123938-54-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 123938-54-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,3,9,3 and 8 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 123938-54:
(8*1)+(7*2)+(6*3)+(5*9)+(4*3)+(3*8)+(2*5)+(1*4)=135
135 % 10 = 5
So 123938-54-5 is a valid CAS Registry Number.