199857-43-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 199857-43-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,9,8,5 and 7 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 199857-43:
(8*1)+(7*9)+(6*9)+(5*8)+(4*5)+(3*7)+(2*4)+(1*3)=217
217 % 10 = 7
So 199857-43-7 is a valid CAS Registry Number.