PHOSFLEX 176C

Phosflex 176C is a phosphate ester plasticizer and specialty solvent commonly identified as tris(2-butoxyethyl) phosphate, and Phosflex 176C is valued for plasticizing efficiency, flame-retardant contribution, low volatility, solvency, and compatibility with many resin and polymer systems.
Phosflex 176C is also known as TBEP or Tributoxyethyl Phosphate, and public chemical references list Phosflex 176C among trade names for tris(2-butoxyethyl) phosphate with CAS Number 78-51-3.
Phosflex 176C is typically supplied as a clear to pale yellow liquid, and Phosflex 176C performance depends on purity, acidity, water content, phosphorus content, viscosity, volatility, resin compatibility, plasticizer loading, and processing temperature.

CAS Number: 78-51-3
EC Number: 201-122-9
Molecular Formula: C18H39O7P
Molecular Weight: 398.47 g/mol

Synonyms: Phosflex 176C, PHOSFLEX 176C, Phosflex TBEP, TBEP, Tributoxyethyl Phosphate, Tris(2-Butoxyethyl) Phosphate, Tri(2-Butoxyethyl) Phosphate, Phosphoric Acid Tris(2-Butoxyethyl) Ester, Phosphoric Acid Tri-2-Butoxyethyl Ester, 2-Butoxyethanol Phosphate, Amgard TBEP, Kronitex KP-140, Phosflex 176C, PHOSFLEX 176C, Phosflex 176 C, PHOSFLEX 176 C, Phosflex-176C, PHOSFLEX-176C, Phosflex 176C Plasticizer, PHOSFLEX 176C Plasticizer, Phosflex 176C Flame Retardant, PHOSFLEX 176C Flame Retardant, Phosflex 176C Phosphate Ester, PHOSFLEX 176C Phosphate Ester, Phosflex 176C Flame Retardant Plasticizer, PHOSFLEX 176C Flame Retardant Plasticizer, Isopropylated Triaryl Phosphate, Triaryl Phosphate Ester, Aryl Phosphate Ester, Isopropylated Triphenyl Phosphate, Isopropylphenyl Diphenyl Phosphate, Phenyl Isopropylphenyl Phosphate, Alkylated Triaryl Phosphate, Phosphate Ester Plasticizer, Aryl Phosphate Plasticizer, Flame Retardant Phosphate Plasticizer, Low Volatility Phosphate Ester, Phosflex 176C Resin Additive, Phosflex 176C Polymer Additive, Phosflex 176C PVC Additive, Phosflex 176C Rubber Additive, Phosflex 176C Coating Additive, Phosflex 176C Paint Additive, Phosflex 176C Adhesive Additive, Phosflex 176C Sealant Additive, Phosflex 176C Elastomer Additive, Phosflex 176C Flexible Polymer Additive, Phosflex 176C Industrial Grade, PHOSFLEX 176C Industrial Grade, Phosflex 176C Technical Grade, PHOSFLEX 176C Technical Grade, Phosflex 176C Chemical Grade

APPLICATIONS

Phosflex 176C is used as a plasticizer in PVC and vinyl resin systems to improve flexibility, processability, and softness.
Phosflex 176C is incorporated into flexible vinyl formulations where phosphate ester chemistry provides both plasticizing behavior and flame-retardant contribution.
Phosflex 176C is used in polymer compounds where low volatility and resin compatibility support durable flexible performance.

Phosflex 176C is used in coatings, lacquers, and resin systems as a solvent and plasticizing aid.
Phosflex 176C is incorporated into cellulose ester lacquers, acrylic systems, vinyl coatings, and specialty resin blends where solvency and flexibility are required.
Phosflex 176C is used in coatings where improved film formation, reduced brittleness, and controlled evaporation behavior are useful.

Phosflex 176C is used in adhesives and sealants to improve flexibility, flow, and compatibility with selected polymer binders.
Phosflex 176C is incorporated into pressure-sensitive adhesives, construction sealants, and specialty bonding systems where plasticizer permanence is important.
Phosflex 176C is used in elastomeric systems where phosphate ester plasticization supports lower hardness and improved deformation behavior.

Phosflex 176C is used in floor polishes, waxes, and specialty surface-care formulations as a coalescent, plasticizer, and leveling aid.
Phosflex 176C is incorporated into waterborne and solventborne surface coatings where improved film toughness and gloss development are required.
Phosflex 176C is used in maintenance products where compatibility with polymer emulsions and resin systems must be verified.

Phosflex 176C is used as a specialty solvent and processing aid in inks, pigment dispersions, and industrial chemical formulations.
Phosflex 176C is incorporated into pigment grinding and dispersion systems where phosphate ester solvency can support wetting and flow.
Phosflex 176C is valued because Phosflex 176C provides plasticization, solvency, low volatility, flame-retardant contribution, and resin compatibility across PVC, coatings, adhesives, inks, polishes, and specialty industrial applications.

Phosflex 176C is used as a flame-retardant plasticizer in polymer formulations.
Phosflex 176C helps improve flexibility while contributing phosphorus-based flame-retardant performance.
Phosflex 176C is used in PVC compounds.
Phosflex 176C supports softness, processability, and functional additive performance in flexible vinyl systems.

Phosflex 176C is used in polyurethane formulations.
Phosflex 176C can improve flexibility and fire-resistance performance in compatible polyurethane systems.
Phosflex 176C is used in synthetic rubber formulations.
Phosflex 176C supports plasticization and flame-retardant behavior in selected elastomer compounds.

Phosflex 176C is used in coating formulations.
Phosflex 176C helps improve film flexibility and flame-retardant properties.
Phosflex 176C is used in industrial paint systems.
Phosflex 176C supports durable coating performance where phosphate ester functionality is required.

Phosflex 176C is used in adhesive formulations.
Phosflex 176C improves flexibility and compatibility in selected adhesive systems.
Phosflex 176C is used in sealant formulations.
Phosflex 176C supports elastic performance and plasticization in compatible sealants.

Phosflex 176C is used in plastisol formulations.
Phosflex 176C helps adjust viscosity, fusion behavior, and final flexibility.
Phosflex 176C is used in vinyl foam formulations.
Phosflex 176C supports softness and functional flame-retardant additive performance.

Phosflex 176C is used in textile coating formulations.
Phosflex 176C helps improve flexibility and fire-resistance performance in coated fabrics.
Phosflex 176C is used in back-coating systems for textiles.
Phosflex 176C supports durable finishing where softness and flame-retardant behavior are needed.

Phosflex 176C is used in furniture and upholstery coating systems.
Phosflex 176C helps improve flame-retardant performance in compatible coated textile materials.
Phosflex 176C is used in automotive interior materials.
Phosflex 176C supports flexible polymer systems requiring reduced flammability and processing stability.

Phosflex 176C is used in construction material formulations.
Phosflex 176C helps improve fire-resistance performance in selected polymeric building products.
Phosflex 176C is used in wire and cable compounds.
Phosflex 176C supports flexible insulation and jacketing systems requiring flame-retardant properties.

Phosflex 176C is used in floor covering formulations.
Phosflex 176C helps provide flexibility and functional fire-performance support in vinyl flooring systems.
Phosflex 176C is used in wall covering materials.
Phosflex 176C supports durable and flexible decorative vinyl layers.

Phosflex 176C is used in cellulose ester formulations.
Phosflex 176C can act as a plasticizer for compatible cellulose-based polymers.
Phosflex 176C is used in nitrocellulose lacquer systems.
Phosflex 176C helps improve flexibility and film performance in compatible lacquers.

Phosflex 176C is used in acrylic resin formulations.
Phosflex 176C supports plasticization and compatibility in selected acrylic systems.
Phosflex 176C is used in vinyl resin formulations.
Phosflex 176C helps improve flexible film formation and processing behavior.

Phosflex 176C is used in lubricant additive development.
Phosflex 176C contributes phosphate ester functionality to specialty fluid systems.
Phosflex 176C is used in hydraulic fluid formulations.
Phosflex 176C supports fire-resistant functional fluid design.

Phosflex 176C is used in metalworking fluid formulations.
Phosflex 176C can improve lubricity and additive compatibility in selected systems.
Phosflex 176C is used in pigment dispersion systems.
Phosflex 176C helps wet and disperse pigments in compatible resin-based formulations.

Phosflex 176C is used in printing ink formulations.
Phosflex 176C supports flow, flexibility, and film performance in suitable ink vehicles.
Phosflex 176C is used in specialty chemical manufacturing.
Phosflex 176C serves as a functional phosphate ester additive for industrial formulation systems.

Phosflex 176C is used in research and development of flame-retardant plasticizer systems.
Phosflex 176C supports studies requiring a liquid organophosphate additive with plasticizing performance.
Phosflex 176C is used in applications requiring flexibility, compatibility, and phosphorus-based functionality.
Phosflex 176C supports polymer, coating, adhesive, sealant, textile, and specialty fluid formulations.

DESCRIPTION

Phosflex 176C is a trialkyl phosphate ester based on tris(2-butoxyethyl) phosphate chemistry, and Phosflex 176C belongs to the organophosphate ester family of plasticizers and functional solvents.
Phosflex 176C contains a phosphorus-oxygen ester core with three butoxyethyl groups, giving Phosflex 176C both polar phosphate functionality and organic solvent compatibility.
Phosflex 176C is identified in chemical listings as tris(2-butoxyethyl) phosphate with molecular formula C18H39O7P and molecular weight about 398.47 g/mol.

Phosflex 176C functions as a plasticizer by increasing polymer chain mobility, lowering stiffness, and improving flexibility in compatible resin systems.
Phosflex 176C can contribute to flame retardancy because phosphate esters introduce phosphorus into the formulation, although final flame performance depends on polymer type, loading level, and complete formulation design.
Phosflex 176C also acts as a solvent or co-solvent for selected resins, helping processing, film formation, and pigment dispersion in coatings and industrial formulations.

Phosflex 176C should be evaluated in the complete formulation because compatibility, migration, volatility, extraction resistance, odor, and low-temperature flexibility depend on the polymer matrix and additive package.
Phosflex 176C should be protected from strong oxidizers, strong acids, strong bases, excessive heat, and moisture contamination during storage.
Phosflex 176C should be used according to supplier recommendations, workplace safety standards, chemical inventory requirements, and the regulatory status of the target application.

PROPERTIES

CAS Number: 78-51-3
EC Number: 201-122-9
Chemical Formula: C18H39O7P
Molecular Weight: 398.47 g/mol
Common Name: Phosflex 176C
Chemical Type: Trialkyl phosphate ester; organophosphate plasticizer; specialty solvent; flame-retardant plasticizer
Appearance: Clear colorless to pale yellow liquid
Odor: Mild characteristic odor
Solubility: Low solubility in water; soluble or miscible with many organic solvents and compatible resin systems
Function: Plasticizer, solvent, coalescent, flame-retardant contributor, pigment grinding aid, processing aid
Phosphorus Content: Grade dependent
Viscosity: Low to moderate liquid viscosity, grade dependent
Volatility: Low volatility compared with many conventional solvents
Compatibility: PVC, vinyl resins, cellulose esters, acrylics, coatings, inks, adhesives, and selected elastomers, formulation dependent
Stability: Stable under recommended storage; protect from heat, moisture, and incompatible chemicals
Storage Temperature: 15–30°C, tightly closed, dry, well-ventilated
Shelf Life: Typically 12–36 months in original sealed packaging, supplier dependent

FIRST AID

Inhalation:
Move to fresh air if vapors, mist, or aerosols are inhaled.
Seek medical attention if coughing, headache, dizziness, respiratory irritation, or breathing discomfort occurs.
Avoid further exposure until ventilation and vapor or mist controls are confirmed.

Skin Contact:
Remove contaminated clothing and wash skin thoroughly with soap and water.
Seek medical advice if irritation, redness, dryness, or prolonged discomfort develops.
Wash contaminated clothing before reuse.

Eye Contact:
Rinse cautiously with water for at least 15 minutes.
Remove contact lenses if present and easy to do, then continue rinsing.
Seek medical attention if irritation, pain, or blurred vision persists.

Ingestion:
Rinse mouth with water and do not induce vomiting.
Seek medical attention or contact a poison center if discomfort occurs or if a significant amount is swallowed.
Never give anything by mouth to an unconscious person.

Note to Physicians:
Treat symptomatically.
Monitor for irritation, gastrointestinal discomfort, and possible systemic effects after significant phosphate ester exposure.
Provide supportive care as needed.

HANDLING AND STORAGE

Handling:
Use appropriate PPE including chemical-resistant gloves, safety glasses, and protective clothing for bulk handling.
Avoid breathing vapors, mist, or aerosols and avoid prolonged skin or eye contact.
Use clean, dry equipment to prevent contamination and maintain consistent plasticizer quality.

Ventilation:
Use general ventilation for normal handling.
Use local exhaust ventilation where mist, aerosol, heated vapor, or spray exposure may be generated.
Provide adequate ventilation during heating, blending, filling, and large-scale transfer operations.

Storage:
Store in tightly closed containers in a cool, dry, well-ventilated area.
Protect from excessive heat, direct sunlight, moisture contamination, and incompatible chemicals.
Keep away from strong oxidizers, strong acids, strong bases, and reactive materials.

Spill and Leak Procedures:
Eliminate unnecessary ignition sources and ventilate the area.
Contain spill with inert absorbent and collect into suitable chemical waste containers.
Prevent entry into drains, soil, and waterways and dispose of waste according to local regulations.

Handling Precautions:
Confirm compatibility because Phosflex 176C plasticizer performance depends on resin type, additive package, loading level, and processing temperature.
Control migration and extraction resistance because phosphate ester plasticizers can behave differently in different polymer systems and end-use environments.
Rotate stock using FIFO practices to maintain consistent color, acidity, water content, odor profile, and plasticizing performance.