20734-90-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20734-90-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,7,3 and 4 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 20734-90:
(7*2)+(6*0)+(5*7)+(4*3)+(3*4)+(2*9)+(1*0)=91
91 % 10 = 1
So 20734-90-1 is a valid CAS Registry Number.