(1R,3aR,5aR,8aS)-1-Bromo-1,7,7-trimethyl-2-oxo-1,2,3,3a,5a,6,7,8-octahydro-cyclopenta[c]pentalene-4-carboxylic acid methyl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 89111-57-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,1,1 and 1 respectively; the second part has 2 digits, 5 and 7 respectively. Calculate Digit Verification of CAS Registry Number 89111-57: (7*8)+(6*9)+(5*1)+(4*1)+(3*1)+(2*5)+(1*7)=139 139 % 10 = 9 So 89111-57-9 is a valid CAS Registry Number.
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