1655-77-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1655-77-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,5 and 5 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1655-77:
(6*1)+(5*6)+(4*5)+(3*5)+(2*7)+(1*7)=92
92 % 10 = 2
So 1655-77-2 is a valid CAS Registry Number.