Methyl Orange

Product Code : SCL-LC-12289

Methyl Orange (SKU SCL-LC-12289) is an azo-dye acid-base indicator that is red in acidic conditions and changes toward yellow-orange above a transition range of about pH 3.1–4.4. Chemistry teachers and technicians use it to detect titration endpoints, demonstrate pH ranges and compare indicators. Science Lab Supplies supplies it from Ambala, India, to schools, colleges, training institutes, tender contractors and distributors as part of its school chemistry lab equipment in India.

Specifications

The product is methyl orange sodium salt, C14H14N3NaO3S. It may be supplied as a solid indicator or as a ready solution, so the label on each batch confirms the form, strength and any solvent. Grade and pack size are stated on the quotation before dispatch.

Applications and Experiments for Methyl Orange

Because its colour changes in the acidic region, the indicator is chosen for titrations of strong acids against weak bases such as carbonates. A ready solution is added drop by drop as the method specifies; a solid is dissolved by trained staff to a written procedure. Observe endpoints in good light.

• NCERT Class 10 science, Chapter 2: methyl orange as a synthetic acid-base indicator.
• CBSE Class 11 practicals: titrating sodium carbonate against hydrochloric acid with methyl orange.
• B.Sc. volumetric analysis: strong acid versus weak base titrations.
• Indicator comparison with phenolphthalein and litmus in introductory lessons.

Standard Scope of Supply

The supply is one pack or bottle of Methyl Orange with a batch label, the Safety Data Sheet and transport documents. Shelf life depends on the chemical, its grade and storage conditions; ask us for the expiry date of the batch you are quoted. The quotation states form and pack size.

Packing, MOQ and Lead Time

Request pricing for a single container or a full laboratory stock; the quotation will set out packing, delivery time and price for that quantity. Tell us whether you need solid or solution form, and add other indicators or glassware to the same enquiry.

Through its Importer-Exporter Code as a registered exporter, Science Lab Supplies can ship to buyers in Rwanda, South Africa, Qatar, Sri Lanka, Vietnam and Malaysia. Questions can go to the contact page, selections to the enquiry cart, and tender queries to the lab tender page.

Frequently Asked Questions

What colour does Methyl Orange show in acid?
It is red in acidic conditions and changes toward yellow-orange above its transition range of about pH 3.1–4.4. Confirm the exact range for the supplied formulation.

Is it supplied as powder or solution?
Either form may be supplied, and the quotation and label state which one you receive. If you need a ready-to-use solution, say so when you ask for a quote.

Who supplies the Methyl Orange?
Science Lab Supplies supplies this indicator from Ambala, India, with a batch label and Safety Data Sheet, quoted alone or with other titration reagents.

Is Methyl Orange suitable for school labs?
Yes, for supervised school and college titrations. Avoid ingesting it or breathing dust or vapour, and do not use it as a textile dye or for any medical purpose.

Related Indicators and Titration Chemicals

Indicator choice depends on the acid and base in the flask, so labs keep more than one. The four items below from the same Lab Chemicals range pair with methyl orange for indicator comparison and for acid-base titrations, and can go on a single quotation.

• Phenolphthalein Solution Indicator — colourless in acid and pink in alkali, for endpoint comparison.
• Red Litmus Solution — simple red-to-blue test for alkaline samples.
• Ammonium Hydroxide — aqueous ammonia, a weak alkali for pH adjustment lessons.
• Sodium Hydroxide Flakes — strong alkali for neutralisation and titration.

Browse the full Lab Chemicals range or all school lab equipment.

Last updated: 25 September 2026