(3aS,10bR,12bS)-5-Chloro-3a-ethyl-5-nitro-2,3,3a,4,5,11,12,12b-octahydro-1H-6,12a-diaza-indeno[7,1-cd]fluorene is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 111981-16-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,9,8 and 1 respectively; the second part has 2 digits, 1 and 6 respectively. Calculate Digit Verification of CAS Registry Number 111981-16: (8*1)+(7*1)+(6*1)+(5*9)+(4*8)+(3*1)+(2*1)+(1*6)=109 109 % 10 = 9 So 111981-16-9 is a valid CAS Registry Number.