919970-89-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 919970-89-1 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, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 919970-89:
(8*9)+(7*1)+(6*9)+(5*9)+(4*7)+(3*0)+(2*8)+(1*9)=231
231 % 10 = 1
So 919970-89-1 is a valid CAS Registry Number.