219901-21-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 219901-21-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,9,0 and 1 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 219901-21:
(8*2)+(7*1)+(6*9)+(5*9)+(4*0)+(3*1)+(2*2)+(1*1)=130
130 % 10 = 0
So 219901-21-0 is a valid CAS Registry Number.