165805-33-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 165805-33-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,5,8,0 and 5 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 165805-33:
(8*1)+(7*6)+(6*5)+(5*8)+(4*0)+(3*5)+(2*3)+(1*3)=144
144 % 10 = 4
So 165805-33-4 is a valid CAS Registry Number.