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Annex II Entry 1648 21/06/2021

Benzo[rst]pentaphene

Benzo[rst]pentaphene is listed in Annex II as a prohibited substance for cosmetic products placed on the EU market.

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Prohibited substance— Annex II, EU Regulation 1223/2009
Entry: 1648

Chemical identity and properties

PubChem 2D chemical structure for CAS 189-55-9
CAS 189-55-9PubChem CID 9106

Dibenzo(a,i)pyrene

Dibenzo[a,i]pyrene is an ortho- and peri-fused polycyclic arene. — ChEBI

IUPAC name
hexacyclo[10.10.2.02,7.09,23.014,19.020,24]tetracosa-1(23),2,4,6,8,10,12,14,16,18,20(24),21-dodecaene
Molecular formula
C24H14
Molecular weight
302.4 g/mol
Exact mass
302.109550447 Da
XLogP3
7.3
Topological polar surface area
0.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
0
Covalent units
1
Defined stereocentres
0

Also known as

Benzo[rst]pentapheneDibenzo[a,i]pyreneBenzo(rst)pentapheneDibenzo(b,h)pyreneDB(a,i)P3,4:9,10-Dibenzopyrene1,2:7,8-DibenzpyreneDibenz(a,i)pyrene
16 more reported names
Dibenz[a,i]pyrene1,2,7,8-DibenzopyreneRCRA waste number U0643,4:9,10-Dibenzpyrene7FMI112D18NSC-875213,4,9,10-Dibenzpyrene3,4-9,10-dibenzopyreneRefChem:132808205-877-5NSC 87521Benzo(r,s,t)pentaphene3,4,9,10-DibenzopyreneCCRIS 214HSDB 4027EINECS 205-877-5
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External database identifiers

Retrieved from NIH PubChem on 2026-09-02 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Record details

Chemical name

Benzo[rst]pentaphene

Chemical / IUPAC name

Benzo[rst]pentaphene

Regulatory information

Regulation

(EU) 2021/850

See every entry this act set

Key data

CAS
189-55-9
EC
205-877-5
Annex
II
Entry number
1648

Direct matches are limited for this record, so nearby entries from Annex II are shown as well.

Annex II 1645
Nearby record in the same annex

Cobalt

CAS: 7440-48-4
EC: 231-158-0

What Annex II means for Benzo[rst]pentaphene

Benzo[rst]pentaphene is listed as a prohibited substance under Annex II of EU Cosmetics Regulation 1223/2009 and must not be intentionally added. Article 17 separately addresses unintended small quantities that are technically unavoidable under good manufacturing practice and compatible with the Article 3 safety requirement.

Formulators must screen their ingredients and raw materials to ensure none contain this substance. Suppliers should provide documentation confirming absence when requested.

The page also surfaces 12 related annex records with overlapping identifiers, annex logic or naming patterns.

Compliance checklist

  • Verify this substance is absent from all raw materials and finished formulations.
  • Request absence confirmation or CoA from raw material suppliers.
  • Document the screening result in the Product Information File (PIF).

Frequently asked questions

Yes. Benzo[rst]pentaphene is listed in Annex II of EU Cosmetics Regulation 1223/2009 and is prohibited as an intentionally added cosmetic ingredient. Article 17 provides a narrow exception for unintended small quantities that are technically unavoidable under good manufacturing practice, provided the product remains safe under Article 3.

CAS 189-55-9 is the unique numerical identifier assigned to Benzo[rst]pentaphene by the Chemical Abstracts Service. In cosmetic compliance work, the CAS number is used to cross-reference the substance across regulatory databases, raw material specifications and safety assessment reports. Multiple EU annex entries may share the same CAS number if the same substance appears under different conditions or in different annexes.

Use the INCI Checker tool on this site to paste your full ingredient list (INCI) and scan it against all Annex II–VI entries. The tool highlights any ingredients that match restricted, prohibited or allergen-flagged records. This is useful for rapid compliance screening of finished product formulas or raw material declarations.
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Source note for Annex II record Benzo[rst]pentaphene

This page summarizes one Annex II record for Benzo[rst]pentaphene from public European Commission cosmetic materials and adds linked inventory or identifier matches when available.

Use this record page to review Annex II conditions for Benzo[rst]pentaphene, but confirm any final regulatory decision against the current official annex wording and source files.

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