Sigma-Aldrich Alkali Blue (C.I. 42765) I

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

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

Related Categories

Indicators

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

Storage Class

11 - Combustible Solids

Wgk_Germany

WGK 3

Flash_Point_F

Not applicable

Flash_Point_C

Not applicable