919970-51-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 919970-51-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,1,9,9,7 and 0 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 919970-51:
(8*9)+(7*1)+(6*9)+(5*9)+(4*7)+(3*0)+(2*5)+(1*1)=217
217 % 10 = 7
So 919970-51-7 is a valid CAS Registry Number.