1.11747

Sudan III, C.I. 26100

• Synonym(s): Sudan III, C.I. 26100, 1-(4-Phenylazophenylazo)-2-naphthol
• Empirical Formula (Hill Notation): C₂₂H₁₆N₄O
• CAS Number: 85-86-9
• Molecular Weight: 352.39
• MDL number: MFCD00003905
• UNSPSC Code: 12352104
• EC Index Number: 201-638-4
• NACRES: NB.21

Properties

• form: solid
• Quality Level: 200
• loss: ≤2% loss on drying, 110°C
• mp: 199 °C (decomposition)
• λmax: 506-512 nm in toluene
• storage temp.: 2-30°C
• InChI: 1S/C22H16N4O/c27-21-15-10-16-6-4-5-9-20(16)22(21)26-25-19-13-11-18(12-14-19)24-23-17-7-2-1-3-8-17/h1-15,25H/b24-23?,26-22-
• InChI key: HTPQPMPFXUWUOT-SRURNFRUSA-N

Description

Application

Sudan III is a non-ionic fat-soluble dye (lysochrome) that belongs to the class of azo-dye. It is predominantly used for staining lipids, triglycerides, and intracellular lipoproteins. It is also used for coloring textiles, plastics wax, floor polish, varnish, spirit lacquers, externally applied drugs, cosmetics, and contact lenses.

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Absorption maximum λ_max. (toluene): 506 - 512 nm
Spec. Absorptivity A 1%/1cm (λ_max.; 0.005 g/l; Toluol): ≥ 750
TLC-Test: passes test
Loss on drying (110 °C): ≤ 2 %

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable