206991-13-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 206991-13-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,6,9,9 and 1 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 206991-13:
(8*2)+(7*0)+(6*6)+(5*9)+(4*9)+(3*1)+(2*1)+(1*3)=141
141 % 10 = 1
So 206991-13-1 is a valid CAS Registry Number.