1231713-57-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1231713-57-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,3,1,7,1 and 3 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1231713-57:
(9*1)+(8*2)+(7*3)+(6*1)+(5*7)+(4*1)+(3*3)+(2*5)+(1*7)=117
117 % 10 = 7
So 1231713-57-7 is a valid CAS Registry Number.