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MilliporeSigma
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Key Documents

1.09196

Supelco

Alkali blue (C.I. 42765)

passes application test for DIN 51558

Synonym(s):

Alkali blue (C.I. 42765)

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About This Item

Empirical Formula (Hill Notation):
C37H29N3O3S
CAS Number:
1324-76-1
Molecular Weight:
595.71
UNSPSC Code:
12171503
EC Index Number:
215-385-2
NACRES:
NA.21

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

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 λmax. (Ethanol): 597 - 602 nm
Spec. Absorptivity A 1%/1cm (λmax; 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

Certificates of Analysis (COA)

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