Azocarmine G

About Azocarmine G

Azocarmine G is a biological stain (Synthesis grade) carrying the CAS registry number 25641-18-3. The compound has the formula C28H18N3NaO6S2, corresponding to a molecular weight of 579.6 g/mol. Its systematic (IUPAC) name is sodium 7-phenyl-5-(4-sulfonatoanilino)benzo[a]phenazin-7-ium-3-sulfonate. Alternative names: Acid Red 101 and Rosinduline.

The material typically appears as a brown red to purple powder. Reported physical data include a melting point of above 280 °C. Solubility: soluble in water. Store in a tightly closed container in a cool, dry and well-ventilated place. It carries the GHS signal word “Warning” with 3 hazard statements. Review the Safety Data Sheet before use.

Key uses span histology and cytology staining, microscopy and clinical laboratories. It is used across academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

We offer Azocarmine G in 10 g, 25 g, 1 kg and 25 kg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories

Industries

Specifications & identifiers

Chemical identifiers
Product name	Azocarmine G
Catalogue No.	VQ-000478
CAS Number	25641-18-3
IUPAC name	sodium 7-phenyl-5-(4-sulfonatoanilino)benzo[a]phenazin-7-ium-3-sulfonate
Molecular formula	C₂₈H₁₈N₃NaO₆S₂
Molecular weight	579.6 g/mol
Exact mass	579.0535
Grade	Synthesis
HSN code	32049000
InChIKey	LUERODMRBLNCFK-UHFFFAOYSA-M
SMILES	C1=CC=C(C=C1)[N+]2=C3C=C(C4=C(C3=NC5=CC=CC=C52)C=CC(=C4)S(=O)(=O)[O-])NC6=CC=C(C=C6)S(=O)(=O)[O-].[Na+]
PubChem CID	16046101

Physical properties
Physical form	Powder
Appearance	Brown red to purple powder
Melting point	>280 °C
Solubility	Soluble in water
H-bond donors / acceptors	1 / 8
TPSA	160 Å²
Synonyms	Acid Red 101, azocarmin G, Sodium 7-phenyl-5-((4-sulfonatophenyl)amino)benzo[a]phenazin-7-ium-3-sulfonate, C28H18N3NaO6S2, 7-phenyl-5-[(4-sulfophenyl)amino]benzo[a]phenazine-3-sulfonic acid, sodium sal t

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, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

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

Frequently asked questions

What is the CAS number of Azocarmine G?

The CAS Registry Number of Azocarmine G is 25641-18-3. It is also known as Acid Red 101, azocarmin G, Sodium 7-phenyl-5-((4-sulfonatophenyl)amino)benzo[a]phenazin-7-ium-3-sulfonate.

What is the molecular formula and molecular weight of Azocarmine G?

Azocarmine G has the molecular formula C28H18N3NaO6S2 and a molecular weight of 579.6 g/mol. Its IUPAC name is sodium 7-phenyl-5-(4-sulfonatoanilino)benzo[a]phenazin-7-ium-3-sulfonate.

Which grade and pack sizes of Azocarmine G can I order?

We supply Azocarmine G in Synthesis grade, in 10 g, 25 g, 1 kg, 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Azocarmine G?

Yes. Every lot of Azocarmine G 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 Azocarmine G be shipped internationally?

Yes. Azocarmine G 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.