91783-90-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91783-90-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,7,8 and 3 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 91783-90:
(7*9)+(6*1)+(5*7)+(4*8)+(3*3)+(2*9)+(1*0)=163
163 % 10 = 3
So 91783-90-3 is a valid CAS Registry Number.