Reaxis®  C314 - Dioctyltin bis-(2-ethylhexyl maleate)

REAXIS® C314, also known as (Dioctyltin bis-2-ethylhexyl maleate,) is a member of the dialkyl family of organotins. As an octyltin carboxylate with a unique ligand, REAXIS® C314 is characterized by an improved hydrolytic stability and lower toxicity versus its dibutyl -based analogue, REAXIS® C317. REAXIS® C314 is primarily used as a Lewis Acid -based homogeneous catalyst in a wide range of silicone (condensation reactions) and polyurethane applications. Similar products would include, REAXIS® C216 (Dioctyltin Dilaurate), REAXIS® C318 (Dioctyltin Dineodecanoate) and REAXIS® C228 (Dioctyltin Diacetate). REAXIS® C314 is present on most international regulatory lists including US TSCA and Canada DSL.

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Technical Information

  • Product Category Organotin

  • Chemical Name Dioctyltin bis-(2-ethylhexyl maleate)

  • CAS Number 10039-33-5

Typical Specifications

Parameter Range
Tin Content (%) 15.4 Max
Color (Gardner Number) 3 Max
Viscosity (cP @ 20°C) 400 Max
Density (g/ml) 1.08 - 1.11
Water Content (%) 0.5 Max

International Regulatory Listings

  • TSCA (US) Yes

  • DSL (Canada) Yes

  • AICS (Australia) Yes

  • IECSC (China) Yes

  • ENCS (Japan) Yes

  • TCSI (Taiwan) Yes

  • NZloC (New Zealand) Yes

  • PICCS (The Philippines) Yes

  • NDSL (Canada) No

  • REACH (EU) No

  • KECI (South Korea) No


REAXIS® C314 and its alternatives can be used as a homogenous catalyst in a wide spectrum of silicone and polyurethane applications including adhesives, sealants, coatings, plastics, and foams.  Silicone-based applications include: acetoxy-, ethoxy- and oxime-based Room Temperature Vulcanizing (RTV) adhesives and sealants, polyethylene crosslinked silanes (PEX), and select silane modified polymers (SMPs).  As a polyurethane catalyst, REAXIS® C314 is a suitable catalyst for a wide range of aromatic isocyanate-based formulations, specifically those used in adhesives, sealants, and elastomers. 


As an octyl tin with large ligand, the reactivity of REAXIS® C314 is best characterized as balanced, with moderate front and back-end reactivity in both silicone and polyurethane applications.  REAXIS® C314 is a good catalyst for applications requiring moderate front-end reactivity or require a gradual curing process, such as coatings, adhesives, sealants, and elastomers.  In regard to silicone reactions, REAXIS® C314 will catalyze the silanol/silane condensation reaction, acting as both a polymerization and crosslinking catalyst. As a polyurethane catalyst, REAXIS® C314 will more selectively  catalyze the isocyanate-polyol reaction in addition to some catalysis of the water reaction. Thus, in polyurethanes, REAXIS® C314 acts as a polymerization and gelation catalyst.  If a catalyst with a higher reactivity is required, the butyl analogue, REAXIS® C317, is recommended. To a limited extent, reactivity can be controlled via adjusting the dosing concentration.  







Package & Storage

  • 44 lb (20 kg) plastic pail
  • 485 lb (220 kg) plastic drum

REAXIS® C314 should be stored in the original packaging at moderate temperatures and kept from freezing. The container should be closed tightly after each use to maximize shelf life. Characteristic of most Sn (IV) organotins, the primary cause of instability would be hydrolysis. Hydrolysis results in the formation of tin oxide insolubles leading to deactivation of REAXIS® C314.

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

Hazard Classification (US SDS)

Section Hazard Class Category Hazard Statement
A.2 skin corrosion/irritation 2 H315
A.3 serious eye damage/eye irritation 2 H319
A.4S skin sensitization 1 H317
A.7 reproductive toxicity 2 H361
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 not assigned not assigned not assigned
Packing Group not assigned not assigned not assigned

Primary Composition Substance(s)

  • Dioctyltin bis(2-ethylhexyl maleate)

Alternative Product(s) to Consider

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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