PHOSFLEX T-BEP

Phosflex T-BEP is a low-viscosity trialkyl phosphate ester based on Tris(2-butoxyethyl) Phosphate.

Phosflex T-BEP functions as a leveling agent, plasticizer, low-temperature softener, antifoaming agent, and phosphorus-containing formulation additive.

Phosflex T-BEP combines efficient plasticization, excellent low-temperature performance, controlled flow, and compatibility with selected wax, coating, rubber, and resin systems.

CAS Number: 78-51-3

EC Number: 201-122-9

Molecular Formula: C₁₈H₃₉O₇P

Molecular Weight: 398.47 g/mol

SYNONYMS

Phosflex T-BEP, PHOSFLEX T-BEP, PHOSFLEX® T-BEP, Phosflex® T-BEP, Phosflex T BEP, Phosflex TBE-P, Phosflex 176C, Tris(2-butoxyethyl) Phosphate, Tris(2-butoxyethyl)phosphate, Tri(2-butoxyethyl) Phosphate, Tri-2-butoxyethyl Phosphate, Tris(butoxyethyl) Phosphate, Tris(butoxyethyl)phosphate, Tributoxyethyl Phosphate, Tributoxyethylphosphate, Tributyl Cellosolve Phosphate, Tributyl Cellosolve Phosphoric Acid Ester, Phosphoric Acid Tris(2-butoxyethyl) Ester, Phosphoric Acid Tri(2-butoxyethyl) Ester, Phosphoric Acid Tributoxyethyl Ester, Ethanol, 2-Butoxy-, Phosphate (3:1), Ethanol, 2-Butoxy-, 1,1′,1″-Phosphate, 2-Butoxyethanol Phosphate, Tri(2-butoxyethanol) Phosphate, Tris(2-n-butoxyethyl) Phosphate, Tris(Butylglycol) Phosphate, Tris[2-(butyloxy)ethyl] Phosphate, TBOEP, TBEP, TBOP, TBXP, KP-140, KP 140, Kronitex KP-140, Amgard TBEP, Hostaphat TBEP, Hostaphat TBEP HQ, Hostaphat B 310, Butoxyethyl Phosphate Ester, Trialkyl Phosphate Ester, Low-Viscosity Phosphate Plasticizer, Phosphate Ester Leveling Agent, Floor-Polish Leveling Agent, Wax Leveling Agent, Paper-Coating Leveling Agent, Chlorinated-Rubber Plasticizer, Nitrile-Rubber Plasticizer, Rubber Low-Temperature Softener, Ore-Beneficiation Antifoaming Agent, Phosphate Ester Defoamer, Phosphorus-Containing Plasticizer, CAS 78-51-3, EC 201-122-9, EINECS 201-122-9, UNII RYA6940G86, PubChem CID 6540, DTXSID5021758, CHEBI 35038, MFCD00009456, C₁₈H₃₉O₇P

APPLICATIONS

Phosflex T-BEP serves as a leveling agent in floor-polish formulations designed to produce smooth and uniform protective films.
Phosflex T-BEP improves spreading across resilient flooring by reducing surface defects caused by uneven liquid distribution.

Phosflex T-BEP supports acrylic floor finishes that require controlled flow before water and other volatile components evaporate.
Phosflex T-BEP helps freshly applied floor finishes develop a continuous appearance with fewer streaks, brush marks, and localized thickness variations.

Phosflex T-BEP contributes to styrene-acrylic floor-polish emulsions requiring a balance between hardness and film flexibility.
Phosflex T-BEP promotes controlled film formation when Phosflex T-BEP remains compatible with the polymer dispersion, wax package, and surfactant system.

Phosflex T-BEP functions in dry-bright floor finishes intended to develop gloss without intensive mechanical polishing.
Phosflex T-BEP improves the ability of the wet finish to redistribute before the polymer phase forms a durable surface layer.

Phosflex T-BEP facilitates floor-care formulations for institutional, commercial, and industrial maintenance programs.
Phosflex T-BEP allows formulators to balance application flow, gloss development, film flexibility, and resistance to visible coating irregularities.

Phosflex T-BEP serves as a leveling and softening agent in wax formulations used for surface protection and appearance modification.
Phosflex T-BEP helps compatible wax systems spread more uniformly across flooring, coated materials, furniture surfaces, and industrial substrates.

Phosflex T-BEP supports emulsion waxes containing polymers, surfactants, dispersed wax particles, and water-soluble formulation auxiliaries.
Phosflex T-BEP contributes to film continuity by improving interaction between the dispersed wax phase and the surrounding formulation.

Phosflex T-BEP functions in solvent-containing wax systems requiring a low-viscosity phosphate ester with low volatility.
Phosflex T-BEP provides sufficient working time for the applied wax layer to level before the formulation reaches its final dry state.

Phosflex T-BEP contributes to paper coatings that require improved surface flow and uniform binder distribution.
Phosflex T-BEP helps coating formulations spread across paper and paperboard without producing excessive localized accumulation.

Phosflex T-BEP supports coated-paper applications in which flexibility, surface appearance, and controlled film formation are important.
Phosflex T-BEP can improve coating uniformity when Phosflex T-BEP is compatible with the selected latex, pigment, filler, and additive system.

Phosflex T-BEP functions as an antifoaming agent in ore-beneficiation and mineral-processing operations.
Phosflex T-BEP reduces persistent foam that can interfere with pumping, separation, flotation control, and effective process-vessel capacity.

Phosflex T-BEP supports mineral-processing circuits containing collectors, frothers, surfactants, and finely divided mineral solids.
Phosflex T-BEP helps control unwanted foam without functioning as the primary collector or mineral-separation reagent.

Phosflex T-BEP contributes to ore-slurry treatment where mechanical agitation and air entrainment generate excessive process foam.
Phosflex T-BEP promotes bubble collapse by entering susceptible foam films and reducing their mechanical stability.

Phosflex T-BEP enables mineral processors to adjust antifoaming performance through controlled addition at selected process locations.
Phosflex T-BEP requires site-specific testing because ore composition, water chemistry, frother type, solids concentration, and temperature influence performance.

Phosflex T-BEP serves as a softener and plasticizer in chlorinated-rubber formulations.
Phosflex T-BEP improves flexibility and processability while helping reduce brittleness in rigid or highly chlorinated polymer structures.

Phosflex T-BEP supports chlorinated-rubber coatings, adhesives, and specialty compounds requiring low-temperature flexibility.
Phosflex T-BEP contributes to easier application and reduced cracking when Phosflex T-BEP is incorporated at a compatible concentration.

Phosflex T-BEP functions as an efficient plasticizer in nitrile-rubber formulations.
Phosflex T-BEP reduces restrictive intermolecular forces and allows nitrile-rubber chains to move more freely during deformation.

Phosflex T-BEP provides excellent low-temperature properties in compatible nitrile-rubber compounds.
Phosflex T-BEP helps elastomeric articles retain softness and flexibility when reduced temperatures would otherwise increase stiffness.

Phosflex T-BEP contributes to seals and gaskets requiring flexibility, resilience, and controlled compression behavior.
Phosflex T-BEP supports sealing compounds used in industrial assemblies where low-temperature deformation and recovery are important.

Phosflex T-BEP supports hose formulations based on compatible nitrile-rubber or chlorinated-rubber systems.
Phosflex T-BEP helps flexible hoses withstand bending and movement without excessive hardening at reduced temperatures.

Phosflex T-BEP facilitates the manufacture of flexible shoe soles and related molded-rubber articles.
Phosflex T-BEP contributes softness, resilience, and flexibility while helping the rubber compound retain practical processing characteristics.

Phosflex T-BEP supports rubber compounds requiring low compression set and good recovery after deformation.
Phosflex T-BEP enables elastomer formulators to balance softness with dimensional recovery after prolonged mechanical compression.

Phosflex T-BEP contributes phosphorus to compatible rubber and polymer formulations requiring reduced flammability.
Phosflex T-BEP can support lower flammability while simultaneously providing plasticization, resilience, and low-temperature flexibility.

Phosflex T-BEP functions as a viscosity modifier in selected plastisol and polymer-dispersion formulations.
Phosflex T-BEP reduces processing viscosity and supports uniform spreading, coating, dipping, or casting when compatibility has been established.

Phosflex T-BEP assists the incorporation of compatible resins, fillers, pigments, and stabilizers into liquid polymer compounds.
Phosflex T-BEP improves wetting and flow when sufficient mechanical mixing distributes Phosflex T-BEP throughout the formulation.

Phosflex T-BEP serves as a plasticizer for compatible polymer dispersions and coating binders.
Phosflex T-BEP increases film flexibility and can improve coalescence when the polymer chemistry and application conditions are suitable.

Phosflex T-BEP supports waterborne resin systems requiring an oil-compatible plasticizer with limited water solubility.
Phosflex T-BEP partitions mainly into the polymer-rich phase after Phosflex T-BEP is emulsified or dispersed within the formulation.

Phosflex T-BEP contributes to industrial lacquers and coatings requiring a low-viscosity phosphate ester.
Phosflex T-BEP supports leveling, flexibility, resin compatibility, and controlled application behavior in suitably formulated coating systems.

Phosflex T-BEP functions as a specialty solvent for selected resins, oils, plasticizers, and organic formulation ingredients.
Phosflex T-BEP provides low volatility during ordinary processing and allows extended interaction with compatible resin components.

Phosflex T-BEP supports coating formulations requiring both plasticizing and surface-flow performance.
Phosflex T-BEP allows formulators to reduce the number of separate additives when Phosflex T-BEP provides several useful functions in one system.

Phosflex T-BEP contributes to adhesive formulations based on compatible chlorinated, nitrile, acrylic, and specialty resin systems.
Phosflex T-BEP improves flexibility and wetting while helping the adhesive layer resist brittle behavior after drying.

Phosflex T-BEP supports sealants and flexible coating compounds requiring persistent plasticization.
Phosflex T-BEP must be evaluated for migration, extraction resistance, adhesion, curing compatibility, and long-term mechanical performance.

Phosflex T-BEP functions as a pigment-wetting and flow-supporting auxiliary in selected ink and coating concentrates.
Phosflex T-BEP helps liquid vehicles penetrate pigment agglomerates when Phosflex T-BEP is combined with suitable dispersants and milling energy.

Phosflex T-BEP contributes to specialty printing and coating systems requiring slow evaporation and controlled open time.
Phosflex T-BEP helps the applied liquid remain mobile long enough to form a smoother and more uniform film.

Phosflex T-BEP supports synthetic-rubber and plastic formulations requiring a halogen-free phosphorus-containing additive.
Phosflex T-BEP can improve flexibility while contributing to lower flammability under formulation-specific testing conditions.

Phosflex T-BEP enables formulators to blend a phosphate plasticizer with conventional non-flame-retarding plasticizers.
Phosflex T-BEP allows plasticizing efficiency, low-temperature behavior, cost, migration resistance, and flame performance to be balanced.

Phosflex T-BEP serves as a formulation auxiliary in specialty industrial fluids requiring solvency and low viscosity.
Phosflex T-BEP can modify fluidity and additive compatibility when Phosflex T-BEP remains stable under the intended chemical and temperature conditions.

Phosflex T-BEP supports laboratory development of phosphate-ester plasticizer systems for rubbers, polymers, coatings, and waxes.
Phosflex T-BEP allows researchers to evaluate relationships among additive loading, flexibility, hardness, flow, migration, and flame response.

Phosflex T-BEP contributes to quality-control formulations used to compare alternative plasticizers, softeners, or leveling agents.
Phosflex T-BEP provides measurable effects on viscosity, low-temperature flexibility, surface appearance, and polymer mechanical behavior.

Phosflex T-BEP enables industrial manufacturers to formulate systems requiring plasticization, leveling, antifoaming performance, and phosphorus content.
Phosflex T-BEP performance should be confirmed through compatibility, aging, extraction, flammability, and processing trials.

Phosflex T-BEP is officially promoted for waxes, floor polishes, paper coatings, ore beneficiation, chlorinated rubber, and nitrile rubber.
Phosflex T-BEP is also recommended for seals, gaskets, hoses, shoe soles, and similar flexible-rubber applications.

DESCRIPTION

Phosflex T-BEP is a commercial grade based on Tris(2-butoxyethyl) Phosphate.
Phosflex T-BEP belongs to the class of non-halogenated trialkyl phosphate esters used as industrial plasticizers and formulation auxiliaries.

Phosflex T-BEP has the molecular formula C₁₈H₃₉O₇P and a molecular weight of approximately 398.47 g/mol.
Phosflex T-BEP is identified by CAS Number 78-51-3 and EC Number 201-122-9.

Phosflex T-BEP contains one phosphoryl group bonded through oxygen atoms to three 2-butoxyethyl chains.
Phosflex T-BEP combines a polar phosphate center with flexible ether-containing aliphatic groups.

Phosflex T-BEP is commonly manufactured through controlled esterification involving 2-butoxyethanol and a suitable phosphorus-containing reagent.
Phosflex T-BEP production requires reaction control, removal of acidic by-products, purification, and adjustment to commercial specifications.

Phosflex T-BEP normally appears as a clear, colorless to pale-yellow liquid.
Phosflex T-BEP may exhibit a mild characteristic odor depending on purity, processing history, and storage conditions.

Phosflex T-BEP has a commercial specific gravity of approximately 1.02.
Phosflex T-BEP contains approximately 7.8% phosphorus.

Phosflex T-BEP has a very low commercial viscosity of approximately 12 mPa·s at 25°C.
Phosflex T-BEP therefore flows, pumps, meters, and blends more easily than many higher-viscosity polymer plasticizers.

Phosflex T-BEP is only slightly soluble in water and shows substantially greater affinity for many organic and polymer-rich phases.
Phosflex T-BEP remains mainly associated with compatible waxes, rubbers, resins, oils, and coating binders.

Phosflex T-BEP remains liquid at very low temperatures because Tris(2-butoxyethyl) Phosphate has an extremely low freezing or melting point.
Phosflex T-BEP consequently offers useful handling and plasticizing performance in formulations intended for reduced-temperature service.

Phosflex T-BEP provides plasticization by increasing free volume and reducing restrictive interactions between neighboring polymer chains.
Phosflex T-BEP allows compatible polymer segments to move more freely and produces lower hardness with improved flexibility.

Phosflex T-BEP improves leveling by lowering formulation viscosity and supporting redistribution of a freshly applied liquid film.
Phosflex T-BEP helps surface irregularities diminish before a coating, polish, wax, or resin system becomes immobile.

Phosflex T-BEP controls foam by entering susceptible foam films and promoting drainage or rupture.
Phosflex T-BEP antifoaming performance depends on dispersibility, surface activity, process shear, temperature, and surrounding liquid chemistry.

Phosflex T-BEP contributes to reduced flammability through the phosphorus content of the molecular structure.
Phosflex T-BEP flame-performance benefits depend on polymer type, additive concentration, specimen thickness, ignition source, and test method.

Phosflex T-BEP provides excellent low-temperature plasticizing efficiency in compatible nitrile-rubber systems.
Phosflex T-BEP also supports good resilience and low compression set in properly optimized elastomer formulations.

Phosflex T-BEP displays low volatility under ordinary ambient handling conditions.
Phosflex T-BEP can nevertheless generate vapor, mist, or decomposition products during spraying, intensive heating, or thermal breakdown.

Phosflex T-BEP remains stable under recommended storage conditions when Phosflex T-BEP is protected from incompatible substances.
Phosflex T-BEP should remain separated from strong oxidizing agents, strong bases, excessive heat, and uncontrolled reactive chemicals.

Phosflex T-BEP can decompose during fire or severe overheating.
Phosflex T-BEP thermal decomposition can generate carbon oxides, phosphorus oxides, smoke, and irritating vapors.

Phosflex T-BEP has greater affinity for organic phases than for water.
Phosflex T-BEP can therefore migrate, leach, or be extracted to different degrees depending on polymer structure and service conditions.

Phosflex T-BEP commercial performance depends on purity, acidity, moisture, color, viscosity, phosphorus content, and trace impurities.
Phosflex T-BEP acceptance limits should follow the current specification and the certificate of analysis supplied with each batch.

Phosflex T-BEP may contain small quantities of manufacturing-related impurities in the commercial grade.
Phosflex T-BEP should not automatically be treated as identical to analytical-grade Tris(2-butoxyethyl) Phosphate without specification review.

Phosflex T-BEP should be tested with every polymer, resin, wax, pigment, surfactant, and stabilizer combination before commercial use.
Phosflex T-BEP compatibility can be influenced by additive concentration, curing chemistry, temperature, water content, and processing sequence.

Phosflex T-BEP migration and extraction resistance depend on the surrounding polymer network and complete formulation.
Phosflex T-BEP should be evaluated through heat aging, low-temperature testing, immersion, volatility, compression-set, and flammability studies.

Phosflex T-BEP shows thermal weight loss of approximately 2% at 170°C, 5% at 200°C, and 10% at 225°C in the current data.
Phosflex T-BEP processing temperature and residence time should therefore be controlled according to the thermal demands of the intended formulation.

Phosflex T-BEP retains quality most effectively in tightly closed containers protected from excessive heat and contamination.
Phosflex T-BEP should be handled according to the current regional Safety Data Sheet and site-specific occupational controls.

PROPERTIES

Product Name: Phosflex T-BEP

Trade Name: PHOSFLEX® T-BEP

Chemical Name: Tris(2-butoxyethyl) Phosphate

IUPAC Name: Tris(2-butoxyethyl) Phosphate

CAS Name: Ethanol, 2-Butoxy-, Phosphate (3:1)

Chemical Family: Trialkyl Phosphate Esters

Substance Type: Non-Halogenated Organophosphate Ester

Primary Functions: Leveling Agent, Plasticizer, Softener, Antifoaming Agent, and Phosphorus-Containing Additive

CAS Number: 78-51-3

EC Number: 201-122-9

PubChem CID: 6540

UNII: RYA6940G86

DSSTox Substance ID: DTXSID5021758

ChEBI ID: CHEBI:35038

Molecular Formula: C₁₈H₃₉O₇P

Structural Formula: [CH₃(CH₂)₃OCH₂CH₂O]₃P=O

Molecular Weight: 398.47 g/mol

Exact Mass: Approximately 398.2437 Da

InChIKey: WTLBZVNBAKMVDP-UHFFFAOYSA-N

SMILES: CCCCOCCOP(=O)(OCCOCCCC)OCCOCCCC

Phosphorus Content: Approximately 7.8%

Physical State: Liquid

Appearance: Clear, Colorless to Pale-Yellow Liquid

Odor: Mild Characteristic Odor

Specific Gravity: Approximately 1.02

Viscosity: Approximately 12 mPa·s at 25°C

Melting or Freezing Point: Below Approximately −70°C

Boiling Behavior: High-Boiling Liquid; Exact Value Depends on Pressure and Test Method

Closed-Cup Flash Point: Approximately 159°C in commonly reported substance data

Water Solubility: Slightly Soluble

Organic-Phase Compatibility: High in Many Compatible Resins, Rubbers, Waxes, and Oils

Ionic Character: Nonionic

Halogen Content: Halogen-Free

Volatility: Low under Normal Ambient Conditions

Plasticizing Efficiency: Excellent in Compatible Low-Temperature Rubber Systems

Leveling Performance: Excellent in Compatible Coating, Wax, and Floor-Finish Systems

Low-Temperature Properties: Excellent in Compatible Rubber Formulations

Resilience: Supports Good Resilience in Properly Formulated Elastomers

Compression-Set Performance: Supports Low Compression Set in Suitable Rubber Compounds

Foam Control: Effective Antifoaming Performance in Ore-Beneficiation Applications

Recommended Rubber Applications: Chlorinated Rubber and Nitrile Rubber

Recommended Molded Applications: Seals, Gaskets, Hoses, Shoe Soles, and Similar Articles

Recommended Coating Applications: Floor Polishes, Waxes, and Paper Coatings

TGA Weight Loss: Approximately 2% at 170°C

TGA Weight Loss: Approximately 5% at 200°C

TGA Weight Loss: Approximately 10% at 225°C

Chemical Stability: Stable under Recommended Storage Conditions

Combustibility: Combustible Organic Liquid

Hazardous Decomposition Products: Carbon Oxides and Phosphorus Oxides

Incompatible Materials: Strong Oxidizing Agents and Strong Bases

Conditions to Avoid: Excessive Heating and Uncontrolled Contact with Incompatible Materials

Storage Conditions: Tightly Closed, Cool, Dry, and Well Ventilated

Shelf Life: Refer to the Current Specification and Certificate of Analysis

FIRST AID

Inhalation: Move the person exposed to Phosflex T-BEP vapor, mist, aerosol, or thermal decomposition fumes into fresh air.
Obtain medical attention if Phosflex T-BEP exposure causes persistent coughing, respiratory discomfort, dizziness, or breathing difficulty.

Skin Contact: Remove clothing contaminated with Phosflex T-BEP and wash the affected skin thoroughly with soap and water.
Obtain medical advice if Phosflex T-BEP exposure causes persistent redness, discomfort, dryness, or irritation.

Eye Contact: Rinse eyes exposed to Phosflex T-BEP immediately with clean running water for at least 15 minutes.
Remove contact lenses when easy to do and obtain medical attention if Phosflex T-BEP causes continuing redness, pain, or visual disturbance.

Ingestion: Rinse the mouth thoroughly after accidental ingestion of Phosflex T-BEP and do not induce vomiting unless instructed by medical personnel.
Contact a physician or poison information center after significant Phosflex T-BEP ingestion or whenever symptoms develop.

Note to Physicians: Treat Phosflex T-BEP exposure symptomatically and provide supportive care.
Consult the current regional Safety Data Sheet because Phosflex T-BEP classifications and medical recommendations may vary by jurisdiction and document revision.

HANDLING AND STORAGE

Handling: Handle Phosflex T-BEP according to good industrial hygiene and chemical-processing practices.
Avoid breathing Phosflex T-BEP vapor or aerosol and prevent unnecessary Phosflex T-BEP contact with the eyes, skin, and clothing.

Ventilation: Provide effective general ventilation wherever Phosflex T-BEP is transferred, mixed, heated, sprayed, or sampled.
Use local exhaust ventilation and suitable respiratory protection when Phosflex T-BEP mist or vapor cannot be adequately controlled.

Storage: Store Phosflex T-BEP in tightly closed original or supplier-approved containers.
Keep Phosflex T-BEP in a cool, dry, and well-ventilated area away from excessive heat, strong oxidizing agents, strong bases, and contamination.

Spill and Leak Procedures: Contain released Phosflex T-BEP with sand, earth, or another suitable inert absorbent.
Prevent Phosflex T-BEP from entering drains, soil, or surface water and transfer recovered Phosflex T-BEP into labeled waste containers.

Handling Precautions: Wear suitable protective gloves, safety glasses, and protective work clothing while handling concentrated Phosflex T-BEP.
Clean spilled Phosflex T-BEP promptly because Phosflex T-BEP may create a slippery surface and review the current Safety Data Sheet before commercial use.