Description

Fehling’s Solution NO. 1 1L L/P

Fehling’s Solution No. 1 is a deep blue colored aqueous solution commonly used in qualitative analysis to test for the presence of reducing sugars (aldoses and some ketoses). It is typically used in conjunction with Fehling’s Solution No. 2.

Components (Specific concentrations may vary depending on the manufacturer):

• Sodium potassium tartrate (Rochelle salt): This serves as a complexing agent, keeping cupric ions (Cu2+) in solution.
• Sodium hydroxide (NaOH): Maintains the solution’s high pH, necessary for the reaction with reducing sugars.
• Copper(II) sulfate (CuSO4): The copper ion (Cu2+) is the key component that reacts with reducing sugars.

L/P Notation:

The “L/P” notation likely refers to the manufacturer or supplier but the specific meaning depends on the company. Without additional information, it’s difficult to pinpoint the exact company.

Applications:

• Qualitative test for reducing sugars: When Fehling’s Solution No. 1 is mixed with Fehling’s Solution No. 2 (containing cupric ions) and heated in the presence of a reducing sugar, a red precipitate of copper(I) oxide (Cu2O) forms. This color change indicates the presence of a reducing sugar.

Safety:

• Mild irritant: Fehling’s Solution may irritate the skin and eyes. Wear gloves and safety glasses when handling it.
• Dispose properly: Follow local regulations for disposal of chemical waste.