Puneet Varma

Acid orange 5

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Formula  NaC18H14SN3O3
Molar mass  375.38 g/mol
Acid orange 5 httpsuploadwikimediaorgwikipediacommonsthu

Acid orange 5 is a compound with formula Na(C6H5NHC6H4N=NC6H4SO3). It is an azo dye. It is also used as a pH indicator; it is red in pH under 1.4, orange-yellow in pH over 3.2.

References

Acid orange 5 Wikipedia