40462

Red 2G

analytical standard

• Synonym(s): Acid Red 1, Amido Naphthol Red G, Azophloxine
• Empirical Formula (Hill Notation): C₁₈H₁₃N₃Na₂O₈S₂
• CAS Number: 3734-67-6
• Molecular Weight: 509.42
• NACRES: NA.24
• E Number: E128
• PubChem Substance ID: 329755991
• UNSPSC Code: 85151701
• EC Number: 223-098-9
• MDL number: MFCD00003954
• Beilstein/REAXYS Number: 4121767

Properties

• grade: analytical standard
• Quality Segment: 100
• assay: ≥98.0% (HPLC)
• technique(s): HPLC: suitable, gas chromatography (GC): suitable
• application(s): cleaning products; cosmetics; food and beverages; personal care
• format: neat
• SMILES string: [Na+].[Na+].CC(=O)Nc1cc(cc2cc(c(\N=N\c3ccccc3)c(O)c12)S([O-])(=O)=O)S([O-])(=O)=O
• InChI: 1S/C18H15N3O8S2.2Na/c1-10(22)19-14-9-13(30(24,25)26)7-11-8-15(31(27,28)29)17(18(23)16(11)14)21-20-12-5-3-2-4-6-12;;/h2-9,23H,1H3,(H,19,22)(H,24,25,26)(H,27,28,29);;/q;2*+1/p-2/b21-20+;;
• InChI key: WXLFIFHRGFOVCD-SERMZQFOSA-L

Description

General description

Red 2G is a compound, which belongs to the azo family of dyes, generally used in textile industry.It can mainly find applications in non-linear optical studies.

This substance belongs to the class of azo dyes. Find here acomprehensive listing of all our food colorant reference materials.

Red 2G (E-128) is used for the quality control in food products. It belongs to the class of water-soluble synthetically prepared, food color additives, reportedly banned by the European and United states union. These synthetic food colors are commonly used to compensate for the loss of natural colors of food, destroyed during processing and storage. They also maintain and improve the color appearance in food products. E-128 is a mono azo dye, reported to cause increased iron deposition in the human kidney. It finds applications as a color additive in burger meat and sausages.

Application

Refer to the product′s Certificate of Analysis for more information on a suitable instrument technique. Contact Technical Service for further support.

Red 2G may be used as an analytical reference standard for the quantification of the analyte in:

• Drinks and candies using reversed-phase high-performance liquid chromatography with photodiode array detection (RP-HPLC-PDA).
• Food products, beverages and water-soluble foods using reversed-phase high-performance liquid chromatography with diode array detection (RP-HPLC-DAD).

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• pictograms: GHS07
• signalword: Warning
• hcodes: H317
• pcodes: P261 - P272 - P280 - P302 + P352 - P333 + P313 - P362 + P364
• Hazard Classifications: Skin Sens. 1B