691909-53-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 691909-53-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,9,1,9,0 and 9 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 691909-53:
(8*6)+(7*9)+(6*1)+(5*9)+(4*0)+(3*9)+(2*5)+(1*3)=202
202 % 10 = 2
So 691909-53-2 is a valid CAS Registry Number.