The CAS Registry Mumber 1099-42-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,0,9 and 9 respectively; the second part has 2 digits, 4 and 2 respectively. Calculate Digit Verification of CAS Registry Number 1099-42: (6*1)+(5*0)+(4*9)+(3*9)+(2*4)+(1*2)=79 79 % 10 = 9 So 1099-42-9 is a valid CAS Registry Number.
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Get Best Price for1099-42-9((2'S,3'R,6'R)-3'-acetoxy-6'-hydroxy-2',4',6'-trimethyl-7'-oxo-2',3',6',7'-tetrahydrospiro[cyclopropane-1,5'-inden]-2'-yl)methyl acetate