3307-57-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3307-57-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,3,0 and 7 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 3307-57:
(6*3)+(5*3)+(4*0)+(3*7)+(2*5)+(1*7)=71
71 % 10 = 1
So 3307-57-1 is a valid CAS Registry Number.