2219-90-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2219-90-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,2,1 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 2219-90:
(6*2)+(5*2)+(4*1)+(3*9)+(2*9)+(1*0)=71
71 % 10 = 1
So 2219-90-1 is a valid CAS Registry Number.