19538-81-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19538-81-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,5,3 and 8 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 19538-81:
(7*1)+(6*9)+(5*5)+(4*3)+(3*8)+(2*8)+(1*1)=139
139 % 10 = 9
So 19538-81-9 is a valid CAS Registry Number.