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Flame retardants

alpha-Hexabromocyclododecane

Also known as alpha-HBCD, Cyclododecane, 1,2,5,6,9,10-hexabromo-, (1R,2R,5S,6R,9R,10S)-rel-, (+-)-ALPHA-HBCD

CAS 134237-50-6Formula C12H18Br6Molar mass 641.70 g/molEC 603-801-9
GHS signal word: Warning. Pictograms: Serious health hazard, Hazardous to the environment 2 suppliers listed
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alpha-Hexabromocyclododecane chemical structure, C12H18Br6, CAS 134237-50-6
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
134237-50-6
Formula
C12H18Br6
Molar mass
641.70 g/mol
EC number
603-801-9
HS code
290389
Category
Flame retardants

What is alpha-Hexabromocyclododecane?

Plain description, key identifiers and synonyms

alpha-Hexabromocyclododecane is a chemical substance with the molecular formula C12H18Br6 and a molar mass of 641.70 g/mol. Its CAS registry number is 134237-50-6. The IUPAC name is (1R,2R,5S,6R,9R,10S)-1,2,5,6,9,10-hexabromocyclododecane.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(1R,2R,5S,6R,9R,10S)-1,2,5,6,9,10-hexabromocyclododecane
CAS number
134237-50-6 CAS number cross-checkedOther or deprecated CAS: 678970-15-5
EC number
603-801-9
Molecular formula
C12H18Br6
UNII
1Q53DD47II, A9X5ZAC15C
InChIKey
DEIGXXQKDWULML-PQTSNVLCSA-N
InChI
InChI=1S/C12H18Br6/c13-7-1-2-8(14)10(16)5-6-12(18)11(17)4-3-9(7)15/h7-12H,1-6H2/t7-,8-,9+,10+,11-,12-/m1/s1
Canonical SMILES
BrC1CCC(Br)C(Br)CCC(Br)C(Br)CCC1Br
Isomeric SMILES
C1C[C@H]([C@H](CC[C@H]([C@@H](CC[C@@H]([C@@H]1Br)Br)Br)Br)Br)Br

Synonyms

  • alpha-HBCD
  • Cyclododecane, 1,2,5,6,9,10-hexabromo-, (1R,2R,5S,6R,9R,10S)-rel-
  • (+-)-ALPHA-HBCD
  • alpha-Hexabromocyclododecane, (+-)-
  • (-)-alpha-Hbcd
  • (-)-alpha-Hexabromocyclododecane
  • alpha-Hexabromocyclododecane, (-)-
  • (1R,2R,5S,6R,9R,10S)-rel-1,2,5,6,9,10-Hexabromocyclododecane
  • (1R,2R,5S,6R,9R,10S)-1,2,5,6,9,10-Hexabromocyclododecane
  • Cyclododecane, 1,2,5,6,9,10-hexabromo-, (1R,2R,5S,6R,9R,10S)-
  • C12H18Br6
  • (+/-)-alpha-HBCD
  • Hexabromocyclododecane, alpha-
  • (+/-)-alpha-Hexabromocyclododecane
  • alpha-1,2,5,6,9,10-Hexabromocyclododecane
  • alpha-hexabromocyclododecane, (+/-)-
  • (+/-)-alpha-Hexabromocyclododecane, analytical standard
  • rel-(1R,2R,5S,6R,9R,10S)-1,2,5,6,9,10-hexabromocyclododecane

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
641.70 g/molcalc.
Exact mass
635.6509 Dacalc.
LogP (octanol/water)
6.92calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
18calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
6calc.
Lipinski rule of five
Fails (2 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, C1CCCCCCCCCCC1

C1CCCCCCCCCCC1

1 ring, 12 atoms, the Cyclododecane ring system.

189 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H361Suspected of damaging fertility or the unborn child.
  • H362May cause harm to breast-fed children.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (11)
  • P203Obtain, read and follow all safety instructions before use.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P263Avoid contact during pregnancy and while nursing.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P318If exposed or concerned, get medical advice.
  • P391Collect spillage.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

alpha-Hexabromocyclododecane suppliers

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All 2 suppliers

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Where suppliers are based

2 suppliers in 2 countries

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alpha-Hexabromocyclododecane price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code alpha-Hexabromocyclododecane is traded under.

HS 2903.89Indicative HS code

Halogenated derivatives of cyclanic, cyclenic or cycloterpenic hydrocarbons, other

World exports in 2024
$92.3M
−2.2% vs 2023, imports $90.8M
2019 to 2024
Top exporters
  1. China40.4%
  2. Japan26.5%
  3. United Kingdom7.2%
Top importers
  1. South Korea19.2%
  2. Japan16.6%
  3. United States15.8%
Reported customs values in USD, not prices.Full trade data

The HS code shown for alpha-Hexabromocyclododecane is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about alpha-Hexabromocyclododecane, based on the data on this page

What is alpha-Hexabromocyclododecane?

alpha-Hexabromocyclododecane is a chemical substance with the molecular formula C12H18Br6 and a molar mass of 641.70 g/mol. Its CAS registry number is 134237-50-6. The IUPAC name is (1R,2R,5S,6R,9R,10S)-1,2,5,6,9,10-hexabromocyclododecane.

What is the CAS number of alpha-Hexabromocyclododecane?

The CAS registry number of alpha-Hexabromocyclododecane is 134237-50-6. Other or deprecated CAS numbers: 678970-15-5.

What is the molecular formula and weight of alpha-Hexabromocyclododecane?

The molecular formula of alpha-Hexabromocyclododecane is C12H18Br6 and its molar mass is 641.70 g/mol.

Is alpha-Hexabromocyclododecane hazardous?

alpha-Hexabromocyclododecane carries the GHS signal word "Warning". Main hazards: suspected of damaging fertility or the unborn child, may cause harm to breast-fed children, very toxic to aquatic life. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of alpha-Hexabromocyclododecane?

alpha-Hexabromocyclododecane is usually classified under HS code 290389 (Halogenated derivatives of cyclanic, cyclenic or cycloterpenic hydrocarbons, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy alpha-Hexabromocyclododecane?

CompoundList lists 2 suppliers of alpha-Hexabromocyclododecane in Canada and France. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of alpha-Hexabromocyclododecane?

Suppliers quote alpha-Hexabromocyclododecane on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle alpha-Hexabromocyclododecane

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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