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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

Empirical Formula (Hill Notation):
C12H9N2O5SNa
CAS Number:
547-57-9
Molecular Weight:
316.27
UNSPSC Code:
41116105
NACRES:
NA.21
MDL number:
MFCD00007499
Colour Index Number:
14270
Beilstein/REAXYS Number:
4173410
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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)

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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This Item
69143HT904HT90432
Tropaeolin O sodium salt indicator grade

Supelco

44565

Tropaeolin O sodium salt

Orange II sodium salt analytical standard

Supelco

69143

Orange II sodium salt

Safranin O Solution

Sigma-Aldrich

HT904

Safranin O Solution

Safranin O solution

Sigma-Aldrich

HT90432

Safranin O solution

description

indicator grade

description

analytical standard

description

-

description

-

technique(s)

titration: suitable, UV/Vis spectroscopy: suitable

technique(s)

HPLC: suitable, gas chromatography (GC): suitable

technique(s)

-

technique(s)

-

grade

indicator grade

grade

analytical standard

grade

-

grade

-

composition

sulfated ash, 40-60%

composition

-

composition

-

composition

-

loss

≤13.0% loss on drying

loss

-

loss

-

loss

-

pH

11-13

pH

-

pH

8.5

pH

8.5

λmax

≥500 at 1% in 0.1 M NaOH (1 cm)

λmax

-

λmax

-

λmax

-

Storage Class

11 - Combustible Solids

WGK

WGK 3

Flash Point (°F)

Not applicable

Flash Point (°C)

Not applicable

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