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Supelco

Eriochrome blue-black B (C.I. 14640)

metal indicator

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Synonym(s):
Eriochrome blue-black B (C.I. 14640), 2-Hydroxy-1-(1-hydroxy-2-naphthylazo)-naphthalene-4-sulfonic acid sodium salt
Empirical Formula (Hill Notation):
C20H13N2NaO5S
CAS Number:
3564-14-5
Molecular Weight:
416.38
UNSPSC Code:
12352107
EC Index Number:
222-639-6
NACRES:
NA.21

Quality Level

200

form

solid

potency

>5000 mg/kg LD50, oral (Rat)

loss

≤10% loss on drying, 110°C

pH

9.5 (20 °C, 10 g/L in H2O)

solubility

20 g/L

bulk density

540 kg/m3

λmax

634-644 nm (buffer pH 10.0)

storage temp.

15-25°C

InChI

1S/C20H14N2O5S.Na/c23-17-11-18(28(25,26)27)14-7-3-4-8-15(14)19(17)22-21-16-10-9-12-5-1-2-6-13(12)20(16)24;/h1-11,21,24H,(H,25,26,27);/q;+1/p-1/b22-19-;

InChI key

YRFCCVCSEVISHI-GXTSIBQPSA-M

Related Categories

Application


  • New palladium-oxazoline complexes: Synthesis and evaluation of the optical properties and the catalytic power during the oxidation of textile dyes.: This study examines new palladium-oxazoline complexes, focusing on their synthesis and evaluation of their optical properties and catalytic power in the oxidation of textile dyes, including Eriochrome Blue-Black B (Hassani et al., 2015).

  • Wet air and catalytic wet air oxidation of several azodyes from wastewaters: the beneficial role of catalysis.: This research explores the application of wet air and catalytic wet air oxidation processes to degrade various azo dyes in wastewaters, highlighting the positive impact of catalysis in enhancing degradation efficiency, potentially applicable to Eriochrome Blue-Black B (Rodríguez et al., 2009).

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Absorption maximum λmax. (buffer pH 10.0): 634 - 644 nm
Spec. Absorptivity A 1%/1cm (λmax; 0.025 g/l; buffer pH 10.0; calculated on anhydrous substance): 220 - 320
Loss on drying (110 °C): ≤ 10 %
Suitability as indicator (for metal titration): passes test

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H319

Hazard Classifications

Eye Irrit. 2

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

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