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4442-11-9

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4442-11-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4442-11-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,4,4 and 2 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 4442-11:
(6*4)+(5*4)+(4*4)+(3*2)+(2*1)+(1*1)=69
69 % 10 = 9
So 4442-11-9 is a valid CAS Registry Number.

4442-11-9Relevant articles and documents

BESTIMMUNG DER IONENPAAR-BASIZITAT VON LITHIUM- UND KALIUMAMIDEN

Ahlbrecht, Hubertus,Schneider, Gunther

, p. 4729 - 4742 (2007/10/02)

Ion pair basicities of lithio and potassio salts of some secondary amines were determined by equilibration with benzyl compounds.With these bases it is possible to span a range of about 19 pK-units from pK = 27 up to 46.The structural dependence of thermodynamic as well as kinetic basicity is discussed.Some new effective amide bases for preparative purposes are recommended.For the first time the pK-value of toluene has been determined by direct equilibration.It amounts to 40.7 in tetrahydrofuran.

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