Reaxis®  C160 - Stannous Oxalate

REAXIS® C160 (Stannous Oxalate or Tin(II) Oxalate) is a high metal content inorganic tin catalyst that is used in a wide range of esterification reactions. Tin(II) Oxalate is an ideal alternative for commonly used organotin catalysts such as REAXIS® C248 (Dibutyltin Oxide) and monobutyltin oxide. REAXIS® C160 has a lower toxicity profile compared to organotins. REAXIS® C160 is supplied as a free-flowing white solid with a narrow particle size distribution range and low moisture content. Similar inorganic tin products to REAXIS® C160 include, REAXIS® C162 (Stannous Chloride Anhydrous), REAXIS® C129 (Stannous Octoate), and REAXIS® C125 (Stannous Neodecanoate).

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Technical Information

  • Product Category Inorganic Tin

  • Chemical Name Stannous Oxalate

  • CAS Number 814-94-8

Typical Specifications

Parameter Range
Stannous Tin (%) 55.5 - 57.5
Tin (IV) Content (%) 0.5 Max
Loss On Drying (%) 2.0 Max

International Regulatory Listings

  • TSCA (US) Yes

  • DSL (Canada) Yes

  • REACH (EU) Yes

  • AICS (Australia) Yes

  • KECI (South Korea) Yes

  • IECSC (China) Yes

  • ENCS (Japan) Yes

  • TCSI (Taiwan) Yes

  • NZloC (New Zealand) Yes


REAXIS® C160 is primarily used as a catalyst for synthesizing various monomeric and polymeric ester-based products such as nonionic surfactants, polyester polyols, and plasticizers. Typical end-use markets for REAXIS® C160 include plastics, coatings, and personal care. Its inorganic tin nature makes it an ideal catalyst for applications demanding the use of low-toxicity raw materials.


Due to its high tin concentration and small ligand, REAXIS® C160 (Stannous Oxalate) is a very active esterification catalyst with comparable reactivity to common organotin catalysts such as dibutyl and monobutyl tin oxides.  Given its inorganic nature, REAXIS® C160 is stable at high reaction temperatures typical of many esterification reactions. Also, the use of REAXIS® C160 can result in final ester products with low color. 

Package & Storage

  • 55 lb (25 kg) plastic pail

REAXIS® C160 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

Before use of Reaxis products please refer to the relevant Safety Data Sheet (SDS) for safety and toxicological data as well as for the information on proper transportation, storage, and use. SDSs are available by request via our web site, contacting your local representative, or emailing direct to

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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.

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