138523-63-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138523-63-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,5,2 and 3 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 138523-63:
(8*1)+(7*3)+(6*8)+(5*5)+(4*2)+(3*3)+(2*6)+(1*3)=134
134 % 10 = 4
So 138523-63-4 is a valid CAS Registry Number.