- Physics Lab Equipment
- Chemistry Lab Equipment
- Biology Lab Equipment
- Anatomical Lab Equipment
- Learning
- Educational Lab Equipment
- Magnets
- Agriculture
- Astronomy
- Earth Science
- Geography Lab Equipment
- Safety Lab Coat
- Laboratory
- Meteorological
- Electricity & Magnetism
- Heat
- School Lab Equipment
- Lab Glassware
- Science Lab Equipment
- Tvet Lab Equipment
- Robotics Kits Supplier and Manufacturer for Schools India
- Math Lab Equipment Manufacturers and Exporters in Ambala
- STEM Kits Manufacturers and Supplier India
- Engineering Lab Equipment
- Hospital Lab Equipment
- Water, Sanitation & Hygiene Supplies
- Cold Chain, Solar & Communication Equipment
- Nutrition
Sulfanilic Acid
Sulfanilic Acid (Product Code: SCI-453/191) is an analytical reagent grade aromatic sulfonic acid used to make azo dyes and to test for nitrite in college organic and analytical chemistry practicals. Lecturers use it as the starting amine in diazotisation experiments, and this listing is a 50 g pack supplied with an MSDS. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India, a lab chemicals supplier in India for colleges, universities and schools.
Specifications
| Parameter | Detail |
|---|---|
| Grade | Analytical reagent |
| Pack size | 50 g |
| Documentation | Supplied with MSDS |
| 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. |
| Product code | SCI-453/191 |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Is Sulfanilic Acid Used For?
Sulfanilic acid is the classic starting material for dye synthesis in the teaching lab. Students treat it with sodium nitrite and hydrochloric acid in an ice bath to form a diazonium salt, then couple that salt with an aromatic amine or phenol to produce a brightly coloured azo compound — the same route used to prepare the indicator methyl orange. The practical teaches electrophilic substitution, temperature control and product isolation by vacuum filtration.
In water and soil analysis, sulfanilic acid is one of the reagents in colour tests for nitrite, where the depth of the pink-red azo colour shows how much nitrite is present. Keep diazotisation mixtures cold, because diazonium salts decompose on warming, and wear goggles and gloves when weighing the solid. Ordering it from the same chemistry consumables supplier as the nitrite, acid and glassware keeps the whole practical on one enquiry.
Supplier
Sulfanilic Acid is sourced and supplied by Jain Scientific Equipments Private Limited, the company behind the ScienceLab name, for college, university and school laboratories in India and international markets. Organic chemistry departments can request one quotation covering the amine, the diazotising reagents and the glassware for a dye-making practical, and each chemical is dispatched with its MSDS.
Company details are on the ScienceLab profile.
Related Laboratory Equipment
Reagents and apparatus used with sulfanilic acid in an azo dye practical:
- Sodium Nitrite — the diazotising reagent.
- Hydrochloric Acid — supplies the acid needed to form the diazonium salt.
- Metiloranzh (Indicator) — methyl orange, the azo indicator students can compare with their own product.
- Aniline — the parent amine from which sulfanilic acid is made by sulfonation.
- Vacuum Filter Hopper (Buhner Hopper) — a porcelain vacuum funnel for collecting the dye crystals.
Explore more in Laboratory Equipment.
Frequently Asked Questions
What grade and pack size is Sulfanilic Acid SCI-453/191?
Sulfanilic Acid SCI-453/191 is listed as analytical reagent grade in a 50 g pack and is supplied with an MSDS. For assay or batch analysis details beyond the grade, ask us before ordering and we will share what the batch documentation states.
What is Sulfanilic Acid used for in teaching labs?
Sulfanilic Acid is mainly used to make azo dyes such as methyl orange through diazotisation and coupling, and as a reagent in colour tests for nitrite ions. It suits college organic and analytical chemistry practicals carried out under supervision.
What else do I need for a Sulfanilic Acid dye practical?
An azo dye practical with Sulfanilic Acid usually also needs sodium nitrite, hydrochloric acid, a coupling partner, an ice bath, beakers and a vacuum filter funnel. List them all in one enquiry so they can be quoted together.
What is the shelf life of Sulfanilic Acid?
Shelf life depends on the chemical, its grade and storage conditions, so no fixed period applies to Sulfanilic Acid. Ask us for the expiry date of the batch you are quoted, and store the pack closed, dry and out of direct light.
Who supplies Sulfanilic Acid?
Sulfanilic Acid is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, Haryana, India, which sources laboratory reagents, glassware and apparatus for schools, colleges and institutions in India and international markets.
How do I request a Sulfanilic Acid quotation?
To get a Sulfanilic Acid quotation, send the product code SCI-453/191, the number of 50 g packs and your delivery location through the contact page. Add any other reagents for the same practical so they can be priced together.
Request a Quote
Use the contact page to ask for a Sulfanilic Acid quotation, or place it in the enquiry cart alongside the other items for your dye practical.
Last updated: 24 September 2026
