Methyl orange
CAS NO.: 547-58-0
Synonyms: P-Dimethylaminoazobenzenesul fonic acid sodium salt, Orange III.
Molecular formula: C14H14N3NaO3S
Molecular weight: 327.33
Property: Orange chip crystal or crystalline powder. one of azo pigment. soluble in hot water, hard soluble in cool water, ethanol and ether. heated and resolution.
Use: acid-base indicator. volume mode tests stannum.
Range of PH: 3.0 (red)-4.4 (yellow)
Sensitivity test : passed
Solubility test in water: passed
Residue on ignition(sulfate): 18.5-22.0%
Oxide: passed
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