Methyl orange (C.I. 13025), AnalaR NORMAPUR® ACS, Reag. Ph. Eur. indicator

Supplier: VWR Chemicals

Synonyms: 4-((4-(Dimethylamino)phenyl)diazenyl)benzenesulphonic acid, sodium salt, Methyl orange sodium salt, Helianthine

86151.150EA 9497 INR
86151.150 86151.180
Methyl orange (C.I. 13025), AnalaR NORMAPUR® ACS, Reag. Ph. Eur. indicator
Methyl orange
Formula: C₁₄H₁₄N₃NaO₃S
MW: 327,34 g/mol
MDL Number: MFCD00007502
CAS Number: 547-58-0

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Specification Test Results

Appearance of solution Passes test
pH range (pink to orange-yellow) 3,2 - 4,4
Visual transition interval Passes test
Absorption maximum I1 (pH 3,1) 501 - 504 nm
Absorption maximum I2 (pH 4,4) 467 - 471 nm
Absorptivity (A1%, 1cm, I1, pH 3,1, on dried sample) 1050 - 1150
Absorptivity (A1%, 1cm, I2, pH 4,4, on dried sample) 750 - 850
Loss on drying (110 ºC) Max. 5%

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