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Annex II Entry 1658 03/11/2021

Silicon carbide fibres (with diameter < 3 μm, length > 5 μm and aspect ratio ≥ 3:1)

Silicon carbide fibres (with diameter < 3 μm, length > 5 μm and aspect ratio ≥ 3:1) 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: 1658

Chemical identity and properties

PubChem 2D chemical structure for CAS 409-21-2
CAS 409-21-2PubChem CID 9863

Silicon carbide

Silicon carbide is an organosilicon compound. — ChEBI

IUPAC name
methanidylidynesilanylium
Molecular formula
CSi
Molecular weight
40.096 g/mol
Exact mass
39.976926534 Da
Topological polar surface area
0.0 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
1
Covalent units
1
Defined stereocentres
0

Also known as

CarborundumSilicon monocarbideCrystarBetarundumCarborundeumTokawhiskerCarbolonNicalon
16 more reported names
SilundumSilicon carbide (SiC)Carbon silicideGreen densicCarbofrax MBetarundum UFAnnanox CKBetarundum ST-SCrystolon 37Crystolon 39Betarundum ultrafineHitaceram SC 101SC 9 (Carbide)Densic C 500Green densic GC 800KZ 3M
Open full PubChem recordPubChem annotations3D structure image
External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Record details

Chemical name

Silicon carbide fibres (with diameter < 3 μm, length > 5 μm and aspect ratio ≥ 3:1)

Chemical / IUPAC name

Silicon carbide fibres (with diameter < 3 μm, length > 5 μm and aspect ratio ≥ 3:1)

Regulatory information

Regulation

(EU) 2021/1902

See every entry this act set

Key data

CAS
409-21-2; 308076-74-6
EC
206-991-8; -
Annex
II
Entry number
1658

Inventory links for Silicon carbide fibres (with diameter < 3 μm, length > 5 μm and aspect ratio ≥ 3:1)

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

What Annex II means for Silicon carbide fibres (with diameter < 3 μm, length > 5 μm and aspect ratio ≥ 3:1)

Silicon carbide fibres (with diameter < 3 μm, length > 5 μm and aspect ratio ≥ 3:1) 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.

This record is linked to 1 CosIng inventory ingredient for name and identifier cross-reference. 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. Silicon carbide fibres (with diameter < 3 μm, length > 5 μm and aspect ratio ≥ 3:1) 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 409-21-2; 308076-74-6 is the unique numerical identifier assigned to Silicon carbide fibres (with diameter < 3 μm, length > 5 μm and aspect ratio ≥ 3:1) 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 Silicon carbide fibres (with diameter < 3 μm, length > 5 μm and aspect ratio ≥ 3:1)

This page summarizes one Annex II record for Silicon carbide fibres (with diameter < 3 μm, length > 5 μm and aspect ratio ≥ 3:1) 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 Silicon carbide fibres (with diameter < 3 μm, length > 5 μm and aspect ratio ≥ 3:1), but confirm any final regulatory decision against the current official annex wording and source files.

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