1020997-18-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1020997-18-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,0,9,9 and 7 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1020997-18:
(9*1)+(8*0)+(7*2)+(6*0)+(5*9)+(4*9)+(3*7)+(2*1)+(1*8)=135
135 % 10 = 5
So 1020997-18-5 is a valid CAS Registry Number.