201998-18-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 201998-18-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,1,9,9 and 8 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 201998-18:
(8*2)+(7*0)+(6*1)+(5*9)+(4*9)+(3*8)+(2*1)+(1*8)=137
137 % 10 = 7
So 201998-18-7 is a valid CAS Registry Number.