Dimethylsulfonazo III

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CATAPB14979114
CAS14979-11-4
MDL NumberMFCD00151118
Synonyms2,7-Bis[(4-methyl-2-sulfophenyl)azo]-1,8-dihydroxynaphthalene-3,6-disulfonic Acid; 2,7-Bis(2-sulfo-p-tolylazo)-1,8-dihydroxy-3,6-naphthalenedisulfonic Acid
Molecular Weight716.68
Molecular FormulaC24H20N4O14S4
DescriptionSpectrophotometric reagent for alkaline earth metals and indicator for the precipitation titration of SO4 with Ba
AppearanceYellow to dark green to black powder to crystal
Reaxys Registry Number7068179
SensitivityTurn purplish blue with barium perchlorate aq. and turn purple by adding potassium sulfate aq.
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