Sudan yellow

Name: Sudan yellow
Brand: Vaqora Chemicals
SKU: VQ-000714

About Sudan yellow

Listed under CAS 2481-94-9, Sudan yellow is a biological stain available from Vaqora Chemicals in Microscopy grade. Formula C16H19N3, molecular weight 253.34 g/mol. Systematically, it is named N,N-diethyl-4-phenyldiazenylaniline. It is also known as 4-(Diethylamino)azobenzene or Solvent Yellow 56.

The material typically appears as a yellow solid. Store in a tightly closed container in a cool, dry and well-ventilated place. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

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

We offer Sudan yellow in 5 g, 25 g, 500 g and 5 x 1 kg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Dyes & pigments manufacture

Industries

Specifications & identifiers

Chemical identifiers
Product name	Sudan yellow
Catalogue No.	VQ-000714
CAS Number	2481-94-9
IUPAC name	N,N-diethyl-4-phenyldiazenylaniline
Molecular formula	C₁₆H₁₉N₃
Molecular weight	253.34 g/mol
Exact mass	253.1579
Grade	Microscopy
HSN code	29270090
InChIKey	SJJISKLXUJVZOA-UHFFFAOYSA-N
SMILES	CCN(CC)C1=CC=C(C=C1)N=NC2=CC=CC=C2
PubChem CID	17204

Physical properties
Physical form	Solid
Appearance	Yellow solid
LogP (XLogP3)	5.3
H-bond donors / acceptors	0 / 3
TPSA	28 Å²
Synonyms	4-(Diethylamino)azobenzene, Solvent Yellow 56, Diethyl Yellow, 4-Diethylaminoazobenzene, Fat Yellow GGN, p-(Diethylamino)azobenzene, N,N-Diethyl-4-(phenylazo)aniline, Diethylaminoazobenzene, N,N-Diethyl-4-aminoazobenzene, 4-Phenylazo-N,N-diethylaniline, N,N-Diethyl-4-(phenylazo)benzenamine, Benzenamine, N,N-diethyl-4-(phenylazo)-

Safety & hazard information (GHS)

Harmful / irritant

Health hazard

Signal word: Warning

Hazard statements

H302Harmful if swallowed
H312Harmful in contact with skin
H315Causes skin irritation
H317May cause an allergic skin reaction
H319Causes serious eye irritation
H332Harmful if inhaled
H335May cause respiratory irritation
H351Suspected of causing cancer
H412Harmful to aquatic life with long lasting effects

Precautionary statements: P203, P261, P264, P264 + P265, P270, P271, P272, P273, P280, P301 + P317, P302 + P352, P304 + P340, P305 + P351 + P338, P317, P318, P319, P321, P330, P332 + P317, P333 + P317, P337 + P317, P362 + P364, P403 + P233, P405

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 Sudan yellow?

The CAS Registry Number of Sudan yellow is 2481-94-9. It is also known as 4-(Diethylamino)azobenzene, Solvent Yellow 56, Diethyl Yellow.

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

Sudan yellow has the molecular formula C16H19N3 and a molecular weight of 253.34 g/mol. Its IUPAC name is N,N-diethyl-4-phenyldiazenylaniline.

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

We supply Sudan yellow in Microscopy grade, in 5 g, 25 g, 500 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 Sudan yellow?

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

Yes. Sudan yellow 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.