309712-98-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 309712-98-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,0,9,7,1 and 2 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 309712-98:
(8*3)+(7*0)+(6*9)+(5*7)+(4*1)+(3*2)+(2*9)+(1*8)=149
149 % 10 = 9
So 309712-98-9 is a valid CAS Registry Number.