1838-71-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1838-71-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,8,3 and 8 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1838-71:
(6*1)+(5*8)+(4*3)+(3*8)+(2*7)+(1*1)=97
97 % 10 = 7
So 1838-71-7 is a valid CAS Registry Number.