Fehling B Solution Manufacturer,Supplier and Exporter in India
Product Code : EL-CL-12290
Jlab Export is a leading Fehling B Solution Manufacturer,and suppliers in India
Fehling B Solution (code EL-CL-12290) is alkaline sodium potassium tartrate, Rochelle salt dissolved in sodium hydroxide solution, and it is the half of Fehling’s reagent that provides the alkali and keeps the copper dissolved. A 500 ml bottle of analytical reagent is sent with its MSDS. JLab manufactures it in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Model No. | JL843/165 |
| Pack size | 500 ml |
| Grade | Analytical reagent |
| Documentation | MSDS included |
| Quality check | Each bottle is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 3–5 working days |
| Product code | EL-CL-12290 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What the Tartrate Does
When B meets an equal volume of Fehling A, tartrate ions bind the copper(II) ions as a deep blue complex. Without them, the sodium hydroxide would throw down pale blue copper(II) hydroxide at once. Heated with an aliphatic aldehyde or a reducing sugar, the fresh mixture gives a brick-red precipitate of copper(I) oxide.
Why Fructose Also Reacts
Fructose is a ketose, yet it passes the test, because hot alkali converts it through an enediol into isomers that reduce copper(II). Sucrose shows no change until it has been boiled with dilute acid and neutralised.
Related Fehling Test Items
- Fehling A Solution — copper(II) sulphate half that B is mixed with.
- Fehling Sol B (Test Of Sucrose) — the same tartrate half, held in the biology reagent range.
- Fructose — ketose sugar that still gives the brick-red result.
More reagents are listed under Chemistry Lab.
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Last updated: 29 October 2026
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