1240684-31-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1240684-31-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,4,0,6,8 and 4 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1240684-31:
(9*1)+(8*2)+(7*4)+(6*0)+(5*6)+(4*8)+(3*4)+(2*3)+(1*1)=134
134 % 10 = 4
So 1240684-31-4 is a valid CAS Registry Number.