21705-34-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21705-34-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,7,0 and 5 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 21705-34:
(7*2)+(6*1)+(5*7)+(4*0)+(3*5)+(2*3)+(1*4)=80
80 % 10 = 0
So 21705-34-0 is a valid CAS Registry Number.