Please Note: We are not able to ship this product to Northern Ireland.

Methyl Orange C.I.13025

Price: £5.45
Stock Availability:

Compare all Pack Sizes

Stock Availability
On Shelf - Approx. UK delivery date: Thursday the 05th February 2026*
In bulk stock - ships within 10 - 12 Working Days (Excluding weekends and public holidays)
4 to 6 weeks approx. (Not guaranteed)
UK Shipping

Unfortunately, we are not currently accepting orders for Northern Ireland, Jersey and Guernsey.

We can only ship to the following postcodes where a Royal Mail postal option has been chosen at checkout.

AB, DD, DG3, DG4, DG6 - DG9, EH, FK, G, HS, IM, IV, KA, KW, KY, ML, PA, PH, PO30 - PO41, TD, TR21 - TR25, ZE

* We will always try to ship as early as possible. Delivery could be much quicker than stated but is not guaranteed
  • Indicator
  • Biological Dye

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.

  • 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%

Packing Group: 3

Hazard Phrases: Toxic if swallowed.

Prec Phrases: 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
UN3143

Information

Returns Policy

Cookie Policy

Privacy Policy

Shipping

Contact Us

Payment Methods

We can also accept a bank transfer (UK Only)

Popular Products

> Hydrogen Peroxide 3% Food Grade
> Hydrogen Peroxide 6% Food Grade
> Surgical Spirit BP
> Distilled Water
> Ammonium Chloride 99.5%
> Potassium Chloride 99-100.5% ACS,FG,FCC
> Isopropanol 70% Blend
> Magnesium Hydroxide 99%
> Isopropyl Alcohol 99.9% ACS
> Aluminium Potassium Sulphate 99.5% ACS
> Lactic Acid 80% ACS,FCC
> Hydrogen Peroxide 12% Food Grade
> Benzyl Alcohol 99.9% USP,Ph Eur,BP,ACS
> Potassium Iodide 99.9% ACS
> Hydrogen Peroxide 9% Food Grade
> Ethyl Acetate 99.7% ACS
> Castor Oil BP
> Sodium Metabisulphite 97-100.5% BP
> Oxalic Acid 5% Solution
> Methanol 99.85% ACS
Source Chemicals Ltd