Morpholine, 4-(1,4,4a,5,6,7,8,8a-octahydro-4a-methyl-2-naphthalenyl)-,
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The CAS Registry Mumber 40523-75-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,5,2 and 3 respectively; the second part has 2 digits, 7 and 5 respectively. Calculate Digit Verification of CAS Registry Number 40523-75: (7*4)+(6*0)+(5*5)+(4*2)+(3*3)+(2*7)+(1*5)=89 89 % 10 = 9 So 40523-75-9 is a valid CAS Registry Number.