1.09196

Alkali blue (C.I. 42765)

passes application test for DIN 51558

• Synonym(s): Alkali blue (C.I. 42765)
• Empirical Formula (Hill Notation): C₃₇H₂₉N₃O₃S
• CAS Number: 1324-76-1
• Molecular Weight: 595.71
• MDL number: MFCD00083221
• UNSPSC Code: 12171503
• EC Index Number: 215-385-2
• NACRES: NA.21

Properties

• Agency: suitable for DIN 51558
• Quality Level: 200
• form: solid
• loss: ≤5% loss on drying, 110°C
• visual transition interval: 11.5-13, blue-violet to pink
• λmax: 597-602 nm in ethanol
• storage temp.: 2-30°C
• SMILES string: [S](=O)(=O)([O-])c1c(cccc1)[N+H]=C2C=CC(=C(c5ccc(cc5)Nc6ccccc6)c3ccc(cc3)Nc4ccccc4)C=C2
• InChI: 1S/C37H29N3O3S/c41-44(42,43)36-14-8-7-13-35(36)40-34-25-19-29(20-26-34)37(27-15-21-32(22-16-27)38-30-9-3-1-4-10-30)28-17-23-33(24-18-28)39-31-11-5-2-6-12-31/h1-26,38-39H,(H,41,42,43)
• InChI key: DVPLSZDCYOJSOG-UHFFFAOYSA-N

Description

General description

indicator

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Transition range: pH 11.5 - pH 13.0 blue-violet - dark-pink
Absorption maximum λ_max. (Ethanol): 597 - 602 nm
Spec. Absorptivity A 1%/1cm (λ_max; 0.003 g/l; ethanol abs.; calculated on dried substance): ≥ 1000
TLC-Test: passes test
Loss on drying (110 °C): ≤ 5 %
Suitability as indicator (according to DIN 51558): passes test

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable