3643-57-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3643-57-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,6,4 and 3 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 3643-57:
(6*3)+(5*6)+(4*4)+(3*3)+(2*5)+(1*7)=90
90 % 10 = 0
So 3643-57-0 is a valid CAS Registry Number.