161949-55-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 161949-55-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,1,9,4 and 9 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 161949-55:
(8*1)+(7*6)+(6*1)+(5*9)+(4*4)+(3*9)+(2*5)+(1*5)=159
159 % 10 = 9
So 161949-55-9 is a valid CAS Registry Number.