Alizarin yellow G

Name: Alizarin yellow G
Brand: Vaqora Chemicals
SKU: VQ-000459

About Alizarin yellow G

Vaqora Chemicals supplies Alizarin yellow G in Synthesis grade, a biological stain registered under CAS number 2243-76-7 at a purity of 70%. Formula C13H9N3O5, molecular weight 287.23 g/mol. Its systematic (IUPAC) name is 2-hydroxy-5-[(4-nitrophenyl)diazenyl]benzoic acid. It is also known as Mordant Orange 1 or 5-(4-Nitrophenylazo)salicylic acid.

In its supplied form it is a brown to very dark brown powder. Literature values give a melting point of above 300 °C. Store sealed in a dry, well-ventilated location away from incompatible materials. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

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

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

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories

Industries

Specifications & identifiers

Chemical identifiers
Product name	Alizarin yellow G
Catalogue No.	VQ-000459
CAS Number	2243-76-7
IUPAC name	2-hydroxy-5-[(4-nitrophenyl)diazenyl]benzoic acid
Molecular formula	C₁₃H₉N₃O₅
Molecular weight	287.23 g/mol
Exact mass	287.0542
Grade	Synthesis
Purity / assay	70%
HSN code	32041268
InChIKey	YVJPMMYYRNHJAU-UHFFFAOYSA-N
SMILES	C1=CC(=CC=C1N=NC2=CC(=C(C=C2)O)C(=O)O)[N+](=O)[O-]
PubChem CID	15588

Physical properties
Physical form	Powder
Appearance	Brown to very dark brown powder
Melting point	>300 °C
LogP (XLogP3)	4.1
H-bond donors / acceptors	2 / 7
TPSA	128 Å²
Synonyms	Mordant Orange 1, 5-(4-Nitrophenylazo)salicylic acid, Alizarin Yellow R, MO1, Alizarine Yellow R, 5-(p-Nitrophenylazo)salicylic acid, Alizarine Yellow RW, C.I. Mordant Orange 1, Benzoic acid, 2-hydroxy-5-[(4-nitrophenyl)azo]-, 2-Hydroxy-5-((4-nitrophenyl)diazenyl)benzoic acid, Chrome Orange R, Benzoic acid, 2-hydroxy-5-((4-nitrophenyl)azo)-

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed
H319Causes serious eye irritation

Precautionary statements: 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 2243-76-7

AR / Microscopy

Alizarin yellow G, for microscopy 70.0%

CAS: 2243-76-7
Formula: C₁₃H₉N₃O₅
MW: 287.23 g/mol

VQ-046183

Frequently asked questions

What is the CAS number of Alizarin yellow G?

The CAS Registry Number of Alizarin yellow G is 2243-76-7. It is also known as Mordant Orange 1, 5-(4-Nitrophenylazo)salicylic acid, Alizarin Yellow R.

What is the molecular formula and molecular weight of Alizarin yellow G?

Alizarin yellow G has the molecular formula C13H9N3O5 and a molecular weight of 287.23 g/mol. Its IUPAC name is 2-hydroxy-5-[(4-nitrophenyl)diazenyl]benzoic acid.

Which grade and pack sizes of Alizarin yellow G can I order?

We supply Alizarin yellow G in Synthesis (70%) grade, in 5 g, 25 g, 100 g, 5 x 1 kg, 4 x 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Alizarin yellow G?

Yes. Every lot of Alizarin yellow 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 Alizarin yellow G be shipped internationally?

Yes. Alizarin yellow 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.