83934-90-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 83934-90-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,9,3 and 4 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 83934-90:
(7*8)+(6*3)+(5*9)+(4*3)+(3*4)+(2*9)+(1*0)=161
161 % 10 = 1
So 83934-90-1 is a valid CAS Registry Number.