4,10-Dibromobenzo[b]biphenylene is a chemical compound characterized by the presence of two bromine atoms attached to a benzo[b]biphenylene molecule. Benzo[b]biphenylene itself is a polycyclic aromatic hydrocarbon, which means it consists of multiple fused benzene rings. Specifically, 4,10-dibromobenzo[b]biphenylene has a structure where a benzene ring is attached to another benzene ring at one carbon atom, forming a biphenyl structure, and then a third benzene ring is fused to the second ring at the 'b' position. The two bromine atoms are located at the 4th and 10th carbon positions of the molecule, which are part of the outer benzene rings. 4,10-dibromobenzo[b]biphenylene is of interest in chemical research due to its potential applications and properties, though it is important to note that like many polycyclic aromatic hydrocarbons, it may have toxicological concerns and should be handled with care.
The CAS Registry Mumber 890-71-1 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 8,9 and 0 respectively; the second part has 2 digits, 7 and 1 respectively. Calculate Digit Verification of CAS Registry Number 890-71: (5*8)+(4*9)+(3*0)+(2*7)+(1*1)=91 91 % 10 = 1 So 890-71-1 is a valid CAS Registry Number.