68783-21-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 68783-21-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,8,7,8 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 68783-21:
(7*6)+(6*8)+(5*7)+(4*8)+(3*3)+(2*2)+(1*1)=171
171 % 10 = 1
So 68783-21-1 is a valid CAS Registry Number.