Sudan III

Name: Sudan III
Brand: Vaqora Chemicals
SKU: VQ-000712

About Sudan III

Vaqora Chemicals supplies Sudan III (Microscopy grade), a biological stain registered under CAS number 85-86-9. Its molecular formula is C22H16N4O and its molecular weight is 352.4 g/mol. The IUPAC name is 1-[(4-phenyldiazenylphenyl)diazenyl]naphthalen-2-ol. Alternative names: 1-[4-(Phenylazo)phenylazo]-2-naphthol and Cerasin Red.

The product is provided as a powder. Key physical data: a melting point of 199 °C (dec.). Store in a tightly closed container in a cool, dry and well-ventilated place. Under GHS it is labelled “Danger”, so handle it with suitable PPE and consult the SDS.

Key uses span histology and cytology staining, microscopy, clinical laboratories and biological staining. Buyers come mainly from academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

We offer Sudan III in 10 g, 25 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
Biological staining

Industries

Specifications & identifiers

Chemical identifiers
Product name	Sudan III
Catalogue No.	VQ-000712
CAS Number	85-86-9
IUPAC name	1-[(4-phenyldiazenylphenyl)diazenyl]naphthalen-2-ol
Molecular formula	C₂₂H₁₆N₄O
Molecular weight	352.4 g/mol
Exact mass	352.1324
Grade	Microscopy
HSN code	32041949
InChIKey	FHNINJWBTRXEBC-UHFFFAOYSA-N
SMILES	C1=CC=C(C=C1)N=NC2=CC=C(C=C2)N=NC3=C(C=CC4=CC=CC=C43)O
PubChem CID	62331

Physical properties
Physical form	Powder
Appearance	Powder
Melting point	199 °C (dec.)
LogP (XLogP3)	5.9
H-bond donors / acceptors	1 / 5
TPSA	69.7 Å²
Synonyms	1-[4-(Phenylazo)phenylazo]-2-naphthol, Cerasin Red, Fat Ponceau G, Fat Soluble Sudan, Scarlet B, Solvent Red 23, Sudan G, Sudan Red BK, Tony Red, C.I. Solvent Red 23, Toney Red, Fettponceau G

Safety & hazard information (GHS)

Corrosive

Harmful / irritant

Signal word: Danger

Hazard statements

H315Causes skin irritation
H318Causes serious eye damage

Precautionary statements: P264, P264 + P265, P280, P302 + P352, P305 + P354 + P338, P317, P321, P332 + P317, P362 + P364

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 85-86-9

Sudan III solution

CAS: 85-86-9
Formula: C₂₂H₁₆N₄O
MW: 352.4 g/mol

VQ-003643

Frequently asked questions

What is the CAS number of Sudan III?

The CAS Registry Number of Sudan III is 85-86-9. It is also known as 1-[4-(Phenylazo)phenylazo]-2-naphthol, Cerasin Red, Fat Ponceau G.

What is the molecular formula and molecular weight of Sudan III?

Sudan III has the molecular formula C22H16N4O and a molecular weight of 352.4 g/mol. Its IUPAC name is 1-[(4-phenyldiazenylphenyl)diazenyl]naphthalen-2-ol.

Which grade and pack sizes of Sudan III can I order?

We supply Sudan III in Microscopy grade, in 10 g, 25 g, 100 g, 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 Sudan III?

Yes. Every lot of Sudan III 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 Sudan III be shipped internationally?

Yes. Sudan III 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.