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Diphenyl Amine
Diphenyl Amine (Product Code: SCL-831/159) is an aromatic amine used as a redox indicator in dichromate titrations and as a colour reagent for nitrates and other oxidising agents in chemistry laboratories. College, school and quality-control laboratories buy it as 100 gm of analytical reagent, supplied with an MSDS, and prepare indicator solutions from it as needed. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India, a lab chemicals supplier in India.
Specifications
| Parameter | Detail |
|---|---|
| Product code | SCL-831/159 |
| Chemical name | Diphenylamine |
| Grade | Analytical reagent |
| Pack quantity | 100 gm |
| Safety document | MSDS provided |
| Shelf life | Shelf life depends on the chemical, its grade and storage conditions; ask us for the expiry date of the batch you are quoted. |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Is Diphenyl Amine Used For?
When iron(II) is titrated with potassium dichromate, the end point cannot be seen from the titrant colour alone, so a few drops of diphenylamine indicator solution in sulphuric acid are added to the flask. At the equivalence point, the first slight excess of dichromate oxidises the indicator and the solution turns an intense violet-blue. This titration appears in many undergraduate courses and fits neatly into a volumetric analysis kit alongside Mohr’s salt, dichromate and a burette.
The same compound, dissolved in concentrated sulphuric acid, gives a deep blue colour with nitrates, nitrites and several other oxidising agents, making it a quick spot test in anion analysis and in soil or water investigations. Prepare indicator solutions in small batches, handle the concentrated acid with care, and wear gloves, since diphenylamine is harmful by skin contact and ingestion.
Supplier
Diphenyl Amine is supplied by Jain Scientific Equipments Private Limited, known to customers as ScienceLab, from Ambala, Haryana. The company sources titration indicators and analytical reagents for schools, colleges and industry laboratories in India and international markets. Its export shipments are handled under Importer-Exporter Code AAECJ8618A (DGFT), and buyers completing vendor registration can use its GSTIN 06AAECJ8618A1ZT. Read the company profile for more.
Related Chemistry Lab Products
Chemicals and apparatus used with diphenylamine in redox titrations and nitrate testing:
- Potassium Dichromate — the oxidising titrant whose end point the indicator reveals.
- Ferrous Ammonium sulphate — the iron(II) salt titrated against dichromate.
- Sulphuric Acid Concentrated — solvent for the indicator and the nitrate spot test.
- Potassium Nitrate — a known nitrate for checking the blue colour reaction.
- Burette — delivers the dichromate solution during titration.
Browse more in the Chemistry Lab category.
Frequently Asked Questions
How is Diphenyl Amine supplied?
Diphenyl Amine (SCL-831/159) is supplied as 100 gm of analytical reagent grade diphenylamine per pack, with an MSDS. Laboratories prepare the titration indicator or the nitrate test solution from it, usually in concentrated sulphuric acid, in small batches as needed.
What colour change marks the end point with Diphenyl Amine indicator?
With Diphenyl Amine as indicator, the solution turns an intense violet-blue once potassium dichromate is in slight excess over the iron(II) being titrated. Adding phosphoric acid, as many dichromate procedures specify, makes this colour change sharper and easier to judge.
Can Diphenyl Amine tell nitrate apart from nitrite?
No. Diphenyl Amine in concentrated sulphuric acid gives a blue colour with nitrates, nitrites and several other oxidising agents. Use it as a screening test and confirm the anion with a more specific method, such as the brown ring test for nitrate.
What is the shelf life of Diphenyl Amine?
The shelf life of Diphenyl Amine depends on the chemical, its grade and storage conditions, so no fixed expiry period is given on this page. Ask us for the expiry date of the batch you are quoted, and keep the pack closed, dry and away from light.
Is Diphenyl Amine hazardous to handle?
Diphenyl Amine is harmful by skin contact and if swallowed, so wear gloves when weighing it and take care with the concentrated acid used to dissolve it. The MSDS supplied with the pack gives first-aid and spill instructions for laboratory staff.
Who supplies Diphenyl Amine (SCL-831/159)?
Diphenyl Amine (SCL-831/159) is supplied by Jain Scientific Equipments Pvt Ltd, trading as ScienceLab, Ambala, Haryana, India. The company provides indicators and analytical reagents to schools, colleges and quality-control laboratories, and quotes them with the titration glassware they need.
Do you ship Diphenyl Amine to laboratories abroad?
Yes, Diphenyl Amine can be quoted for institutions in India and international markets. Include the destination country, the number of 100 gm packs and any other titration reagents in your enquiry so that shipping can be planned.
Request a Quote
Request a quotation for Diphenyl Amine via our contact page, or add it to the enquiry cart together with your titration glassware and other reagents.
Last updated: 24 September 2026
