662109-78-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 662109-78-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,2,1,0 and 9 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 662109-78:
(8*6)+(7*6)+(6*2)+(5*1)+(4*0)+(3*9)+(2*7)+(1*8)=156
156 % 10 = 6
So 662109-78-6 is a valid CAS Registry Number.