669091-82-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 669091-82-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,9,0,9 and 1 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 669091-82:
(8*6)+(7*6)+(6*9)+(5*0)+(4*9)+(3*1)+(2*8)+(1*2)=201
201 % 10 = 1
So 669091-82-1 is a valid CAS Registry Number.