641605-44-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 641605-44-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,1,6,0 and 5 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 641605-44:
(8*6)+(7*4)+(6*1)+(5*6)+(4*0)+(3*5)+(2*4)+(1*4)=139
139 % 10 = 9
So 641605-44-9 is a valid CAS Registry Number.