667907-20-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 667907-20-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,7,9,0 and 7 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 667907-20:
(8*6)+(7*6)+(6*7)+(5*9)+(4*0)+(3*7)+(2*2)+(1*0)=202
202 % 10 = 2
So 667907-20-2 is a valid CAS Registry Number.