Overview
REAXIS® C188 (Stannous Oxide), commonly referred to by its formula of SnO and frequently called Tin(II) Oxide, is a high metal content inorganic stannous tin catalyst that is used in a wide range of esterification reactions. REAXIS® C188 is manufactured with low stannic tin content while maximizing active stannous tin. REAXIS® C188 is an ideal alternative for commonly used organotin catalysts such as REAXIS® C248 (Dibutyltin oxide) and monobutyltin oxide.
Stannous Oxide has a lower toxicity profile when compared to organotins given its inorganic tin composition. REAXIS® C188 is supplied as a free-flowing white solid Stannous Oxide substance with a narrow particle size distribution range and low moisture content. Similar inorganic tin products to REAXIS® C188 include, REAXIS® C162 (Stannous Chloride Anhydrous), REAXIS® C129 (Stannous Octoate) and REAXIS® C160 (Stannous Oxalate). REAXIS® C188 is present on most international regulatory lists, making it an ideal choice when developing global formulations.
Technical Information
- Product Category Inorganic Tin
- Chemical Name Stannous Oxide
- CAS Number 21651-19-4
Typical Specifications
| Parameter | Range |
|---|---|
| Stannous Tin (%) | 85.2 Min |
| Tin (IV) Content (%) | 0.7 Max |
International Regulatory Listings
- TSCA (US) Yes
- DSL (Canada) Yes
- AICS (Australia) Yes
- KECI (South Korea) Yes
- IECSC (China) Yes
- ENCS (Japan) Yes
- TCSI (Taiwan) Yes
- NZloC (New Zealand) Yes
- PICCS (The Philippines) Yes
- NDSL (Canada) No
- REACH (EU) No
Applications
REAXIS® C188 is primarily used as a homogeneous catalyst for synthesizing various monomeric and polymeric ester-based products such as nonionic surfactants, polyester polyols, and plasticizers. Typical end-use markets for Stannous Oxide include plastics, coatings, glass compounds, and personal care. Its inorganic tin nature makes it an ideal catalyst for applications demanding the use of low-toxicity raw materials.
Reactivity
Due to its high tin concentration and small ligand, REAXIS® C188, Stannous Oxide is a very active esterification catalyst with comparable reactivity to common organotin catalysts such as dibutyl and monobutyl tin oxides. Given its inorganic tin nature, Stannous Oxide is stable at the high reaction temperatures typical of many esterification reactions. Also, the use of REAXIS® C188 can result in final ester products with low color.
Package & Storage
- 55 lb (25 kg) pail
REAXIS® C188 should be stored in the original packaging. The container should be closed tightly after each use to maximize shelf life. Characteristic of most inorganic tins (Sn(II)), the primary cause of instability would be oxidation.
Safety and Handling
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Hazard Classification (US SDS)
| Section | Hazard Class | Category | Hazard Statement |
|---|---|---|---|
| A.10 | acute toxicity (oral) | 4 | H302 |
| A.3 | serious eye damage/eye irritation | 2 | H319 |
| A.4S | skin sensitization | 1 | H317 |
| A.9 | specific target organ toxicity - repeated exposure | 1 | H372 |
Hazard Pictograms (US SDS)
Transportation Information (US SDS)
| DOT | IMDG | ICAO | Environment Hazard | |
|---|---|---|---|---|
| UN Number | not subject to transport regulations | not subject to transport regulations | not subject to transport regulations | non-environmentally hazardous acc. to the dangerous goods regulations |
| UN Proper Shipping Name | not relevant | not relevant | not relevant | |
| Transport Class | none | none | none | |
| Packing Group | not assigned | not assigned | not assigned | |
Primary Composition Substance(s)
- Tin(II) oxide
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This information is provided to the best of our knowledge but without obligation. Reaxis is not liable for any incorrect or missing information. This data sheet becomes invalid upon publication of a new version. Please contact us for the latest version.
