Tin(ii) oxide
CAS 21651-19-4
EC 244-499-5
Formula OSn
MW 134.71 g/mol
Catalysts & Catalyst Precursors Plastics & Polymers Catalysis
Description
Tin(II) Oxide (CAS 21651-19-4) is an inorganic tin compound with the formula OSn, also known commercially as Tin Monoxide and Tegokat 188. It carries no E-code designation and is classified under EC number 244-499-5. It is distinct from tin(IV) oxide and represents tin in its divalent oxidation state.
In plastics and polymer processing, Tin(II) Oxide functions as a catalyst and catalyst precursor, particularly in polyurethane and polyester synthesis where it promotes condensation and transesterification reactions. It also serves as a precursor to organotin catalyst systems, where controlled oxidation or reaction with organic acids generates the active catalytic species in situ.
Tin(II) Oxide is supplied as a black crystalline powder and is subject to REACH registration requirements for European procurement. Buyers should confirm supplier SDS documentation and substance registration status prior to import. Standard packaging formats vary by supplier; consult our technical team for available quantities and grades.
In plastics and polymer processing, Tin(II) Oxide functions as a catalyst and catalyst precursor, particularly in polyurethane and polyester synthesis where it promotes condensation and transesterification reactions. It also serves as a precursor to organotin catalyst systems, where controlled oxidation or reaction with organic acids generates the active catalytic species in situ.
Tin(II) Oxide is supplied as a black crystalline powder and is subject to REACH registration requirements for European procurement. Buyers should confirm supplier SDS documentation and substance registration status prior to import. Standard packaging formats vary by supplier; consult our technical team for available quantities and grades.
Physical Properties
| Melting Point | 1080 °C |
| Density | 6.45 g/cm³ |
| Appearance | black crystals with a characteristic odour |
| Color | Blue-black |
| Form | powder |
| Water Solubility | Insoluble in water, and alcohol. |
Safety & Handling (Learn More)
Danger GHS07 GHS08
H
H302H317H319H372
P
P260P261P264P270P272P280P319P321P330P501P264+P265P301+P317P302+P352P333+P317P337+P317P362+P364P305+P351+P338
Trade & Regulatory
| HS Code | 28259085 |
| Storage Class | 6.1C - Combustible acute toxic Cat.3 toxic compounds or compounds which causing chronic effects |
| WGK (Germany) | 3 |
Other Names
oxotintin protoxidestannous oxideSnOtin(ii)TIN OXIDETegokat 188
Related Products
Raw Materials
Derivatives
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