2091-79-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2091-79-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,0,9 and 1 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 2091-79:
(6*2)+(5*0)+(4*9)+(3*1)+(2*7)+(1*9)=74
74 % 10 = 4
So 2091-79-4 is a valid CAS Registry Number.