71887-77-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71887-77-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,8,8 and 7 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 71887-77:
(7*7)+(6*1)+(5*8)+(4*8)+(3*7)+(2*7)+(1*7)=169
169 % 10 = 9
So 71887-77-9 is a valid CAS Registry Number.