1858-71-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1858-71-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,8,5 and 8 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1858-71:
(6*1)+(5*8)+(4*5)+(3*8)+(2*7)+(1*1)=105
105 % 10 = 5
So 1858-71-5 is a valid CAS Registry Number.