2105-77-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2105-77-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,1,0 and 5 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 2105-77:
(6*2)+(5*1)+(4*0)+(3*5)+(2*7)+(1*7)=53
53 % 10 = 3
So 2105-77-3 is a valid CAS Registry Number.