219911-80-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 219911-80-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,9,1 and 1 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 219911-80:
(8*2)+(7*1)+(6*9)+(5*9)+(4*1)+(3*1)+(2*8)+(1*0)=145
145 % 10 = 5
So 219911-80-5 is a valid CAS Registry Number.