551909-42-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 551909-42-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,5,1,9,0 and 9 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 551909-42:
(8*5)+(7*5)+(6*1)+(5*9)+(4*0)+(3*9)+(2*4)+(1*2)=163
163 % 10 = 3
So 551909-42-3 is a valid CAS Registry Number.