207981-69-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 207981-69-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,7,9,8 and 1 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 207981-69:
(8*2)+(7*0)+(6*7)+(5*9)+(4*8)+(3*1)+(2*6)+(1*9)=159
159 % 10 = 9
So 207981-69-9 is a valid CAS Registry Number.