Hexabrom-cyclobuten, also known as hexabromocyclobutane (HBCB), is a brominated flame retardant chemical compound with the formula C4Br6. It is a white crystalline solid that has been widely used in various applications, such as in the production of expanded polystyrene foam, extruded polystyrene foam, and high-impact polystyrene. HBCB is effective in reducing the flammability of materials, but its environmental persistence, bioaccumulation, and potential toxicity have raised concerns. As a result, its use has been restricted or banned in several countries due to its negative impact on human health and the environment.
The CAS Registry Mumber 6130-83-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,1,3 and 0 respectively; the second part has 2 digits, 8 and 3 respectively. Calculate Digit Verification of CAS Registry Number 6130-83: (6*6)+(5*1)+(4*3)+(3*0)+(2*8)+(1*3)=72 72 % 10 = 2 So 6130-83-2 is a valid CAS Registry Number.