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Hexabromocyclododecane



Hexabromocyclododecane
IUPAC name 1,2,5,6,9,10-Hexabromocyclododecane
Other names Hexabromocyclododecane
Identifiers
Abbreviations HBCDD
HBCD
CAS number 25637-99-4
SMILES C1(Br)C(Br)CCC(Br)C(Br)CCC(Br)C(Br)CC1
Properties
Molecular formula C12H18Br6
Molar mass 641.7
Melting point

186 °C (175–195 °C, depending upon isomer)

Solubility in water 3.4 µg/L in water
Hazards
NFPA 704
1
2
0
 
R-phrases R43
S-phrases S24
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

Hexabromocyclododecane (HBCD or HBCDD) is a brominated flame retardant. Its primary application is in extruded (XPS) and expanded (EPS) polystyrene foam that is used as thermal insulation in the building industry. HBCD is highly efficient in this application so that very low levels are required to reach the desired flame retardancy. Typical HBCD levels in EPS are 0.7% and in XPS 2.5%. At present, HBCD is the only suitable flame retardant for these applications. Any other flame retardant would likely need higher load levels in the polystyrene foam. Other uses are upholstered furniture, automobile interior textiles, car cushions and insulation blocks in trucks, packaging material, video cassette recorder housing and electric and electronical equipment. The industrial demand in Europe is estimated as 9500 tons per year.[1]

Additional recommended knowledge

HBCD's toxicity and its harm to the environment are currently discussed. HBCD can be found in environmental samples such as birds, mammals, fish and other aquatic organisms as well as soil and sediment.[2]

References

  1. ^ BSEF http://www.bsef.com/docs/BFR_vols_2001.doc
  2. ^ Covaci A, Gerecke AC et al.: "Hexabromocyclododecanes (HBCDs) in the environment and humans: a review". Environ Sci Technol. 2006 Jun 15;40(12):3679-88. PMID 16830527
 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Hexabromocyclododecane". A list of authors is available in Wikipedia.
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