The CAS Registry Mumber 53820-42-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,3,8,2 and 0 respectively; the second part has 2 digits, 4 and 2 respectively. Calculate Digit Verification of CAS Registry Number 53820-42: (7*5)+(6*3)+(5*8)+(4*2)+(3*0)+(2*4)+(1*2)=111 111 % 10 = 1 So 53820-42-1 is a valid CAS Registry Number.
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Get Best Price for53820-42-1(E)-2-Methyl-2-butenoic acid (4S)-4,4a,5,6,7,8,8aβ,9-octahydro-5α-hydroxy-3,4aβ,5-trimethyl-9-oxonaphtho[2,3-b]furan-4β-yl ester