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4057-44-7

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4057-44-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4057-44-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,0,5 and 7 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 4057-44:
(6*4)+(5*0)+(4*5)+(3*7)+(2*4)+(1*4)=77
77 % 10 = 7
So 4057-44-7 is a valid CAS Registry Number.

4057-44-7Relevant articles and documents

Kinetics and products of reactions of pyridine N-oxides with alkyl halides

Popov,Matveev,Koblik,Savelova,Matvienko

, p. 587 - 590 (2007/10/03)

The kinetics of formation of alkoxypyridinium salts [R1C5H4NOCH2R2] +·Hlg- (R1 = H, Me, MeO, Me2N; R2 = H, Me, Ph, PhCO; Hlg = Br, I) in acetonitrile at 25°C have been studied. The stability of these salts depends on the substituents R1 and R2. O- and N-Nucleophiles exhibit different sensitivities to steric structure of the alkylating agent. 1996 MAEe Cyrillic signΚ Hayκa/Interperiodica Publishing.

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