| Fehlings Solution B | |
| Synonyms | Fehling’s reagent II for sugars, Potassium sodium tartrate solution, alkaline |
| Categories | Laboratory chemicals, Diagnostic reagents & clinical reagents |
| Appearance (Form) | Liquid |
| HSN Code | 38229090 |
| Pack Size | 500 ML | 5 LT | 25 LT |
Mix with Fehling’s Solutions No.1 is equal volumes before use. Fehling’s solution prepared in accordance with a specification approved by the British Sugar Corporation for the determination of invert sugar.
Fehlings solution B - used to distinguish aldehyde vs ketone functional groups. The compound to be tested is added to the Fehling's solution and the mixture is heated. Aldehydes are oxidized, giving a positive result, but ketones do not react, unless they are alpha-hydroxy-ketones. The bistartratocuprate(II) complex oxidizes the aldehyde to a carboxylate anion, and in the process the copper(II) ions of the complex are reduced to copper(I) ions.
- Un No. 8/1824 TARIFF : 3822 00 90
- R : 34 S : 26-36/37/39-45