ethyl (1S,2S,4aR,6R,8S,8aS)-1,2,4a,5,6,7,8,8a-octahydro-6,8-dihydroxy-2-methylnaphthalene-1-carboxylate is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 138505-81-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,5,0 and 5 respectively; the second part has 2 digits, 8 and 1 respectively. Calculate Digit Verification of CAS Registry Number 138505-81: (8*1)+(7*3)+(6*8)+(5*5)+(4*0)+(3*5)+(2*8)+(1*1)=134 134 % 10 = 4 So 138505-81-4 is a valid CAS Registry Number.