Azorubin S

Name: Azorubin S
Brand: Vaqora Chemicals
SKU: VQ-000482

About Azorubin S

Vaqora Chemicals supplies Azorubin S (Microscopy grade), a biological stain registered under CAS number 3567-69-9. Its molecular formula is C20H12N2Na2O7S2 and its molecular weight is 502.4 g/mol. The IUPAC name is disodium, 4-hydroxy-3-[(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-1-sulfonate. Alternative names: Acid Red 14 and Mordant Blue 79.

In its supplied form it is a brown powder. Keep the container tightly sealed and store it in a cool, dry area. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

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

We offer Azorubin S in 5 g, 100 g and 1 kg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Food & flavour applications

Industries

Specifications & identifiers

Chemical identifiers
Product name	Azorubin S
Catalogue No.	VQ-000482
CAS Number	3567-69-9
IUPAC name	disodium;4-hydroxy-3-[(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-1-sulfonate
Molecular formula	C₂₀H₁₂N₂Na₂O₇S₂
Molecular weight	502.4 g/mol
Exact mass	501.9881
Grade	Microscopy
HSN code	32041219
InChIKey	YSVBPNGJESBVRM-UHFFFAOYSA-L
SMILES	C1=CC=C2C(=C1)C(=CC=C2S(=O)(=O)[O-])N=NC3=C(C4=CC=CC=C4C(=C3)S(=O)(=O)[O-])O.[Na+].[Na+]
PubChem CID	19118

Physical properties
Physical form	Powder
Appearance	Brown powder
H-bond donors / acceptors	1 / 9
TPSA	176 Å²
Synonyms	Acid Red 14, Disodium 4-hydroxy-3-[(4-sulfo-1-naphthalenyl)azo]-1-naphthalenesulfonate, Mordant Blue 79, azorubine, Carmoisine, Azo Rubine, Chromotrope FB, C.I. Acid Red 14, Azorubin, Acid Rubine, C.I. Food Red 3, Karmesin

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P305 + P351 + P338

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 3567-69-9

Extra Pure

Azorubin S, extra pure 50%

CAS: 3567-69-9
Formula: C₂₀H₁₂N₂Na₂O₇S₂
MW: 502.4 g/mol

VQ-045767

Microscopy

Carmoisine A

CAS: 3567-69-9
Formula: C₂₀H₁₂N₂Na₂O₇S₂
MW: 502.4 g/mol

VQ-000531

Frequently asked questions

What is the CAS number of Azorubin S?

The CAS Registry Number of Azorubin S is 3567-69-9. It is also known as Acid Red 14, Disodium 4-hydroxy-3-[(4-sulfo-1-naphthalenyl)azo]-1-naphthalenesulfonate, Mordant Blue 79.

What is the molecular formula and molecular weight of Azorubin S?

Azorubin S has the molecular formula C20H12N2Na2O7S2 and a molecular weight of 502.4 g/mol.

Which grade and pack sizes of Azorubin S can I order?

We supply Azorubin S in Microscopy grade, in 5 g, 100 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Azorubin S?

Yes. Every lot of Azorubin S 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 Azorubin S be shipped internationally?

Yes. Azorubin S 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.