6557-01-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6557-01-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,5,5 and 7 respectively; the second part has 2 digits, 0 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 6557-01:
(6*6)+(5*5)+(4*5)+(3*7)+(2*0)+(1*1)=103
103 % 10 = 3
So 6557-01-3 is a valid CAS Registry Number.