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Reaxis®  C248DN - Dibutyltin Oxide/Plasticizer Blend

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Overview

REAXIS® C248DN (Dibutyltin Oxide + Plasticizer) is a liquid version of dibutyltin oxide (DBTO) containing a non-phthalate-based plasticizer.  REAXIS® C248DN contains 35% of the active tin content compared to the solid version of DBTO, REAXIS® C248. Other liquid versions using phthalates as the diluent include REAXIS® C248D, which includes a plasticizer and a relatively high tin content, and REAXIS® C248DP, which contains a plasticizer and lower tin content. Liquid versions of DBTO-based silanes include REAXIS® C248T, which contains a silane complex, and REAXIS® C248VM, which is another variant of our DBTO and silane compound. Other liquid grades of dibutyltin oxide are available upon request. 

Technical Information

  • Product Category Organotin

  • Chemical Name Dibutyltin Oxide/Plasticizer Blend

  • CAS Number 818-08-6

Typical Specifications

Parameter Range
Color (Gardner Number) 4 Max
Density (g/ml) 1.0 - 1.2
Viscosity (cP @ 20°C) 500 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® C248DN and its alternatives can be used as a homogenous tin catalyst in a wide spectrum of silicone applications including adhesives & sealants and coatings. 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).  REAXIS® C248DN is used commonly with formulations based on SMP resins such as MS Polymer®. REAXIS® C248DP is on a broad range of international regulatory lists and is thus an ideal candidate for global formulation development. 

Reactivity

Given its high tin content, liquid form, small ligand, and good compatibility with a wide range of raw materials, REAXIS® C248DN tends to be a highly reactive catalyst across a broad range of silicone formulations. In regard to silicone reactions, REAXIS® C248DN, like all tin-based catalysts, will catalyze the silanol/silane condensation reaction, thus acting as both a polymerization and crosslinking catalyst. In addition to reactivity, REAXIS® C248DN is more hydrolytically stable toward condensation-generated moisture. Reactivity-wise, REAXIS® C248D, REAXIS® C226, and REAXIS® C248DP would be similar.

Package & Storage

  • 20kg (44lb) Pails
  • 200kg (440lb) Drums

REAXIS® C248DN should be stored in the original packaging at moderate temperatures. The container should be closed tightly after each use to maximize shelf life.

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 reaxis.com, contacting your local representative, or emailing direct to techservices@reaxis.com.

Hazard Classification (US SDS)

Section Hazard Class Category Hazard Statement
A.10 acute toxicity (oral) 4 H302
A.2 skin corrosion/irritation 2 H315
A.3 serious eye damage/eye irritation 1 H318
A.4S skin sensitization 1 H317
A.5 germ cell mutagenicity 2 H341
A.7 reproductive toxicity 1B H360
A.8 specific target organ toxicity - single exposure 1 H370
A.9 specific target organ toxicity - repeated exposure 1 STOT 1 H372

Hazard Pictograms (US SDS)

corrosion
environment
exclamation_mark
health_hazard

Transportation Information (US SDS)

DOT IMDG ICAO Environment Hazard
UN Number UN 3082 UN 3082 UN 3082 hazardous to the aquatic environment
Un Proper Shipping Name Environmentally hazardous substance, liquid, n.o.s. ENVIRONMENTALLY HAZARDOUS SUBSTANCE, LIQUID, N.O.S. Environmentally hazardous substance, liquid, n.o.s.
Transport Class 9 9 9
Packing Group lll lll lll

Primary Composition Substance(s)

  • dibutyl tin oxide

Alternative Product(s) to Consider

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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.