6432-57-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6432-57-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,4,3 and 2 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 6432-57:
(6*6)+(5*4)+(4*3)+(3*2)+(2*5)+(1*7)=91
91 % 10 = 1
So 6432-57-1 is a valid CAS Registry Number.