917919-57-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 917919-57-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,1,7,9,1 and 9 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 917919-57:
(8*9)+(7*1)+(6*7)+(5*9)+(4*1)+(3*9)+(2*5)+(1*7)=214
214 % 10 = 4
So 917919-57-4 is a valid CAS Registry Number.