17887-71-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 17887-71-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,8,8 and 7 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 17887-71:
(7*1)+(6*7)+(5*8)+(4*8)+(3*7)+(2*7)+(1*1)=157
157 % 10 = 7
So 17887-71-7 is a valid CAS Registry Number.