4389-38-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4389-38-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,3,8 and 9 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 4389-38:
(6*4)+(5*3)+(4*8)+(3*9)+(2*3)+(1*8)=112
112 % 10 = 2
So 4389-38-2 is a valid CAS Registry Number.