223689-90-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 223689-90-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,3,6,8 and 9 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 223689-90:
(8*2)+(7*2)+(6*3)+(5*6)+(4*8)+(3*9)+(2*9)+(1*0)=155
155 % 10 = 5
So 223689-90-5 is a valid CAS Registry Number.