209979-67-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 209979-67-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,9,9,7 and 9 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 209979-67:
(8*2)+(7*0)+(6*9)+(5*9)+(4*7)+(3*9)+(2*6)+(1*7)=189
189 % 10 = 9
So 209979-67-9 is a valid CAS Registry Number.