1023817-91-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1023817-91-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,3,8,1 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1023817-91:
(9*1)+(8*0)+(7*2)+(6*3)+(5*8)+(4*1)+(3*7)+(2*9)+(1*1)=125
125 % 10 = 5
So 1023817-91-5 is a valid CAS Registry Number.