193540-23-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 193540-23-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,3,5,4 and 0 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 193540-23:
(8*1)+(7*9)+(6*3)+(5*5)+(4*4)+(3*0)+(2*2)+(1*3)=137
137 % 10 = 7
So 193540-23-7 is a valid CAS Registry Number.