109638-19-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109638-19-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,6,3 and 8 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 109638-19:
(8*1)+(7*0)+(6*9)+(5*6)+(4*3)+(3*8)+(2*1)+(1*9)=139
139 % 10 = 9
So 109638-19-9 is a valid CAS Registry Number.