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Methyl Orange C.I.13025


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Methyl Orange C.I.13025

C.I. 13025  (Acid orange 52)

Methyl orange is a pH indicator frequently used in titrations because of its clear and distinct colour change. Because it changes colour at the pH of a midstrength acid, it is usually used in titrations for acids. Unlike a universal indicator, methyl orange does not have a full spectrum of colour change, but has a sharper end point.

  • Indicator
  • Biological Dye

C.I. 13025

Minimum Assay: 95%
Molecular Formula: C14H14N3NaO3S
Molecular Weight: 327.34 g/mol
Melting Point: >300 °C
Absorptivity (pH 3.0) 501-504nm: 1050-1150
Absorptivity (pH 4.4) 467-471nm: 750-850
Loss on Drying: <5%

Hazard Class: 6.1

Packing Group: 3

Hazard Phrazes: Toxic if swallowed.

Prec Phrazes: IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. Rinse mouth. Do NOT induce vomiting.

toxic CLP Image

Cas No: 547-58-0
Einecs No: 208-925-3


Methyl Orange C.I.13025
Code Pack Price Qty  
RRBD15464-T 5g £3.99
RRBD15464-W 25g £6.45
RRBD15464-2W 50g £11.50
RRBD15464-X 100g £20.99