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Supelco

Tropaeolin O sodium salt

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Synonym(s):
4-([2,4-Dihydroxyphenyl]azo)benzenesulfonic acid sodium salt, Acid Orange 6, Chrysoin, Resorcinol yellow
Empirical Formula (Hill Notation):
C12H9N2O5SNa
CAS Number:
Molecular Weight:
316.27
Colour Index Number:
14270
Beilstein:
4173410
MDL number:

grade

indicator

composition

sulfated ash, 40-60%

technique(s)

UV/Vis spectroscopy: suitable
titration: suitable

loss

≤13.0% loss on drying

pH

11-13

λmax

488-492 nm in 0.1 M NaOH
≥500 at 1% in 0.1 M NaOH (1 cm)

SMILES string

[Na+].Oc1ccc(\N=N\c2ccc(cc2)S([O-])(=O)=O)c(O)c1

InChI

1S/C12H10N2O5S.Na/c15-9-3-6-11(12(16)7-9)14-13-8-1-4-10(5-2-8)20(17,18)19;/h1-7,15-16H,(H,17,18,19);/q;+1/p-1/b14-13+;

InChI key

COEZWFYORILMOM-IERUDJENSA-M

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Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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