71637-99-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71637-99-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,6,3 and 7 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 71637-99:
(7*7)+(6*1)+(5*6)+(4*3)+(3*7)+(2*9)+(1*9)=145
145 % 10 = 5
So 71637-99-5 is a valid CAS Registry Number.