220917-90-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 220917-90-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,0,9,1 and 7 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 220917-90:
(8*2)+(7*2)+(6*0)+(5*9)+(4*1)+(3*7)+(2*9)+(1*0)=118
118 % 10 = 8
So 220917-90-8 is a valid CAS Registry Number.