34784-39-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 34784-39-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,4,7,8 and 4 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 34784-39:
(7*3)+(6*4)+(5*7)+(4*8)+(3*4)+(2*3)+(1*9)=139
139 % 10 = 9
So 34784-39-9 is a valid CAS Registry Number.