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1239717-20-4

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1239717-20-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1239717-20-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,9,7,1 and 7 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1239717-20:
(9*1)+(8*2)+(7*3)+(6*9)+(5*7)+(4*1)+(3*7)+(2*2)+(1*0)=164
164 % 10 = 4
So 1239717-20-4 is a valid CAS Registry Number.

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