Sunset yellow

Name: Sunset yellow
Brand: Vaqora Chemicals
SKU: VQ-000716

About Sunset yellow

Sunset yellow is a biological stain carrying the CAS registry number 2783-94-0. The compound has the formula C16H10N2Na2O7S2, corresponding to a molecular weight of 452.4 g/mol. Systematically, it is named disodium, 6-hydroxy-5-[(4-sulfonatophenyl)diazenyl]naphthalene-2-sulfonate. It is also known as Food yellow 3 or FD and C Yellow 6.

The product is provided as a solid. Key physical data: a melting point of above 300 °C. Keep the container tightly sealed and store it in a cool, dry area. 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, clinical laboratories and food and flavour applications. Buyers come mainly from academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

Vaqora Chemicals supplies Sunset yellow in 25 g, 100 g and 1 kg packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Food & flavour applications

Industries

Specifications & identifiers

Chemical identifiers
Product name	Sunset yellow
Catalogue No.	VQ-000716
CAS Number	2783-94-0
IUPAC name	disodium;6-hydroxy-5-[(4-sulfonatophenyl)diazenyl]naphthalene-2-sulfonate
Molecular formula	C₁₆H₁₀N₂Na₂O₇S₂
Molecular weight	452.4 g/mol
Exact mass	451.9725
HSN code	29420090
InChIKey	OIQPTROHQCGFEF-UHFFFAOYSA-L
SMILES	C1=CC(=CC=C1N=NC2=C(C=CC3=C2C=CC(=C3)S(=O)(=O)[O-])O)S(=O)(=O)[O-].[Na+].[Na+]
PubChem CID	17730

Physical properties
Physical form	Solid
Appearance	Solid
Melting point	>300 °C
H-bond donors / acceptors	1 / 9
TPSA	176 Å²
Synonyms	Food yellow 3, FD&C Yellow 6, Sunset Yellow FCF, C.I. Food Yellow 3, Orange Yellow S, FD&C Yellow No. 6, Gelborange-S, FD&C yellow no.6, C.I. Direct Yellow 11, FD & C Yellow No. 6, Food Yellow No.5, Dye FDC Yellow No. 6

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, 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

Frequently asked questions

What is the CAS number of Sunset yellow?

The CAS Registry Number of Sunset yellow is 2783-94-0. It is also known as Food yellow 3, FD&C Yellow 6, Sunset Yellow FCF.

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

Sunset yellow has the molecular formula C16H10N2Na2O7S2 and a molecular weight of 452.4 g/mol.

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

We supply Sunset yellow, in 25 g, 100 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Sunset yellow?

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

Yes. Sunset 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.