44565
Tropaeolin O sodium salt
indicator grade
Synonym(s):
4-([2,4-Dihydroxyphenyl]azo)benzenesulfonic acid sodium salt, Acid Orange 6, Chrysoin, Resorcinol yellow
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About This Item
SMILES string
[Na+].Oc1ccc(\N=N\c2ccc(cc2)S([O-])(=O)=O)c(O)c1
InChI key
COEZWFYORILMOM-IERUDJENSA-M
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+;
grade
indicator grade
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)
Related Categories
Storage Class
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
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