36018

Fehling′s reagent I for sugars

reag. Ph. Eur., for determination of sugar, solution I: copper(II) sulfate

• Sinônimo(s): Copper(II) sulfate solution, Cupric sulfate solution acc. to Fehling, Cupric sulfate standard
• Número CAS: 7758-99-8
• Número MDL: MFCD00010981
• Código UNSPSC: 12164500
• ID de substância PubChem: 329755253
• NACRES: NA.21

Propriedades

• grau: for determination of sugar
• Nível de qualidade: 100
• Agency: USP/NF; reag. Ph. Eur.
• concentração: 17.6 g/L±0.1 g/L Cu
• densidade: 1.038-1.060 g/mL at 20 °C
• adequação: in accordance for application
• aplicação(ões): food and beverages; general analytical; pharmaceutical (small molecule)
• cadeia de caracteres SMILES: [Cu++].[O-]S([O-])(=O)=O
• InChI: 1S/Cu.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
• chave InChI: ARUVKPQLZAKDPS-UHFFFAOYSA-L

Descrição

Descrição geral

The principle behind Fehling′ test is basically based on the reducing property of monosaccharide and disaccharides, which in turn depends on the presence of free keto or an aldehyde group. This test is performed by adding a few drops of sugar solution to a mixture of Fehling′s A solution (i.e., CuSO₄) and Fehling′s B solution (i.e., KOH and Na-K tartarate). Fehling′s solution gets reduced by aldose sugars to insoluble yellow or red colored cuprous oxide. Monosaccharides like glucose, galactose and fructose and disaccharides like lactose and maltose resond freely to Fehling′s test as they possess a free keto or an aldehyde group, whereas sucrose fails to answer the test as it does not possess a free aldehyde or an keto group. Hence, Fehling′s test is also used to distinguish reducing discaccharides like maltose from non-reducing sugars like sucrose.

Informações de segurança

• Pictogramas: GHS09
• Palavra indicadora: Warning
• Frases de perigo: H410
• Declarações de precaução: P273 - P391 - P501
• Classificações de perigo: Aquatic Acute 1 - Aquatic Chronic 2
• Código de classe de armazenamento: 12 - Non Combustible Liquids
• Classe de risco de água (WGK): WGK 3
• Ponto de fulgor (°F): Not applicable
• Ponto de fulgor (°C): Not applicable