1216307-91-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1216307-91-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,6,3,0 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1216307-91:
(9*1)+(8*2)+(7*1)+(6*6)+(5*3)+(4*0)+(3*7)+(2*9)+(1*1)=123
123 % 10 = 3
So 1216307-91-3 is a valid CAS Registry Number.