4722-21-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4722-21-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,7,2 and 2 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 4722-21:
(6*4)+(5*7)+(4*2)+(3*2)+(2*2)+(1*1)=78
78 % 10 = 8
So 4722-21-8 is a valid CAS Registry Number.