2621-55-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2621-55-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,6,2 and 1 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 2621-55:
(6*2)+(5*6)+(4*2)+(3*1)+(2*5)+(1*5)=68
68 % 10 = 8
So 2621-55-8 is a valid CAS Registry Number.