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Annex II Entry 1660 03/11/2021

Dioctyltin dilaurate; [1] stannane, dioctyl-, bis (coco acyloxy) derivs. [2]

Dioctyltin dilaurate; [1] stannane, dioctyl-, bis (coco acyloxy) derivs. [2] 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: 1660

Chemical identity and properties

PubChem 2D chemical structure for CAS 3648-18-8
CAS 3648-18-8PubChem CID 16683946

Dioctyltin dilaurate

IUPAC name
[dodecanoyloxy(dioctyl)stannyl] dodecanoate
Molecular formula
C40H80O4Sn
Molecular weight
743.8 g/mol
Exact mass
744.507864 Da
Topological polar surface area
52.6 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
4
Covalent units
1
Defined stereocentres
0

Also known as

Di-n-octyltin dilaurateTin, dioctyl-, dilaurateStannane, dioctylbis[(1-oxododecyl)oxy]-Bis(lauroyloxy)dioctylstannaneStannane, didodecanoyloxydioctyl-Stannane, dioctyldidodecanoyloxy-Di-n-octyl-zinn dilauratStannane, bis(lauroyloxy)dioctyl-
16 more reported names
Stannane, dioctylbis(lauroyloxy)-Di-n-octyl-zinn dilaurat [German]EINECS 222-883-3Stannane, bis(dodecanoyloxy)dioctyl-BRN 4043424Stannane, dioctyldi(lauroyloxy)-Stannane, dioctylbis((1-oxododecyl)oxy)-B4FA5Z1BK4EC 222-883-3RefChem:588746222-883-3DI-N-OCTYLTIN DILAURATDIOCTYLDI(LAUROYLOXY)TINDIOCTYLTIN DIDODECANOATESTANNANE, DIOCTYLBIS((1-OXODODECYL)OXYTEGOKAT 216
Open full PubChem recordPubChem annotations3D structure image
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

Dioctyltin dilaurate; [1] stannane, dioctyl-, bis (coco acyloxy) derivs. [2]

Chemical / IUPAC name

Dioctyltin dilaurate; [1] stannane, dioctyl-, bis (coco acyloxy) derivs. [2]

Regulatory information

Regulation

(EU) 2021/1902

See every entry this act set

Key data

CAS
3648-18-8 [1]; 91648- 39-4 [2]
EC
222-883-3 [1] ; 293-901-5 [2]
Annex
II
Entry number
1660

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

What Annex II means for Dioctyltin dilaurate; [1] stannane, dioctyl-, bis (coco acyloxy) derivs. [2]

Dioctyltin dilaurate; [1] stannane, dioctyl-, bis (coco acyloxy) derivs. [2] 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. Dioctyltin dilaurate; [1] stannane, dioctyl-, bis (coco acyloxy) derivs. [2] 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 3648-18-8 [1]; 91648- 39-4 [2] is the unique numerical identifier assigned to Dioctyltin dilaurate; [1] stannane, dioctyl-, bis (coco acyloxy) derivs. [2] 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 Dioctyltin dilaurate; [1] stannane, dioctyl-, bis (coco acyloxy) derivs. [2]

This page summarizes one Annex II record for Dioctyltin dilaurate; [1] stannane, dioctyl-, bis (coco acyloxy) derivs. [2] 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 Dioctyltin dilaurate; [1] stannane, dioctyl-, bis (coco acyloxy) derivs. [2], but confirm any final regulatory decision against the current official annex wording and source files.

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