17784-27-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 17784-27-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,7,8 and 4 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 17784-27:
(7*1)+(6*7)+(5*7)+(4*8)+(3*4)+(2*2)+(1*7)=139
139 % 10 = 9
So 17784-27-9 is a valid CAS Registry Number.