55821-18-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 55821-18-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,8,2 and 1 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 55821-18:
(7*5)+(6*5)+(5*8)+(4*2)+(3*1)+(2*1)+(1*8)=126
126 % 10 = 6
So 55821-18-6 is a valid CAS Registry Number.