662158-90-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 662158-90-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,2,1,5 and 8 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 662158-90:
(8*6)+(7*6)+(6*2)+(5*1)+(4*5)+(3*8)+(2*9)+(1*0)=169
169 % 10 = 9
So 662158-90-9 is a valid CAS Registry Number.