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1.04594

Calcon (C.I.15705)

Name: Calcon (C.I.15705)
Brand: MM

metal indicator

Synonym(s):

Calcon (C.I.15705), 2-Hydroxy-1-(2-hydroxy-1-naphthylazo)naphthalene-4-sulfonic acid sodium salt

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About This Item

Empirical Formula (Hill Notation):

C₂₀H₁₃N₂NaO₅S

CAS Number:

2538-85-4

Molecular Weight:

416.38

MDL number:

MFCD00004069

UNSPSC Code:

12352107

EC Index Number:

219-810-2

NACRES:

NA.21

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Properties

Product Name

Calcon (C.I.15705), metal indicator

Quality Level

200

form

solid

loss

≤10% loss on drying, 110°C

pH

9.4 (25 °C, 10 g/L in H₂O)

solubility

20 g/L

bulk density

530 kg/m³

λ_max

634-640 nm (buffer pH 12.2)

storage temp.

2-30°C

SMILES string

[Na+].[S](=O)(=O)([O-])C1=CC(=O)\C(=N\Nc3c4c(ccc3O)cccc4)\c2c1cccc2

InChI

1S/C20H14N2O5S.Na/c23-16-10-9-12-5-1-2-6-13(12)19(16)21-22-20-15-8-4-3-7-14(15)18(11-17(20)24)28(25,26)27;/h1-11,21,23H,(H,25,26,27);/q;+1/p-1/b22-20+;

InChI key

YJUGDMOGPJJWDG-QPNALZDCSA-M

Description

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Absorption maximum λ_max. (buffer pH 12.2): 634 - 640 nm
Spec. Absorptivity A 1%/1cm (λ_max; 0.015 g/l; buffer pH 12.2; calculated on dried substance): 250 - 400
Loss on drying (110 °C): ≤ 10 %
Suitability as indicator (for metal titration): passes test

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c