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

Supplier: VWR Chemicals
Ratings: (No Reviews)

Total Ratings: 0
Avg. Ratings: 0.0 out of 5

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Synonyms: 4-((4-(Dimethylamino)phenyl)diazenyl)benzenesulphonic acid, sodium saltMethyl orange sodium saltHelianthine

86151.180EA 27156 INR
86151.180 86151.150
Methyl orange (C.I. 13025), AnalaR NORMAPUR® ACS, Reag. Ph. Eur. indicator
Methyl orange
Formula: C₁₄H₁₄N₃NaO₃S
MW: 327,34 g/mol
Boiling Pt: ~ 90 °C (1013 hPa)
Melting Pt: Min. 300 °C
Density: ~ 1 g/cm³ (20 °C)
Flash Pt: 38 °C
Storage Temperature: ambient
MDL Number: MFCD00007502
CAS Number: 547-58-0
EINECS: 208-925-3
ADR: 6.1,III
Merck Index: 13,06127

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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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