FASCAT® 4000 Series

ProductChemical Name(s)Acronmym(s) or AbbreviationsCAS#EC#Molecular FormulaDescriptionChemical Structure
FASCAT® 4100Monobutyltin oxide / Monobutyltin hydroxide oxide / Butyl stannoic acid MBTO / BSA2273-43-0218-880-1C4H10O2SnAmorphous white solid with several esterification uses:
• synthesis of saturated polyester resins for powder coatings and coil coatings
• production of unsaturated polyester resins for gel-coat, sheet molding, and cast molding applications
• used to produce polymeric plasticizers.
FASCAT® 4100 is an extremely pure butylstannoic acid, offering industry leading low levels of dibutyltin and tributyltin species.
FASCAT® 4101Monobutyltin dihydroxychloride13355-96-9236-406-1C4H11ClO2SnAmorphous white solid used in the synthesis of saturated polyester resins for powder coatings. Other uses include:
• production of unsaturated polyester resins for gel coat, sheet molding, and cast molding applications
• in transesterification reactions run at temperatures between 140-180°C to produce esters and anti-oxidants
• in the production of PBT engineering resins for the automotive and construction markets
FASCAT® 4102Monobutyltin tris(2-ethylhexanoate)23850-94-4245-912-1C28H54O6SnPale yellow liquid used in the synthesis of saturated polyester resins for powder coatings and coil coatings. Other uses include:
• the production of aromatic polyester polyols for flexible and rigid PU foam applications
• in ring opening polymerization for polymer production
• in the preparation of plasticizers, including dioctyl phthalate
• in transesterification reactions, with good catalytic activity at temperatures ranging from 80C to 150C
FASCAT® 4200Dibutyltin diacetateDBTA / DBTDA1067-33-0213-928-8C12H24O4SnClear, colorless to pale yellow liquid with multiple uses:
• in silanol condensation reactions for caulk and sealant applications
• in the production of blocked isocyanates for urethane coatings that are used in the automotive OEM market
• to cross-link urethane coating systems for both the automotive and industrial coatings markets
• transesterification of esters for the antioxidant and synthetic lubricant markets
FASCAT® 4201Dibutyltin oxideDBTO818-08-6212-449-1C8H18OSnAmorphous white solid tailored to the demanding specification of aqueous cathodic electrodeposition of urethane coatings for automotive and industrial applications. Other uses include:
• transesterification catalyst for methacrylate esters that are used in the water treatment market
• high temperature transesterification reactions for the production of coating resins for the preparation of alkyd resins

Click here for a Product Stewardship Summary on FASCAT® 4201
FASCAT® 4202Dibutyltin dilaurateDBTL / DBTDL77-58-7201-039-8C32H64O4SnYellow amber, oily liquid that is the industry standard for coatings, adhesives, solvents and elastomers (CASE) applications:
• used to cross-link two-component urethane coating systems for the automotive, industrial, and refinish coatings
• to cross-link RTV silicone systems for the caulkand sealants market
• to cross-link polyethylene/silane (PEX) co-polymer systems for the wire and cable industry
• absorbed on silica, is used to cross-link urethane powder coatings for exterior applications
• used as a gelling catalyst in the manufacture of flexible and rigid polyurethane foams, coatings, adhesives, sealants and elastomers
FASCAT® 4208XDibutyltin bis(2-ethylhexanoate) in xylene (50 wt%)2781-10-4220-481-2C24H48O4SnWhite to straw liquid used in silanol condensation reactions for caulk and sealant applications and in the production of silicones.
FASCAT® 4210Dibutyltin dichlorideDBTC683-18-1211-670-0C8H18Cl2SnWhite crystalline solid with several uses:
• an intermediate for producing dibutyltin compounds
• a precursor for glass coating
• a reactive additive for modification of synthetic rubber, such as polybutadiene, thereby improving carbon black dispersibility into the compound
FASCAT® 4224Dibutyltin bis(1-thioglyceride)68298-38-4269-561-9C14H32O4S2SnClear light colored liquid highly selective for polyurethane systems. Exhibits hydrolytic stability found to be useful in waterborne coatings and adhesives. Applications may include formulations when the adhesive or coating needs long pot life at room temperature, but would cure quickly at elevated temperatures such as a hot mold or oven.
FASCAT® 4233Butyltin mercaptide (Proprietary)ProprietaryProprietaryProprietaryLight amber oily liquid used in CASE applications, namely the synthesis and curing of polyurethanes. May provide more of a delayed action cure compared to organotin carboxylates such as FACAT® 4202.Proprietary
FASCAT® 4350Butyltin oxide (Proprietary)ProprietaryProprietaryProprietaryAmorphous white powder specifically designed for use in the preparation of alkyd resins in alcoholosis and esterification steps. Catalyst effectiveness has been shown in a number of short, medium, and long oil alkyds prepared from fusion and solvent processes. When used at concentrations of 0.03% to 0.04% by weight of total oil, this catalyst has demonstrated a reduction of 20% to 25% in reaction time as well as improved color and haze. Viable alternative to lithium catalyzed systems.Proprietary
FASCAT® 4351Triphenyltin hydroxideTPTH76-87-9200-990-6C18H16OSnWhite powder used as a fungicide for potatoes, sugar beets, and pecans.
FASCAT® 4352TriphenylphosphineTPP603-35-0210-036-0C18H15PWhite to light tan flaked solid with a mild odor, with a variety of uses:
• widely used in the synthesis of organic and organometallic compounds
• used in the synthesis of biaryl compounds
• common reactions include the Suzuki reaction, Wittig reaction, Mitsunobu reaction, and Appel reaction
• used for deoxegenation of organic peroxides
FASCAT® 4400Tin tetrachlorideTintet7646-78-8231-588-9Cl4SnClear to yellow, fuming liquid utilized in chloromethylation and reaction of epichlorohydrin with alcohols to form glycidyl ethers.
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