1604801-55-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1604801-55-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,0,4,8,0 and 1 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1604801-55:
(9*1)+(8*6)+(7*0)+(6*4)+(5*8)+(4*0)+(3*1)+(2*5)+(1*5)=139
139 % 10 = 9
So 1604801-55-9 is a valid CAS Registry Number.