ponceau 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 Xylidine ponceau be shipped internationally?

Yes. Xylidine ponceau 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.