216452-91-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 216452-91-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,6,4,5 and 2 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 216452-91:
(8*2)+(7*1)+(6*6)+(5*4)+(4*5)+(3*2)+(2*9)+(1*1)=124
124 % 10 = 4
So 216452-91-4 is a valid CAS Registry Number.