Skip to Content
Merck
All Photos(1)

Key Documents

1.04594

Supelco

Calcon (C.I.15705)

metal indicator

Synonym(s):

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

Sign Into View Organizational & Contract Pricing
All Photos(1)

About This Item

Empirical Formula (Hill Notation):
C20H13N2NaO5S
CAS Number:
2538-85-4
Molecular Weight:
416.38
UNSPSC Code:
12352107
EC Index Number:
219-810-2
NACRES:
NA.21

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

λmax

634-640 nm (buffer pH 12.2)

storage temp.

2-30°C

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

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Absorption maximum λmax. (buffer pH 12.2): 634 - 640 nm
Spec. Absorptivity A 1%/1cm (λmax; 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 Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service