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Solution Fehling B
Solution Fehling B (Product Code: SCL376/088) is the colourless alkaline tartrate half of Fehling’s reagent, mixed with Fehling A to detect reducing sugars and aldehydes in school, college and food-science laboratories. It is supplied in a 250 ml bottle of analytical reagent grade with an MSDS, matching the bottle size of its partner solution. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India, together with other school biology lab equipment.
Specifications
| Parameter | Detail |
|---|---|
| Capacity | 250 ml |
| Grade | Analytical reagent |
| MSDS | Supplied with the bottle |
| 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 | SCL376/088 |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Is Fehling Solution B Used For?
Fehling B conventionally contains potassium sodium tartrate (Rochelle salt) in sodium hydroxide solution. When it is mixed with the copper sulfate of Fehling A, the tartrate holds the copper in a soluble deep-blue complex instead of letting it fall out as copper hydroxide, and the alkali provides the conditions for a sugar to reduce it. Students can then compare glucose, fruit juice, honey, milk or a sucrose solution by watching which ones form a brick-red precipitate on heating.
Because it is strongly alkaline, Fehling B is corrosive to skin and eyes, so it should be dispensed by staff or under close supervision, with goggles and gloves. Alkaline solutions can make glass stoppers stick, so keep it in a bottle with a suitable plastic or rubber closure and store it upright in the chemistry reagent cabinet, away from acids.
Supplier
Solution Fehling B is a sourced reagent. ScienceLab, the trading name of Jain Scientific Equipments Private Limited in Ambala, Haryana, supplies it with its MSDS and can combine it with Fehling A, test sugars and heating apparatus in a single quotation. Find out more about us on the company profile page.
Related Laboratory Equipment
To run a class set of Fehling tests with Solution Fehling B, add:
- Solution Fehling A — the copper sulfate half, mixed with Fehling B just before use.
- Test Tube Racks — hold a row of food samples side by side.
- Glass Spirit Lamp — heats a beaker water bath where there is no gas supply.
- Sucrose — a non-reducing sugar for the negative control.
- Measuring Cylinder 25 ml — measures matching volumes of A and B.
Browse more reagents in our Laboratory Equipment category and the Chemistry Lab range.
Frequently Asked Questions
What does Solution Fehling B contain?
Solution Fehling B (SCL376/088) is conventionally an alkaline solution of potassium sodium tartrate (Rochelle salt) with sodium hydroxide. The details of each batch are on its label and MSDS; contact us if your method calls for a particular preparation.
How is Solution Fehling B used?
Solution Fehling B is mixed with an equal volume of Fehling A just before testing, added to the sample and heated in a boiling water bath. A brick-red precipitate shows a reducing sugar or aldehyde, and the mixture stays blue if none is present.
Is Solution Fehling B hazardous?
Yes, Solution Fehling B is strongly alkaline and can burn skin and eyes. Wear goggles and gloves, keep it away from acids, and follow the MSDS supplied with every bottle for first aid, spill clean-up and disposal.
What pack size is Solution Fehling B?
Solution Fehling B comes in a 250 ml bottle of analytical reagent grade, the same volume as the listed Fehling A, which makes it simple to order matched pairs for every lab or practical group.
How long does Solution Fehling B last?
How long Solution Fehling B lasts depends on the chemical, its grade and storage conditions, so a fixed period is not quoted. Ask us for the expiry date of the batch you are quoted, and keep the bottle tightly closed between uses.
Who is the supplier of Solution Fehling B?
Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, Haryana, India, supplies Solution Fehling B. It sources the reagent and supplies it with test tubes, racks and heating apparatus to schools, colleges, dealers and importers in India and international markets.
Request a Quote
For pricing on Solution Fehling B, reach us through the contact page or add it to the enquiry cart with Fehling A and your test sugars. Please list bottle quantities and the delivery address.
Last updated: 24 September 2026
