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Sodium Bisulphite
Sodium Bisulphite (Product Code: SCL-953/219), also known as sodium hydrogen sulphite, is a reducing salt used to test for aldehydes and methyl ketones through crystalline addition compounds in organic chemistry laboratories. College and school labs also use it to decolourise iodine and clear permanganate stains; the 500 gm pack is analytical reagent grade with an MSDS. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India, a laboratory chemicals supplier in India serving teaching and testing labs.
Specifications
| Parameter | Detail |
|---|---|
| Product | Sodium Bisulphite (sodium hydrogen sulphite) |
| Pack size | 500 gm |
| Grade | Analytical reagent |
| Safety data | MSDS supplied with the product |
| 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 | SCL-953/219 |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Is Sodium Bisulphite Used For?
For the bisulphite test, students prepare a freshly saturated solution of the salt in water, add a few drops of the carbonyl compound and shake well; aldehydes such as benzaldehyde and methyl ketones such as acetone form a white crystalline addition product, often after cooling the tube in cold water. The test complements the DNP (dinitrophenylhydrazine) test, which detects the carbonyl group in general, and the Tollens and Fehling tests, which pick out aldehydes. At college level, the same addition reaction is used to separate an aldehyde from a mixture and recover it later by warming with dilute acid or alkali.
As a reducing agent, a dilute sodium bisulphite solution decolourises iodine, removes excess chlorine from water samples, and clears brown manganese dioxide stains from glassware after permanganate titrations. Solutions lose strength on standing, so make them up fresh. Contact with acids releases sulphur dioxide, so work in a ventilated area and keep acids apart on the shelf. It belongs with the carbonyl reagents in any organised set of school chemistry lab equipment in India.
Supplier
Sodium Bisulphite is supplied by Jain Scientific Equipments Private Limited, which does business as ScienceLab from Ambala, Haryana, India, and sends reagents to teaching and testing laboratories in India and international markets. Buyers completing vendor or import paperwork can record the supplying company's Importer-Exporter Code AAECJ8618A (DGFT) and GSTIN 06AAECJ8618A1ZT. The company profile page gives further background.
Related Chemistry Lab Products
Reagents and test compounds used alongside sodium bisulphite in carbonyl chemistry:
- Benzaldehyde — an aldehyde that gives a clear positive bisulphite result.
- Acetone — a methyl ketone that also forms the addition compound.
- 2,4-DNP — the general test reagent for the carbonyl group.
- Tollens Reagent — distinguishes aldehydes from ketones by the silver mirror.
- Fehling A Solution — part of the Fehling pair for a further aldehyde test.
Browse all reagents in the Chemistry Lab category.
Frequently Asked Questions
Who supplies Sodium Bisulphite SCL-953/219?
Sodium Bisulphite (SCL-953/219) is supplied by Jain Scientific Equipments Pvt Ltd, trading as ScienceLab, Ambala, Haryana, India. The company sources this analytical reagent in 500 gm packs with an MSDS; its IEC and GSTIN for vendor records are listed in the Supplier section above.
Which compounds give a positive Sodium Bisulphite test?
Most aldehydes and methyl ketones, such as benzaldehyde and acetone, give a white crystalline addition product with saturated Sodium Bisulphite solution. Bulky ketones react poorly, so a negative bisulphite result does not rule out every carbonyl compound in an unknown sample.
Why must Sodium Bisulphite solution be freshly prepared?
Sodium Bisulphite solutions are slowly oxidised by air and lose sulphur dioxide on standing, which weakens the addition test. Prepare the saturated solution on the day of the practical and discard what is left rather than storing it for the next class.
How much Sodium Bisulphite does one pack contain?
Each pack contains 500 gm of solid Sodium Bisulphite of analytical reagent grade. Because the carbonyl test uses only a few millilitres of saturated solution per group, a single pack serves many practical sessions in a school or college laboratory.
What is the shelf life of Sodium Bisulphite?
Shelf life depends on the chemical, its grade and storage conditions; ask us for the expiry date of the batch you are quoted. Keep Sodium Bisulphite in a tightly closed container, dry and away from acids and oxidising agents; the MSDS supplied gives full storage advice.
Can Sodium Bisulphite remove permanganate stains from glassware?
Yes. A dilute, slightly acidified Sodium Bisulphite solution reduces the brown manganese dioxide deposits left after permanganate titrations so they can be rinsed away. Rinse the glassware thoroughly with water afterwards and work in a ventilated area, as some sulphur dioxide is released.
Request a Quote
To obtain a quotation for Sodium Bisulphite (SCL-953/219), send the quantity and delivery details on the contact page, or place it in the enquiry cart with the other carbonyl-test reagents.
Last updated: 24 September 2026
