CAS number
CAS 134237-51-7 Hexabromocyclododecane
CAS 3194-55-6 · CAS 25637-99-4 · CAS 134237-50-6 · CAS 134237-51-7 · CAS 134237-52-8 · EC 221-695-9 · EC 247-148-4
Where CAS 134237-51-7 appears: every table entry that prints it among its identifiers, in the newest version of each act this record holds, and every recorded change to those entries. Many entries name a group of substances and print no number, so absence here is not absence from the law. Not legal advice.
Where it appears now
PIC Regulation Annex I, table 3, the entry for Hexabromocyclododecane
Last changed in the version in force , by Regulation (EU) 2022/643, the act that change names · Annex I on this site
| Chemical | Relevant CAS number(s) | HS code Pure substance | HS code Mixtures containing substance | Category |
|---|---|---|---|---|
| Hexabromocyclododecane | 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 and others | ex 2903.89 | Industrial |
PIC Regulation Annex V, the entry for Hexabromocyclododecane
Last changed in the version in force , by Regulation (EU) 2022/643, the act that change names · Annex V on this site
| Description of chemicals/article(s) subject to export ban | Additional details, where relevant (e.g. name of chemical, EC No, CAS No, etc.) | |
|---|---|---|
| Hexabromocyclododecane | EC No 247-148-4, 221-695-9 CAS No 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 and others CN code ex29038980 | |
POPs Regulation Annex I, the entry for Hexabromocyclododecane
Last changed in the version detected · Annex I on this site
| Substance | CAS No | EC No | Specific exemption on intermediate use or other specification |
|---|---|---|---|
| Hexabromocyclododecane Hexabromocyclododecane means: hexabromocyclododecane, 1,2,5,6,9,10-hexabromocyclododecane and its main diastereoisomers: alpha-hexabromocyclododecane; beta-hexabromocyclododecane; and gamma-hexabromocyclododecane | 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 | 247-148-4, 221-695-9 | 1. For the purposes of this entry, Article 4(1), point (b), shall apply to concentrations of hexabromocyclododecane equal to or below 75 mg/kg (0,0075 % by weight) where it is present in substances, mixtures, articles or as constituents of the flame-retarded articles. For the use of recycled polystyrene in the production of EPS and XPS insulation material for use in buildings or civil engineering works, point (b) shall apply to concentrations of hexabromocyclododecane equal to or below 100 mg/kg (0,01 % by weight). The exemptions laid down in this point 1 shall be reviewed and assessed by the Commission by 1 January 2026. 2. Expanded polystyrene articles containing hexabromocyclododecane already in use in buildings before 21 February 2018 in accordance with Commission Regulation (EU) 2016/293 and Commission Implementing Decision No 2016/C 12/06 , and extruded polystyrene articles containing hexabromocyclododecane already in use in buildings before 23 June 2016 may continue to be used. Article 4(2), third and fourth subparagraphs shall apply to such articles. 3. Without prejudice to the application of other Union provisions on the classification, packaging and labelling of substances and mixtures, expanded polystyrene placed on the market after 23 March 2016 in which hexabromocyclododecane was used shall be identifiable by labelling or other means throughout its life cycle. |
POPs Regulation Annex IV, the entry for Hexabromocyclododecane
Last changed in the version in force , by Regulation (EU) 2025/2457, the act that change names · Annex IV on this site
| Substance | CAS No | EC No | Concentration limit referred to in Article 7(4)(a) |
|---|---|---|---|
| Hexabromocyclododecane | 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 | 247-148-4 221-695-9 | 500 mg/kg By 30 December 2027, the Commission shall review that concentration limit and shall, where appropriate, adopt a delegated act in accordance with Article 15(2) to lower that value to not higher than 200 mg/kg. |
REACH Annex XIV, Entry 3
No change to this entry since the first version the record holds, in force 12 October 2008. · Annex XIV on this site
| Entry Nr | Substance | Intrinsic property(ies) referred to in Article 57 | Transitional arrangements | Exempted (categories of) uses | Review periods | |
|---|---|---|---|---|---|---|
| Latest application date | Sunset date | |||||
| 3. | Hexabromocyclododecane (HBCDD) EC No 221-695-9, 247-148-4, CAS No 3194-55-6 25637-99-4 alpha-hexabromocyclododecane CAS No 134237-50-6, beta-hexabromocyclododecane CAS No 134237-51-7 gamma-hexabromocyclododecane CAS No 134237-52-8 | PBT | 21 February 2014 | 21 August 2015 | — | — |
Look up a number
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Its history
· removed · POPs Regulation Annex I, the entry for 1 Hexabromocyclododecane
Recorded in the version detected . The change on its version page
| Identifiers | Substance | CAS No | EC No | Specific exemption on intermediate use or other specification |
|---|---|---|---|---|
| 1 HexabromocyclododecaneCAS 134237-50-6CAS 134237-51-7CAS 134237-52-8CAS 25637-99-4CAS 3194-55-6EC 221-695-9EC 247-148-4 | 1 Hexabromocyclododecane Hexabromocyclododecane means: hexabromocyclododecane, 1,2,5,6,9,10-hexabromocyclododecane and its main diastereoisomers: alpha-hexabromocyclododecane; beta-hexabromocyclododecane; and gamma-hexabromocyclododecane | 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 | 247-148-4, 221-695-9 | 1. For the purposes of this entry, point (b) of Article 4(1) shall apply to concentrations of hexabromocyclododecane equal to or below 100 mg/kg (0,01 % by weight) where it is present in substances, mixtures, articles or as constituents of the flame-retarded articles, subject to review by the Commission by 22 March 2019. 2. Expanded polystyrene articles containing hexabromocyclododecane already in use in buildings before 21 February 2018 in accordance with Commission Regulation (EU) 2016/293 and Commission Implementing Decision No 2016/C 12/06 , and extruded polystyrene articles containing hexabromocyclododecane already in use in buildings before 23 June 2016 may continue to be used. Article 4(2), third and fourth subparagraphs shall apply to such articles. 3. Without prejudice to the application of other Union provisions on the classification, packaging and labelling of substances and mixtures, expanded polystyrene placed on the market after 23 March 2016 in which hexabromocyclododecane was used shall be identifiable by labelling or other means throughout its life cycle. |
· added · POPs Regulation Annex I, the entry for Hexabromocyclododecane
Recorded in the version detected . The change on its version page
| Identifiers | Substance | CAS No | EC No | Specific exemption on intermediate use or other specification |
|---|---|---|---|---|
| HexabromocyclododecaneCAS 134237-50-6CAS 134237-51-7CAS 134237-52-8CAS 25637-99-4CAS 3194-55-6EC 221-695-9EC 247-148-4 | Hexabromocyclododecane Hexabromocyclododecane means: hexabromocyclododecane, 1,2,5,6,9,10-hexabromocyclododecane and its main diastereoisomers: alpha-hexabromocyclododecane; beta-hexabromocyclododecane; and gamma-hexabromocyclododecane | 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 | 247-148-4, 221-695-9 | 1. For the purposes of this entry, point (b) of Article 4(1) shall apply to concentrations of hexabromocyclododecane equal to or below 100 mg/kg (0,01 % by weight) where it is present in substances, mixtures, articles or as constituents of the flame-retarded articles, subject to review by the Commission by 22 March 2019. 2. Expanded polystyrene articles containing hexabromocyclododecane already in use in buildings before 21 February 2018 in accordance with Commission Regulation (EU) 2016/293 and Commission Implementing Decision No 2016/C 12/06 , and extruded polystyrene articles containing hexabromocyclododecane already in use in buildings before 23 June 2016 may continue to be used. Article 4(2), third and fourth subparagraphs shall apply to such articles. 3. Without prejudice to the application of other Union provisions on the classification, packaging and labelling of substances and mixtures, expanded polystyrene placed on the market after 23 March 2016 in which hexabromocyclododecane was used shall be identifiable by labelling or other means throughout its life cycle. |
· amended · POPs Regulation Annex IV, the entry for Hexabromocyclododecane
Recorded in the version in force , by Regulation (EU) 2025/2457, the act that change names. The change on its version page
| Identifiers | Version | Substance | CAS No | EC No | Concentration limit referred to in Article 7(4)(a) |
|---|---|---|---|---|---|
| HexabromocyclododecaneCAS 134237-50-6CAS 134237-51-7CAS 134237-52-8CAS 25637-99-4CAS 3194-55-6EC 221-695-9EC 247-148-4 | Before | Hexabromocyclododecane | 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 | 247-148-4 221-695-9 | 500 mg/kg
|
| After | Hexabromocyclododecane | 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 | 247-148-4 221-695-9 | 500 mg/kg By 30 December 2027, the Commission shall review that concentration limit and shall, where appropriate, adopt a delegated act in accordance with Article 15(2) to lower that value to not higher than 200 mg/kg. |
· amended · POPs Regulation Annex I, the entry for Hexabromocyclododecane
Recorded in the version in force , by Regulation (EU) 2024/2570 and Regulation (EU) 2024/2555, the acts that change names. The change on its version page
| Identifiers | Version | Substance | CAS No | EC No | Specific exemption on intermediate use or other specification |
|---|---|---|---|---|---|
| HexabromocyclododecaneCAS 134237-50-6CAS 134237-51-7CAS 134237-52-8CAS 25637-99-4CAS 3194-55-6EC 221-695-9EC 247-148-4 | Before | Hexabromocyclododecane Hexabromocyclododecane means: hexabromocyclododecane, 1,2,5,6,9,10-hexabromocyclododecane and its main diastereoisomers: alpha-hexabromocyclododecane; beta-hexabromocyclododecane; and gamma-hexabromocyclododecane | 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 | 247-148-4, 221-695-9 | 1. For the purposes of this entry, point |
| After | Hexabromocyclododecane Hexabromocyclododecane means: hexabromocyclododecane, 1,2,5,6,9,10-hexabromocyclododecane and its main diastereoisomers: alpha-hexabromocyclododecane; beta-hexabromocyclododecane; and gamma-hexabromocyclododecane | 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 | 247-148-4, 221-695-9 | 1. For the purposes of this entry, Article 4(1), point (b), shall apply to concentrations of hexabromocyclododecane equal to or below 75 mg/kg (0,0075 % by weight) where it is present in substances, mixtures, articles or as constituents of the flame-retarded articles. For the use of recycled polystyrene in the production of EPS and XPS insulation material for use in buildings or civil engineering works, point (b) shall apply to concentrations of hexabromocyclododecane equal to or below 100 mg/kg (0,01 % by weight). The exemptions laid down in this point 1 shall be reviewed and assessed by the Commission by 1 January 2026. 2. Expanded polystyrene articles containing hexabromocyclododecane already in use in buildings before 21 February 2018 in accordance with Commission Regulation (EU) 2016/293 and Commission Implementing Decision No 2016/C 12/06 , and extruded polystyrene articles containing hexabromocyclododecane already in use in buildings before 23 June 2016 may continue to be used. Article 4(2), third and fourth subparagraphs shall apply to such articles. 3. Without prejudice to the application of other Union provisions on the classification, packaging and labelling of substances and mixtures, expanded polystyrene placed on the market after 23 March 2016 in which hexabromocyclododecane was used shall be identifiable by labelling or other means throughout its life cycle. |
· amended · POPs Regulation Annex IV, the entry for Hexabromocyclododecane
Recorded in the version in force , by Regulation (EU) 2022/2400, the act that change names. The change on its version page
| Identifiers | Version | Substance | CAS No | EC No | Concentration limit referred to in Article 7(4)(a) |
|---|---|---|---|---|---|
| HexabromocyclododecaneCAS 134237-50-6CAS 134237-51-7CAS 134237-52-8CAS 25637-99-4CAS 3194-55-6EC 221-695-9EC 247-148-4 | Before | Hexabromocyclododecane | 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 | 247-148-4 221-695-9 | |
| After | Hexabromocyclododecane | 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 | 247-148-4 221-695-9 | 500 mg/kg The Commission shall review that concentration limit and shall, where appropriate, adopt a legislative proposal to lower that value to not higher than 200 mg/kg no later than 30 December 2027. |
· amended · PIC Regulation Annex I, table 3, the entry for Hexabromocyclododecane
Recorded in the version in force , by Regulation (EU) 2022/643, the act that change names. The change on its version page
| Identifiers | Version | Chemical | Relevant CAS number(s) | HS code Pure substance | HS code Mixtures containing substance | Category |
|---|---|---|---|---|---|---|
| HexabromocyclododecaneCAS 134237-50-6CAS 134237-51-7CAS 134237-52-8CAS 25637-99-4CAS 3194-55-6 | Before | Hexabromocyclododecane | 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 and others | 2903.89 | Industrial | |
| After | Hexabromocyclododecane | 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 and others | ex 2903.89 | Industrial |
· amended · PIC Regulation Annex V, the entry for Hexabromocyclododecane
Recorded in the version in force , by Regulation (EU) 2022/643, the act that change names. The change on its version page
| Identifiers | Version | Description of chemicals/article(s) subject to export ban | Additional details, where relevant (e.g. name of chemical, EC No, CAS No, etc.) | |
|---|---|---|---|---|
| HexabromocyclododecaneCAS 134237-50-6CAS 134237-51-7CAS 134237-52-8CAS 25637-99-4CAS 3194-55-6EC 221-695-9EC 247-148-4 | Before | Hexabromocyclododecane | EC No 247-148-4, 221-695-9
CAS No 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 and others
CN code | |
| After | Hexabromocyclododecane | EC No 247-148-4, 221-695-9 CAS No 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 and others CN code ex29038980 | ||
· added · PIC Regulation Annex I, table 3, the entry for Hexabromocyclododecane
Recorded in the version in force , by Regulation (EU) 2020/1068, the act that change names. The change on its version page
| Identifiers | Chemical | Relevant CAS number(s) | HS code Pure substance | HS code Mixtures containing substance | Category |
|---|---|---|---|---|---|
| HexabromocyclododecaneCAS 134237-50-6CAS 134237-51-7CAS 134237-52-8CAS 25637-99-4CAS 3194-55-6 | Hexabromocyclododecane | 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 and others | 2903.89 | Industrial |
· added · PIC Regulation Annex V, the entry for Hexabromocyclododecane
Recorded in the version in force , by Regulation (EU) 2018/172, the act that change names. The change on its version page
| Identifiers | Description of chemicals/article(s) subject to export ban | Additional details, where relevant (e.g. name of chemical, EC No, CAS No, etc.) | |
|---|---|---|---|
| HexabromocyclododecaneCAS 134237-50-6CAS 134237-51-7CAS 134237-52-8CAS 25637-99-4CAS 3194-55-6EC 221-695-9EC 247-148-4 | Hexabromocyclododecane | EC No 247-148-4, 221-695-9 CAS No 25637-99-4, 3194-55-6, 134237-50-6, 134237-51-7, 134237-52-8 and others CN code 29038980 | |
Sources
- PIC Regulation: every version the record holds; rows read from EUR-Lex consolidated version 02012R0649-20261001, in force 1 October 2026 (external, EUR-Lex)
- POPs Regulation: every version the record holds; rows read from EUR-Lex consolidated version 02019R1021-20260930, in force 30 September 2026 (external, EUR-Lex)
- REACH: every version the record holds; rows read from EUR-Lex consolidated version 02006R1907-20260622, detected 11 September 2026 (external, EUR-Lex)