55643-61-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 55643-61-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,6,4 and 3 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 55643-61:
(7*5)+(6*5)+(5*6)+(4*4)+(3*3)+(2*6)+(1*1)=133
133 % 10 = 3
So 55643-61-3 is a valid CAS Registry Number.