1022731-91-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1022731-91-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,2,7,3 and 1 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1022731-91:
(9*1)+(8*0)+(7*2)+(6*2)+(5*7)+(4*3)+(3*1)+(2*9)+(1*1)=104
104 % 10 = 4
So 1022731-91-4 is a valid CAS Registry Number.