5687-21-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5687-21-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,6,8 and 7 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 5687-21:
(6*5)+(5*6)+(4*8)+(3*7)+(2*2)+(1*1)=118
118 % 10 = 8
So 5687-21-8 is a valid CAS Registry Number.