4138-72-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4138-72-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,1,3 and 8 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 4138-72:
(6*4)+(5*1)+(4*3)+(3*8)+(2*7)+(1*2)=81
81 % 10 = 1
So 4138-72-1 is a valid CAS Registry Number.