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About This Item
CAS Number:
NACRES:
NA.21
PubChem Substance ID:
UNSPSC Code:
12164500
MDL number:
InChI
1S/Cu.H2O4S/c;1-5(2,3)4/h;(H2,1,2,3,4)/q+2;/p-2
SMILES string
[Cu++].[O-]S([O-])(=O)=O
InChI key
ARUVKPQLZAKDPS-UHFFFAOYSA-L
agency
USP/NF, reag. Ph. Eur.
concentration
17.6 g/L±0.1 g/L Cu
density
1.038-1.060 g/mL at 20 °C
suitability
in accordance for application
application(s)
food and beverages
general analytical
pharmaceutical (small molecule)
Quality Level
General description
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.
signalword
Warning
hcodes
pcodes
Hazard Classifications
Aquatic Acute 1 - Aquatic Chronic 2
Storage Class
12 - Non Combustible Liquids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
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