Sudan IV

Name: Sudan IV
Brand: Vaqora Chemicals
SKU: VQ-000713

About Sudan IV

Sudan IV is a biological stain (Microscopy grade) carrying the CAS registry number 85-83-6. The compound has the formula C24H20N4O, corresponding to a molecular weight of 380.4 g/mol. Systematically, it is named 1-[[2-methyl-4-[(2-methylphenyl)diazenyl]phenyl]diazenyl]naphthalen-2-ol. Common synonyms include Biebrich scarlet R fat soluble and Fat Ponceau R or 4.

The product is provided as a powder. Reported physical data include a melting point of 199 °C (dec.). Store sealed in a dry, well-ventilated location away from incompatible materials. It carries the GHS signal word “Warning” with 2 hazard statements. 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.

Standard pack sizes are 10 g, 25 g, 100 g and 1 kg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Biological staining

Industries

Specifications & identifiers

Chemical identifiers
Product name	Sudan IV
Catalogue No.	VQ-000713
CAS Number	85-83-6
IUPAC name	1-[[2-methyl-4-[(2-methylphenyl)diazenyl]phenyl]diazenyl]naphthalen-2-ol
Molecular formula	C₂₄H₂₀N₄O
Molecular weight	380.4 g/mol
Exact mass	380.1637
Grade	Microscopy
HSN code	32049000
InChIKey	RCTGMCJBQGBLKT-UHFFFAOYSA-N
SMILES	CC1=CC=CC=C1N=NC2=CC(=C(C=C2)N=NC3=C(C=CC4=CC=CC=C43)O)C
PubChem CID	62330

Physical properties
Physical form	Powder
Appearance	Powder
Melting point	199 °C (dec.)
LogP (XLogP3)	7.1
H-bond donors / acceptors	1 / 5
TPSA	69.7 Å²
Synonyms	Biebrich scarlet R fat soluble, Fat Ponceau R or 4, Lipid Crimson, Oil Red IV, Scarlet Red Scharlach, Solvent Red 24, Sudan R or BB, Scarlet red, C.I. Solvent Red 24, Waxoline Red OM, Fat Ponceau R, Lacquer Red VS

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
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 85-83-6

Synthesis

Sudan IV solution

CAS: 85-83-6
Formula: C₂₄H₂₀N₄O
MW: 380.4 g/mol

VQ-003644

Frequently asked questions

What is the CAS number of Sudan IV?

The CAS Registry Number of Sudan IV is 85-83-6. It is also known as Biebrich scarlet R fat soluble, Fat Ponceau R or 4, Lipid Crimson.

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

Sudan IV has the molecular formula C24H20N4O and a molecular weight of 380.4 g/mol. Its IUPAC name is 1-[[2-methyl-4-[(2-methylphenyl)diazenyl]phenyl]diazenyl]naphthalen-2-ol.

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

We supply Sudan IV in Microscopy grade, in 10 g, 25 g, 100 g, 1 kg, 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Sudan IV?

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

Yes. Sudan IV 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.