437-77-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 437-77-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,3 and 7 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 437-77:
(5*4)+(4*3)+(3*7)+(2*7)+(1*7)=74
74 % 10 = 4
So 437-77-4 is a valid CAS Registry Number.