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40520-25-0

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40520-25-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 40520-25-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,5,2 and 0 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 40520-25:
(7*4)+(6*0)+(5*5)+(4*2)+(3*0)+(2*2)+(1*5)=70
70 % 10 = 0
So 40520-25-0 is a valid CAS Registry Number.

40520-25-0Downstream Products

40520-25-0Relevant articles and documents

Chiral separation of drug enantiomers by capillary electrophoresis using succinyl-β-cyclodextrin

Schmid,Wirnsberger,Guebitz

, p. 852 - 854 (2007/10/03)

A capillary electrophoretic method for the enantiomeric separation of 11 drugs was developed using an uncoated fused-silica capillary and succinyl β-cyclodextrin as a chiral additive. The effect of the pH of the background electrolyte on selectivity and resolution was studied in the range pH 3.3-9.3. Best results were obtained in a neutral medium. Generally, the presence of a hydroxy group at the chiral C-atom of the analyte seems to be essential because similar compounds without a hydroxy group at the chiral centre did not show chiral resolution. In addition to the enantioselective inclusion into the chiral cavity, hydrogen bondings and formation of ion pairs between the negatively charged selector and cationic analytes can be assumed as mechanisms.

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