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Tropaeolin O
(CAS RN:547-57-9 Product Number:R0010)


Tropaeolin O
Synonym Acid Orange 6
Synonym 2,4-Dihydroxyazobenzene-4'-sulfonic Acid Sodium Salt
Synonym Resorcinol Yellow
Synonym Sodium 2,4-Dihydroxyazobenzene-4'-sulfonate

General Information

Product Number R0010

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Purity/Analysis Method
Storage Temperature
M.F. / M.W. C12H9N2NaO5S=316.26
CAS RN 547-57-9
Related CAS RN
MDL Number MFCD00007499
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Appearance Orange to Brown powder to crystal
Absorbance min. 0.470(5mg/L, pH 10.6 buffer sol., 428.0 to 432.0 nm)(calcd.on dried substance)
Drying loss max. 15.0 %
Ignition residue(Sulfate) 15.0 to 40.0 %(after drying)
Transition interval(pH) (yellow)11.0 ~ 12.8(yellowish orange)


Colour Index 14270
Beilstein 16,275
Reaxys-RN 8242652
PubChem SID 87575592
Merck Index(14) 9775
RTECS# DB6145180
EC Number 208-924-8

Transport Information

HS Number 2927000090


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