Reaxis®  C417VM - Dioctyltin Oxide/Silane Complex

REAXIS® C417VM, Dioctyltin Oxide + Silane, is a liquid version of dioctyltin oxide (DOTO) containing vinyltrimethoxysilane (VTMO) and is commonly used as a catalyst for silicone chemistries.  As an octyltin-based catalyst, REAXIS® C417VM is a moderately active catalyst and is ideal for use in adhesive and sealant formulations utilizing VTMO as an additive for increasing hydrolytic stability.  Other silane grades include REAXIS® C248T (DBTO+ tetraethylortho silane/TEOS) and REAXIS® C417(DOTO + TPOS). Other liquid grades are available upon request. REAXIS® C417VM is present on a wide range of international regulatory inventories, making it a great choice for multinational formula development. REAXIS® C417VM is an ideal replacement for the acetyl acetonate-based catalysts, REAXIS® C226 and REAXIS® C2013

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Technical Information

  • Product Category Organotin

  • Chemical Name Dioctyltin Oxide/Silane Complex

  • CAS Number 870-08-6

Typical Specifications

Parameter Range
Tin Content (%) 17.6 - 23.0
Density (g/ml) 1.0 - 1.2
Color (Gardner Number) 5 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


REAXIS® C417VM and its alternatives can be used as a homogeneous catalyst in a wide spectrum of silicone applications including adhesives, sealants, coatings and elastomers. 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) such as those based MS Polymer™ and SPUR+™ polymer platforms. REAXIS® C417VM is ideal for use in adhesive and sealant formulations utilizing VTMO as an additive for increasing hydrolytic stability. REAXIS® C417VM is ideal replacement for the acetyl acetonate-based catalysts, REAXIS® C226 and REAXIS® C2013 in most MS Polymer™ based formulations. 


Given its high tin content, liquid form, and good compatibility with a wide range of raw materials, REAXIS® C417VM tends to be a moderately reactive catalyst across a broad range of silicone formulations. In regard to silicone reactions, REAXIS® C417VM,  like all tin-based catalysts, will catalyze the silanol/silane condensation reaction, thus acting as both a polymerization and crosslinking catalyst. REAXIS® C417VM is hydrolytically stable within typical formulation moisture levels, but this stability tends to break down with increasing moisture content. This characteristic hydrolytic stability is enhanced given REAXIS® C417VM’s octyl nature and is typically an improvement compared to the use of similar butyl-based, like REAXIS® C248T and REAXIS® C248VM,)  and methyl-based organotin catalysts. It has been determined that the silane acts as a non-reactive diluent and thus does not affect catalyst efficiency. 

Package & Storage

  • 44 lb (20 kg) plastic pail
  • 440 lb (200 kg) steel drum
  • 2204 lb (1000 kg) IBC

REAXIS® C417VM should be stored in the original packaging at moderate temperatures. The container should be closed tightly after each use to maximize shelf life. Given the presence of a silane, hydrolytic instability could occur resulting in reduced catalytic performance. Due to the presence of VTMO, REAXIS® C417VM is classified as a flammable compound. 

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

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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