1640117-38-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1640117-38-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,4,0,1,1 and 7 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1640117-38:
(9*1)+(8*6)+(7*4)+(6*0)+(5*1)+(4*1)+(3*7)+(2*3)+(1*8)=129
129 % 10 = 9
So 1640117-38-9 is a valid CAS Registry Number.