67720-26-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 67720-26-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,7,2 and 0 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 67720-26:
(7*6)+(6*7)+(5*7)+(4*2)+(3*0)+(2*2)+(1*6)=137
137 % 10 = 7
So 67720-26-7 is a valid CAS Registry Number.