90988-31-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 90988-31-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,0,9,8 and 8 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 90988-31:
(7*9)+(6*0)+(5*9)+(4*8)+(3*8)+(2*3)+(1*1)=171
171 % 10 = 1
So 90988-31-1 is a valid CAS Registry Number.