309918-74-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 309918-74-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,9,9,1 and 8 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 309918-74:
(8*3)+(7*0)+(6*9)+(5*9)+(4*1)+(3*8)+(2*7)+(1*4)=169
169 % 10 = 9
So 309918-74-9 is a valid CAS Registry Number.