191542-55-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 191542-55-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,5,4 and 2 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 191542-55:
(8*1)+(7*9)+(6*1)+(5*5)+(4*4)+(3*2)+(2*5)+(1*5)=139
139 % 10 = 9
So 191542-55-9 is a valid CAS Registry Number.