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Hexabromocyclododecane

Hexabromocyclododecane
Hexabromocyclododecane structure
CAS No.
25637-99-4
Chemical Name:
Hexabromocyclododecane
Synonyms
HBCD;HBCD HT;HEXABROMOCYCLODODECANE;hexabromo-cyclododecan;Cyclododecane, hexabromo-;HEXABROMOCYCLODODECANE HT;BETA-HEXABROMOCYCLODODECANE;GAMMA-HEXABROMOCYCLODODECANE;1,3,5,7,9,11-hexabromocyclododecane;Hexabromcyclododecan, 1,2,5,6,9,10-
CBNumber:
CB4363332
Molecular Formula:
C12H18Br6
Formula Weight:
641.7
MOL File:
25637-99-4.mol

Hexabromocyclododecane Properties

Melting point:
188-191 °C
Density 
1.05 g/cm3
CAS DataBase Reference
25637-99-4(CAS DataBase Reference)
EWG's Food Scores
1
EPA Substance Registry System
Hexabromocyclododecane (25637-99-4)
SAFETY
  • Risk and Safety Statements
Safety Statements  22-24/25
RIDADR  3077
WGK Germany  1
3-9
HazardClass  9
PackingGroup  III

Hexabromocyclododecane Chemical Properties,Uses,Production

Chemical Properties

Hexabromocyclododecane (HBCD) is a white odorless nonvolatile solid compound which is used as an additive flame retardant on its own, or in combination with other flame retardants. It is used as a flame retardant mainly in building insulation composed of extruded or expanded polystyrene foam. A minor use is in flame retardant back-coats of some upholstery textiles.

Uses

The commercially available brominated flame retardant hexabromocyclododecane (HBCD) is lipophilic, has a high affinity to particulate matter and low water solubility. It is used as a flame retardant additive, with the intent of delaying ignition and slowing subsequent fire growth during the service life of vehicles, buildings or articles, as well as while materials are stored. The main uses of HBCD are in flame-retarded expanded (EPS) and extruded (XPS) polystyrene foam insulation, with smaller scale use in textile applications and electric and electronic appliances (high impact polystyrene/HIPS). In textiles HBCD is used in back-coatings for upholstery and other interior textiles, including automotive applications.

Preparation

The aliphatic flame retardant, hexabromocyclododecane (HBCD), is produced by the addition reaction of bromine to trans,trans,cis-1,5,9-cyclododecatriene, the cyclic trimer of butadiene. The HBCD that is obtained from this reaction consists of a mixture of stereoisomers of 1,2,5,6,9,10-hexabromocyclo-dodecane [3194-55-6] ranging from oils to an isomer with a 205–208℃ melting point. Commercially available HBCD contains a mixture of solid isomers and has a melting point range of 170–180 ℃  (185–195℃ ).
Addition of bromine to the cyclic triene in nonpolar solvents results in substantial amounts of free-radical substitution reactions which lead to decreased yields and lower quality product. Use of polar solvents, such as ethanol, reduces the substitution reaction but can give rise to vicinal bromoethoxy by products. Mixed solvent systems, such as benzene–tert-butyl alcohol or perchloroethylene-ethanol,can be employed to improve product purities and yields.
Another technique to reduce the formation of undesired byproducts is to add the bromine and cyclododecatriene simultaneously and sep- arately to ethanol. This process is carried out by separately feeding bromine and cyclo- dodecatriene in a molar ratio of 3 : 1 to 96 % ethanolinastirredreactor.The reaction temperature is kept at 20-30℃ and a 1-5% excess of bromine is maintained during the 2.5–3.0h addition. The precipitated product is recovered by filtration or centrifugation, and the mother liquor is recovered and reused in subsequent reactions after adding makeup ethanol. The total yield of dried HBCD from nine separate batches using recycled mother liquor is 92%.

General Description

HexabroMocyclododecane is White powder. Insoluble in water.

Air & Water Reactions

HexabroMocyclododecane is Insoluble in water.

Reactivity Profile

Halogenated aliphatic compounds, such as Hexabromocyclododecane, are moderately or very reactive. Reactivity generally decreases with increased degree of substitution of halogen for hydrogen atoms. Materials in this group may be incompatible with strong oxidizing and reducing agents. Also, they may be incompatible with many amines, nitrides, azo/diazo compounds, alkali metals, and epoxides. Hexabromocyclododecane can react vigorously with oxidizing materials.

Fire Hazard

Flash point data for Hexabromocyclododecane are not available. Hexabromocyclododecane is probably combustible.

Hexabromocyclododecane Preparation Products And Raw materials

Raw materials

Preparation Products


Hexabromocyclododecane Suppliers

Global( 87)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan DaKen Chemical CO.,LTD.
+86-371-66670886
info@dakenchem.com China 21032 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693
0371-55170693 info@tianfuchem.com CHINA 22607 55
ATK CHEMICAL COMPANY LIMITED
+86 21 5161 9050/ 5187 7795
+86 21 5161 9052/ 5187 7796 ivan@atkchemical.com CHINA 26734 60
career henan chemical co
+86-371-86658258
sales@coreychem.com CHINA 29961 58
Chongqing Chemdad Co., Ltd
+86-13650506873
sales@chemdad.com CHINA 37282 58
Shaanxi Dideu Medichem Co. Ltd
15336106720
029-88380327 1017@dideu.com CHINA 3979 58
Shaanxi Dideu Medichem Co. Ltd
18192503167 +86-29-89586680
+86-29-88380327 1005@dideu.com CHINA 9937 58
Mainchem Co., Ltd. +86-0592-6210733
+86-0592-6210733 sale@mainchem.com CHINA 32439 55
Tianjin heowns Biochemical Technology Co., Ltd. 400 638 7771
sales@heowns.com China 14457 57
Beijing Yisiyan Technology Research Center 13366904824
01062230033 bjkaida@163.com; China 1736 59

View Lastest Price from Hexabromocyclododecane manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2020-01-07 HexabroMocyclododecane
25637-99-4
US $1.00 / KG 1KG 99% 20T Shaanxi Dideu Medichem Co. Ltd
2019-07-12 Hexabromocyclododecane
25637-99-4
US $1.00 / KG 1KG 99% 25kg career henan chemical co

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