216431-69-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 216431-69-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,6,4,3 and 1 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 216431-69:
(8*2)+(7*1)+(6*6)+(5*4)+(4*3)+(3*1)+(2*6)+(1*9)=115
115 % 10 = 5
So 216431-69-5 is a valid CAS Registry Number.