Dioctyl tin compounds

Dioctyltin compounds (abbreviated DOT after English dioctyltin ) are organometallic compounds of tin with two octyl groups (–C ₈ H ₁₇ ).

presentation

Dialkyltin chlorides can be obtained by reacting tetraorganotin compounds with tin halides through comproportionation :

${\displaystyle \mathrm {R_{4}Sn+2\ SnCl_{4}\longrightarrow R_{2}SnCl_{2}+2\ R-SnCl_{3}} }$

Most other organotin compounds can be prepared from the alkyltin halides, e.g. B. alkyl tin hydroxides, oxides and hydrides.

use

Like dimethyltin and dibutyltin compounds, dioctyltin compounds (especially dioctyltin halides) serve to stabilize polyvinyl chloride with heat and light and are used as catalysts in polyurethane production.

According to a decision of the EU from 2009, dioctyltin compounds may no longer be used in the products listed below from January 1, 2012 if the concentration of tin in the product or in parts thereof exceeds 0.1% by weight:

• Textile articles intended to come into contact with the skin;
• Gloves;
• Shoes or parts thereof that are intended to come into contact with the skin;
• Wall and floor coverings;
• Baby items;
• Feminine hygiene articles;
• Diapers;
• Two-component room temperature vulcanization impression sets (RTV-2 impression sets)

Representative

• Dioctyl tin oxide
• Dioctyltin dichloride
• Dioctyltin dilaurate
• Dioctyl tin maleate
• Dioctyltin dithioglycolate
• Dioctyl tin diacetate
• Dioctyl tin carboxylate

Web links

• Concise International Chemical Assessment Document (CICAD) for Mono- and disubstituted methyltin, butyltin and octyltin compounds (PDF)

Individual evidence

1. ↑ Entry on organic tin compounds. In: Römpp Online . Georg Thieme Verlag, accessed on October 12, 2014.
2. ↑ Günter Fred Fuhrmann: Toxicology For Natural Scientists: Introduction to Theoretical and Special Toxicology . Springer-Verlag, 2006, ISBN 978-3-8351-9010-8 , pp. 318 ( limited preview in Google Book search).
3. ↑ BfR: Organotin Compounds in Consumer Products - Updated BfR Opinion No. 034/2011 of August 2, 2011. BfR , accessed on October 12, 2014 (PDF; 61 kB).