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Fehling B Solution
Fehling B Solution (Product Code: SCL-843/165) is the colourless, alkaline tartrate half of Fehling’s reagent, used with Fehling A to test for reducing sugars and aliphatic aldehydes in school, college and food-testing laboratories. It provides the alkaline conditions and the tartrate that keeps copper in solution, and is packed as a 500 ml analytical reagent with an MSDS. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India, a lab consumables supplier in India.
Specifications
| Parameter | Detail |
|---|---|
| Product code | SCL-843/165 |
| Reagent | Fehling’s solution B (alkaline tartrate component) |
| Grade | Analytical reagent |
| Quantity | 500 ml |
| Safety document | MSDS included |
| Partner reagent | Fehling A Solution (separate 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. |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Is Fehling B Solution Used For?
Without the tartrate in solution B, copper(II) ions would simply precipitate as copper hydroxide in alkali; instead they form a soluble deep blue complex that is ready to be reduced. When a sugar solution such as fructose or glucose is heated with the mixed reagent, a red precipitate forms, while sucrose stays blue unless it has first been hydrolysed with acid. Food and nutrition laboratories also use the paired Fehling solutions in the Lane-Eynon titration to estimate reducing sugars, a method that often appears in a food-science volumetric analysis kit.
Being strongly alkaline, solution B can burn skin and damage eyes, so wear gloves and goggles while dispensing. Alkaline solutions tend to seize ground-glass stoppers, so a bottle with a plastic or rubber closure is more practical for bench use, and the cap should be kept tight so the solution does not absorb carbon dioxide from the air.
Supplier
Fehling B Solution is supplied by Jain Scientific Equipments Private Limited, which trades as ScienceLab from Ambala, Haryana. The company sources prepared reagents for educational and testing laboratories in India and international markets. For institutional and tender buyers who need vendor registration details, the supplying company’s GSTIN is 06AAECJ8618A1ZT and its LEI is 3358004HRD1JIVXKYX49. The company profile has more information.
Related Chemistry Lab Products
Items that complete a Fehling’s test session:
- Fehling A Solution — the copper half, mixed with solution B in equal volumes.
- Fructose — a reducing sugar that gives a clear positive result.
- Sucrose — a non-reducing sugar for the negative control.
- Hand Gloves — hand protection when handling the alkaline solution.
- Reagent Bottles For Liquids — for decanting a bench supply from the stock pack.
Explore the Chemistry Lab category for further reagents.
Frequently Asked Questions
Does the Fehling B Solution pack contain both Fehling solutions?
No. The Fehling B Solution pack contains 500 ml of solution B only. Fehling A Solution, the copper half, is listed separately, and both are needed for the reducing-sugar and aldehyde tests, so order the two together.
What is the role of Fehling B Solution in the test?
Fehling B Solution provides the alkaline medium and the tartrate that holds copper(II) ions in solution. Without it, copper would precipitate as hydroxide; with it, a reducing sample can convert the copper to red copper(I) oxide.
Is Fehling B Solution dangerous to handle?
Fehling B Solution is corrosive because it is strongly alkaline, so it can burn skin and damage eyes. Wear gloves and eye protection when dispensing it, and follow the MSDS supplied with the pack for first aid and spill clean-up.
What is the shelf life of Fehling B Solution?
The shelf life of Fehling B Solution depends on the chemical, its grade and storage conditions, so we do not quote a fixed period. Ask us for the expiry date of the batch you are quoted, and keep the container closed to limit carbon dioxide uptake.
Who supplies Fehling B Solution (SCL-843/165)?
Fehling B Solution (SCL-843/165) is supplied by Jain Scientific Equipments Pvt Ltd, trading as ScienceLab, Ambala, Haryana, India. The company provides prepared reagents and laboratory consumables to schools, colleges and food-testing laboratories in India and international markets.
Do you accept Fehling B Solution orders from several institutions at once?
Yes. Consolidated orders of Fehling B Solution for schools and colleges in India and international markets can be quoted with separate delivery points. List the number of bottles of each Fehling half and every delivery address in one enquiry via the contact page.
Request a Quote
Place Fehling B Solution and Fehling A Solution in the enquiry cart, or send your quantities and delivery location via the contact page.
Last updated: 24 September 2026
