Tin (II, IV) oxide

General
Surname	Tin (II, IV) oxide
other names	Tin sesquioxide
Molecular formula	Sn 2 O 3
External identifiers / databases
CAS number 12169-15-2 Wikidata Q204983
properties
Molar mass	285.4 g · mol -1
Physical state	firmly
density	5.9 g cm −3
safety instructions
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Tin (II, IV) oxide (also tin sesquioxide ) is a metastable compound consisting of tin and oxygen . It has the sum formula Sn ₂ O ₃ .

properties

Tin sesquioxide is a white-yellow solid. Above approx. 400 ° C, Sn ₂ O ₃ disproportionates to form metallic tin and tin (IV) oxide.

${\displaystyle \mathrm {2\ Sn_{2}O_{3}{\xrightarrow {\Delta T}}\ Sn+3\ SnO_{2}} }$

Manufacturing

The only known manufacturing process is the disproportionation at low temperatures of specially manufactured tin (II) oxide (SnO) to tin, tin (IV) oxide (SnO ₂ ) and tin sesquioxide.

${\displaystyle \mathrm {5\ SnO\longrightarrow 2\ Sn+\ Sn_{2}O_{3}+\ SnO_{2}} }$

The metallic tin can then be separated by chemical reaction, so that a mixture of Sn ₂ O ₃ and SnO ₂ remains.

Individual evidence

1. ↑ G. Murken, M. Trom: About the tin oxide, Sn ₂ O ₃ , formed during the disproportionation of SnO , in: Z. anorg. allg. Chem. 1973 , 397 , 117-126.
2. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.