4158-38-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4158-38-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,1,5 and 8 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 4158-38:
(6*4)+(5*1)+(4*5)+(3*8)+(2*3)+(1*8)=87
87 % 10 = 7
So 4158-38-7 is a valid CAS Registry Number.