CAS DataBase Reference:N'-(1-methoxy-9a,9b-dimethyl-3,3a,4,5,8,9,9a,9b-octahydro-1H-naphtho[1,2-c]furan-7-ylidene)-N,N-dimethyl-hydrazine(CAS DataBase Reference)
The CAS Registry Mumber 502613-90-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,0,2,6,1 and 3 respectively; the second part has 2 digits, 9 and 0 respectively. Calculate Digit Verification of CAS Registry Number 502613-90: (8*5)+(7*0)+(6*2)+(5*6)+(4*1)+(3*3)+(2*9)+(1*0)=113 113 % 10 = 3 So 502613-90-3 is a valid CAS Registry Number.