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Kronitex KP-140 is a liquid plasticizer and functional additive chemically based on Tris(2-butoxyethyl) Phosphate, in the phosphate ester class. This compound, identified by CAS No 78-51-3, is also known by the abbreviation Kronitex KP-140 and can be used as a plasticizer, viscosity regulator, solvent or foam control auxiliary in resins, synthetic rubbers, plastics, lacquers, plastisols, floor polishes and different technical formulations.
In the molecule of Kronitex KP-140, the central phosphate group is surrounded by three 2-butoxyethyl ester chains. This structure brings together the polar character of the phosphate ester and the organic phase compatibility of the butoxy-ethyl segments in the same molecule.
Kronitex KP-140 is chemically different from conventional phthalate plasticizers. The molecule's phosphorus inclusion affects its flammability behavior and thermal properties, while the ether and alkyl segments can provide compatibility with various organic polymers and low-temperature flowability.
Kronitex KP-140 has historically been widely used, especially in floor polish and coating systems. Its low volatility and ability to remain in the film phase can help regulate the flexibility and application properties of the polymer film.
Kronitex KP-140 can be considered as a viscosity regulator in plastisol systems. Depending on the PVC, resin and other plasticizer systems used, it can contribute to adjusting the process viscosity and achieving more favorable flow behavior during application.
Kronitex KP-140 can act as a plasticizer in synthetic rubber and elastomer systems. By reducing secondary interactions between polymer chains, it can help increase chain mobility and achieve lower stiffness or better low-temperature flexibility.
Kronitex KP-140 is a high-boiling liquid with a low vapor pressure. At about 20 °C, its viscosity is 11–15 mPa·s, its density is about 1.02 g/mL, and its water solubility is about 1.1–1.3 g/L.
The commercial and historical identity of Kronitex KP-140 is directly related to Kronitex KP-140. NIST and international chemical safety sources cite the names Kronitex KP-140, KP-140, and Phosflex T-BEP among the trade names used for Tris(2-butoxyethyl) Phosphate.
The current commercial manufacturer or grade specification for Kronitex KP-140 should not be confused with the information seen in older commercial sources. Today, Kronitex KP-140 grades can be found from different manufacturers under the same CAS number, and parameters such as purity, color, acidity value or water content may vary.
When purchasing Kronitex KP-140, therefore, not only the old trade name, but also the Tris(2-butoxyethyl) Phosphate identity, CAS number, actual purity, physical properties and current COA values must be verified together.
WHAT IS KRONITEX KP-140?
Kronitex KP-140 is chemically a triester formed by phosphoric acid with three 2-butoxyethyl groups.
The IUPAC name is given as Tris(2-butoxyethyl) Phosphate.
NIST also defines the compound as Ethanol, 2-butoxy-, phosphate (3:1). Its molecular formula is C₁₈H₃₉O₇P. Its molecular weight is approximately 398.47 g/mol. CAS No is 78-51-3. EC/EINECS No is 201-122-9.
In the center of the molecule is the phosphate unit carrying the P=O group.
Each of the three ester arms attached to the phosphorus atom has the structure -O-CH₂-CH₂-O-C₄H₉. Therefore, the molecule carries both polar regions due to phosphate and ether oxygens and organic character due to butoxy chains. This dual structure promotes compatibility with different resins and elastomers.
Kronitex KP-140 is a light-colored or colorless, viscous liquid at room temperature. Thanks to its very low freezing point, it can remain liquid at low temperatures.
A melting or freezing point of about −70 °C has been reported in the literature. Low vapor pressure indicates a limited tendency to evaporate rapidly at normal ambient temperature.
This property is important for the plasticizer.
The rapid displacement of the plasticizer from the polymer film can lead to an increase in stiffness and brittleness over time.
Thanks to its low volatility, Kronitex KP-140 can stay in the polymer or coating system for a longer period of time.
However, the actual migration resistance does not depend solely on vapor pressure.
Chemical compatibility with the polymer, temperature, contact surface, and other additives also affect migration behavior.
Kronitex KP-140 can increase the mobility of polymer chains in synthetic rubbers and plastics. The plasticizer molecule enters between the polymer chains, reducing chain-chain interactions.
Thus, the glass transition temperature and hardness of the system can be reduced depending on the application. Elasticity and low-temperature flexibility can be improved.
And in plastisol formulations, Kronitex KP-140 can affect not only mechanical properties but also initial viscosity and gel behavior.
It can be used to control film flexibility, surface smoothness and application behavior in floor polishes.
Kronitex KP-140 may also exhibit solvent or co-solvent-like behavior in some resins.
International chemical safety sources state that the compound is also used as an antifoam.
Therefore, Kronitex KP-140 can not be considered as a single-function plasticizer, but as a multi-functional phosphate ester additive according to the application.
COMMON PRODUCT AND CHEMICAL NAMES
Kronitex KP-140
KP-140
Tris(2-butoxyethyl) Phosphate
Tributoxyethyl Phosphate
Kronitex KP-140
Phosflex T-BEP
CAS 78-51-3
EC 201-122-9
CAS NO, EC / EINECS NO AND CHEMICAL IDENTIFICATION
Product Name: Kronitex KP-140
Generic chemical name: Tris(2-butoxyethyl) Phosphate
Abbreviation: Kronitex KP-140
CAS name: Ethanol, 2-butoxy-, phosphate (3:1)
CAS No: 78-51-3
EC/EINECS No: 201-122-9
Molecular formula: C₁₈H₃₉O₇P
Molecular weight: Approximately 398.47 g/mol
Chemical class: Organophosphate ester
Functional groups: Phosphate triester and ether groups
Physical form: Colorless to light yellow viscous liquid
Melting point: About -70°C
Density: Approximately 1.00–1.02 g/mL
Viscosity: Approx. 11–15 mPa·s, 20 °C
Water solubility: Approx. 1.1–1.3 g/L, 20 °C
Refractive index: Approximately 1,437–1,439
Vapor pressure: Very low
Boiling behavior: Approx. 200–230 °C, under low pressure
Its main functions: Plasticizer, viscosity regulator, solvent, antifoam, and phosphorous flame retardant additive in some applications
CHEMICAL STRUCTURE AND MOLECULAR PROPERTIES OF KRONITEX KP-140
Kronitex KP-140 has a phosphorus atom at its center.
The phosphorus atom carries one pair bonded oxygen and three phosphate ester oxygen.
Each ester oxygen is attached to the 2-butoxyethyl group.
The general structure can be shown as follows:
[CH₃(CH₂)₃OCH₂CH₂O]₃P(O)
This structure results in a total of seven oxygen atoms in the molecule.
The phosphate part has a strong polar character.
Ether bonds also provide dipole-dipole interactions.
Butoxin chains show hydrocarbon characteristics.
Thus, Kronitex KP-140 is not only a nonpolar or only polar additive.
This non-amphiphilic yet polarity-balanced structure can enhance its compatibility in various resins.
In the polymer phase, Kronitex KP-140 can settle between chains.
Some of the polymer-polymer interactions are replaced by polymer-plasticizer interactions.
The free volume of chains may increase.
It may become easier for molecular segments to move.
This can reduce the glass transition temperature.
The material can become softer and more pliable.
The phosphate ester structure can form phosphorus-containing degradation products during combustion.
Therefore, Kronitex KP-140 can contribute to changing the flammability behavior in combination with plasticization in some systems.
However, flame retardant performance is strongly dependent on the type of polymer and the level of use.
Kronitex KP-140 should not be used assuming that it will provide the same performance as special reactive flame retardants with high phosphorus content.
The approximate theoretical phosphorus content is around 7.8%.
This value can be calculated from the ratio of phosphorus atoms in the total weight of the molecule.
Ether groups can support the interaction of the molecule with polar resins and plastisol systems.
Three butoxin chains prevent complete solubility in water.
For this reason, Kronitex KP-140 is only soluble in water in a limited amount.
It can show higher compatibility in organic solvents and many resin environments.
The main functions of Kronitex KP-140 at the molecular level are:
Settling between polymer chains
Increasing chain mobility
Helping to reduce the glass transition temperature
Reducing stiffness
Improving flexibility
Regulating low-temperature properties
Changing plastisol viscosity
Regulating the flow of the coating film
Demonstrate co-solvent behavior in resin systems
Changing flammability behavior with phosphorus content
Helping to reduce foam in some systems
PHYSICAL AND CHEMICAL PROPERTIES OF KRONITEX KP-140
Kronitex KP-140 is a light-colored viscous liquid with low volatility under normal conditions.
General technical specifications:
Physical appearance: Clear liquid between colorless and light yellow
Chemical name: Tris(2-butoxyethyl) Phosphate
Abbreviation: Kronitex KP-140
CAS No: 78-51-3
EC/EINECS No: 201-122-9
Molecular formula: C₁₈H₃₉O₇P
Molecular weight: Approximately 398.47 g/mol
Chemical class: Phosphate ester
Density: Approx. 1.02 g/mL, 20 °C
Density in laboratory grades: Approx. 1.00 g/mL, 20–25 °C
Viscosity: Approx. 11–15 mPa·s, 20 °C
Another source value for dynamic viscosity: Approx. 12.2 mPa·s, 20 °C
Melting/freezing point: Approx. -70°C
Refractive index: Approximately 1,434–1,439
Water solubility: Approx. 1.1–1.3 g/L, 20 °C
Vapor pressure: Approx. 2.8 × 10⁻⁷ hPa, 25 °C
Boiling zone at low pressure: Approx. 200–230 °C, 5.0–5.3 hPa
Boiling range in other laboratory source: 215–228 °C, 4 mmHg
Flash point: Different values are reported depending on the test method
Closed container literature value: >113 °C
Closed cup value in some databases: Approx. 222 °C
Flash point in laboratory product registration: Approx. 132 °C
Volatility at room temperature: Very low
Behavior in water: Limited soluble
Organic phase behavior: Compatible with various organic resins and solvents
The difference in flash point data depends on the test method used, product purity, and source data.
For this reason, the current SDS value should be used in the safety assessment of the exact Kronitex KP-140 or Kronitex KP-140 grade purchased.
The same approach applies to purity.
In old international sources, it was stated that the technical Kronitex KP-140 product may contain impurities such as tributyl phosphate, 2-butoxyethanol and phosphoric acid.
Today, the impurity profile of commercial high-purity grades can be different.
Historical impurity levels should therefore not be applied directly to the current product.
HOW DOES KRONITEX KP-140 WORK AT THE MOLECULAR LEVEL?
The plasticizing effect of Kronitex KP-140 is based on the fact that it weakens the molecular interactions between polymer chains.
In a polymer system without plasticizers, the chains can be packed close together.
Strong dipole or hydrogen bond-like interactions can be found between polar groups.
When Kronitex KP-140 molecules enter between polymer chains, some of these chain-chain interactions are reduced.
Free volume may increase.
Segmental mobility increases.
The material may become more flexible as a result of this.
At low temperature, brittleness can be reduced.
Film or elastomer hardness can be reduced.
In plastisol systems, the low-viscosity Kronitex KP-140 molecule alters the flow properties of the liquid phase between the resin particles.
Therefore, the application viscosity can be adjusted.
Higher interaction develops between the polymer and the plasticizer during heating.
The plastisol becomes a gel and then the fusion can be completed.
In floor polishes, Kronitex KP-140 can reduce the brittleness of the film-forming polymer phase.
It can also help surface spreading and film smoothness.
The phosphate ester structure can influence flame behavior by forming phosphorus-containing intermediates during combustion.
However, this effect varies depending on the resin used and the concentration of Kronitex KP-140.
The main functions of Kronitex KP-140 at the molecular and formulation level are:
Plasticizing
Enhancing polymer chain mobility
Reducing the glass transition temperature
Providing flexibility
Improving low-temperature behavior
Adjusting plastisol viscosity
Supporting film formation
Changing resin solubility or swelling
Helping to reduce foam
Changing combustion behavior with phosphate structure
IN WHICH SECTORS IS KRONITEX KP-140 USED?
Kronitex KP-140 has been evaluated as a technical additive especially in plastic, rubber, coating and surface treatment systems.
Main areas of use:
Floor polishes
Floor care products
Polymeric floor finishing systems
Plasticized resins
Synthetic rubbers
Plastics
Lacquers
Technical coatings such as varnish
PVC plastisols
Plastisol coatings
Resin systems
Technical elastomers
Rubber seals
Technical rubber products
Coating aids
Film-forming systems
Applications of viscosity modifiers
Antifoam applications
Phosphate ester plasticizer systems
Applications of flame retardant plasticizers
International chemical safety sources define the main areas of use of Kronitex KP-140 as floor polish, solvent in some resins, viscosity modifier in plastisols, antifoam and plasticizer in synthetic rubber/plastic/lacquer systems.
Some of these usage areas are historical applications.
In developing an up-to-date industrial product, the legislation and modern alternatives in the target market should be evaluated separately.
FLOOR POLISH, COATING AND RESIN APPLICATIONS OF KRONITEX KP-140
Floor polishes are one of the best documented uses of Kronitex KP-140.
After applying the floor polish film, it loses water or solvent and forms a continuous polymer layer.
When the film is too hard, it can become brittle at low temperature or mechanical impact.
Kronitex KP-140 can regulate flexibility by increasing polymer chain mobility within the film.
Possible functions of Kronitex KP-140 in flooring and coating systems include:
Improving film flexibility
Reducing fragility
Supporting film formation
Regulating surface spread
Plasticizing the polymer phase
Adjusting the mechanical behavior of the coating
Supporting low temperature performance
Changing the application viscosity
Improving resin compatibility
Supporting surface smoothness
Film flexibility can increase as the amount of plasticizer increases in floor polishes.
However, too high a level of plasticizer can cause the film to become too soft.
Scratching and dirt retention may increase.
Gloss strength may vary.
For this reason, the level of Kronitex KP-140 must be optimized not only on flexibility but also on the overall surface performance.
In resin systems, Kronitex KP-140 can swell some polymers or exert a solvent-like effect.
This behavior depends on the polarity and molecular weight of the resin.
During the selection of plasticizers, the risk of migration from the film and exudation to the surface should also be evaluated.
USE OF KRONITEX KP-140 IN PVC, PLASTIC, RUBBER AND ELASTOMER APPLICATIONS
Kronitex KP-140 can be used as a viscosity regulator in plastisol systems.
Plastisol is usually the system in which PVC resin particles are dispersed in the liquid plasticizer phase.
The initial viscosity determines the applicability of the coating, dipping, spreading or molding process.
Kronitex KP-140 can modify total plastisol rheology as a low viscosity phosphate ester.
Its interaction with PVC can develop during heating, affecting gel and fusion behavior.
As the plasticizer ratio increases, the final PVC generally becomes softer.
In return, the mechanical modulus and surface hardness may decrease.
Kronitex KP-140 can also be used as a softener/plasticizer in synthetic rubbers.
Lowering the viscosity of the rubber compound can reduce the mixing and forming energy.
Filler dispersion can be made easy.
Extrusion or molding behavior can vary.
The final elastomer hardness can be reduced.
Low-temperature flexibility can be improved.
However, the compatibility of the plasticizer with the elastomer is the critical parameter.
The incompatible admixture can migrate to the surface over time.
Contact with oil, water, solvent or other media may also affect extraction behavior.
For this reason, not only process viscosity but also long-term migration and extraction tests should be performed in the rubber system to be used with Kronitex KP-140.
IS KRONITEX KP-140 USED IN FOOD, COSMETICS AND PHARMACEUTICAL APPLICATIONS?
Kronitex KP-140 is mainly technical plasticizer and phosphate ester additive.
It is not a direct food additive.
It should not be added as an ingredient in food formulation.
Historical sources contain information about the use of Kronitex KP-140 as a plasticizer in some food contact plastics.
This does not mean that Kronitex KP-140 is a food additive.
In modern food contact applications, the compliance of the exact product with the legislation of the target country should also be verified.
In cosmetic formulations, Kronitex KP-140 is not positioned as a general-purpose cosmetic raw material.
It should not be used without documenting suitability for cosmetic use.
The same is true in pharmaceutical applications.
Kronitex KP-140 has been reported to be used in the past as a plasticizer in certain rubber stoppers or technical medical parts.
However, for pharmaceutical packaging, medical elastomers or products that come into contact with blood, current extractables/leachables, biocompatibility and regulatory requirements are much stricter.
Therefore, Kronitex KP-140 should not be assumed to be of pharmaceutical or medical grade.
INDUSTRIAL APPLICATIONS OF KRONITEX KP-140
The industrial function of Kronitex KP-140 is mainly plasticization and adjustment of liquid phase properties.
The following functions may come to the fore in industrial Kronitex KP-140 applications:
Polymer plasticization
Rubber plasticizing
Regulating PVC plastisol viscosity
Floor polish formulation
Coating film flexibility enhancement
Solvent/co-solvent function in resin systems
Foam control
Providing low-temperature flexibility
Reducing process viscosity
Reducing film brittleness
Enhancing polymer chain mobility
Phosphate ester doping
Helping to change flammability behaviour
Technical plasticizing of lacquers and coatings
Kronitex KP-140 usage amount cannot be given as a single percentage for all systems.
The required amounts are different in floor polish, plastisol, rubber and resin applications.
The formulator should determine the level of utilization based on target Shore hardness, Tg, film flexibility, viscosity or flame performance.
The same level of Kronitex KP-140 does not provide the same effect on different polymers.
The difference in solubility parameter between polymer and plasticizer is significant.
With high compatibility, the plasticizer can remain more homogeneous within the polymer matrix.
With low compatibility, transpiration or migration to the surface may occur.
The following issues should be evaluated when using Kronitex KP-140 in industrial systems:
Product purity
Color
Density
Viscosity
Amount of water
Acid value
Phosphorus content
Volatility
Polymer compatibility
Plasticizing efficiency
Tg effect
Shore hardness
Tensile strength
Elongation
Migration
Extraction strength
Plastisol viscosity
Gel behavior
Film hardness
Film flexibility
Surface adhesion
Flame behavior
TDS
SDS
COA
WHAT PROBLEMS CAN KRONITEX KP-140 SOLVE?
Kronitex KP-140 can help solve technical problems such as excessive hardness, high process viscosity or insufficient low temperature flexibility in plastic, rubber and coating systems.
Polymer film is too brittle
Kronitex KP-140 can help improve film flexibility by increasing polymer chain mobility.
Low-temperature cracking
The plasticizing effect can contribute to lowering Tg, reducing low-temperature brittleness.
Plastisol viscosity is too high
Kronitex KP-140 can help lower the application viscosity by changing the rheology of the liquid phase.
Rubber compound is difficult to process
At the appropriate level, the plasticizer can reduce the mixer torque and process viscosity.
Floor polish film is too hard
Kronitex KP-140 can adjust film flexibility and provide more stable behavior against mechanical deformations.
Insufficient flow of resin
Its solvent/plasticizer character can change the flow and film formation behavior.
Excessive foam formation in the formulation
International sources state that Kronitex KP-140 can also be used as antifoam in some applications.
The need to improve flammability behavior
The phosphorus-containing ester structure may contribute to the improvement of flame behavior in some polymer systems.
However, the specific flame class cannot be guaranteed solely by looking at the use of Kronitex KP-140.
Migration of plasticizer to the surface
Kronitex KP-140 may not always be the solution to this problem.
Compatibility with the polymer, usage rate and ambient conditions should be re-evaluated.
Very soft final product
In this case, it may be necessary to reduce the level of Kronitex KP-140 or use an alternative with lower plasticizer efficacy.
THINGS TO CONSIDER WHEN USING KRONITEX KP-140
Polymer compatibility, plasticizer amount, migration and current legislation are the main technical issues in the use of Kronitex KP-140.
The following issues should be considered when using Kronitex KP-140:
The CAS number must be verified.
The Kronitex KP-140 ID should be checked.
Exact commercial grade must be verified.
Purity must be checked.
Color should be evaluated.
Viscosity should be checked.
The density must be controlled.
If the amount of water is required, it should be examined.
The acid value should be checked.
Polymer compatibility should be tested.
The plasticizer level must be optimized.
Tg change should be measured.
Hardness should be checked.
Migration test should be performed.
Extraction strength should be evaluated.
Plastisol viscosity should be followed.
Gel behavior should be studied.
The coating film properties should be tested.
The flash point should be taken from the exact SDS.
Target market legislation should be checked.
ECHA/REACH status should be examined.
TDS should be checked.
SDS should be examined.
The COA must be verified.
There are evaluation activities for Kronitex KP-140 within the scope of ECHA.
Therefore, when planning for long-term use in the European market, one should not rely solely on historical business practice information.
Current REACH, CLP and customer restricted substance lists should be checked regularly.
INITIAL FORMULATION APPROACHES FOR KRONITEX KP-140
The following examples are laboratory initial approaches designed to illustrate how Kronitex KP-140 can be evaluated during technical product development. These are not validated commercial recipes.
The level of use should be determined by laboratory screening according to the target polymer, process and end product properties.
EXAMPLE 1: KRONITEX KP-140 PVC PLASTIC VISCOSITY SCREENING
Purpose: To compare the effect of Kronitex KP-140 level on initial viscosity, gel behavior and final PVC flexibility.
Starting components:
PVC plastisol resin: 60.0%
Main plasticizer: 25.0%
Kronitex KP-140: 10.0%
Stabilizer: 2.0%
Filling: 2.0%
Pigment: 1.0%
Total: 100%
Application approach:
PVC resin is used in the same batch.
The proportions of the main plasticizer and Kronitex KP-140 are determined.
Mixtures are prepared under the same cutting conditions.
The initial viscosity is measured.
After 24 hours of aging, the viscosity is measured again.
The gel temperature is compared.
Standard film is prepared.
Shore hardness is measured.
Low-temperature flexibility is examined.
Tensile and elongation are compared.
Surface migration is followed.
EXAMPLE 2: KRONITEX KP-140 FLOOR POLISH FILM FLEXIBILITY SCAN
Purpose: To evaluate the effect of Kronitex KP-140 level on film hardness, flexibility, gloss, and surface resistance.
Starting components:
Film-forming polymer dispersion: 70.0%
Kronitex KP-140: 5.0%
Wax dispersion: 8.0%
Surfactant: 1.0%
Foam control additive: 0.5%
Water: 15.5%
Total: 100%
Application approach:
All samples are set to the same solids ratio.
Kronitex KP-140 is added in a controlled manner.
The film is applied to the standard substrate with the same thickness.
Drying time is recorded.
Brightness is measured.
Film hardness is compared.
Flexibility test is performed.
Scratch resistance is evaluated.
Dirt retention behavior is checked.
Surface adhesion is examined at the high plasticizer level.
EXAMPLE 3: KRONITEX KP-140 SYNTHETIC RUBBER PLASTICIZER SCAN
Objective: To determine the effect of Kronitex KP-140 use on compound viscosity, hardness and low temperature behavior.
Starting components:
Synthetic rubber: 59.0%
Filling system: 25.0%
Kronitex KP-140: 10.0%
Processing aids: 3.0%
Curing system: 3.0%
Total: 100%
Application approach:
Masterbatches are prepared under the same mixer conditions.
Mixer torque is recorded.
Compound Mooney viscosity is measured.
Curing characteristics are checked.
Standard vulcanized samples are prepared.
Shore hardness is measured.
Tensile strength and elongation at break are determined.
Low-temperature flexibility is compared.
Plasticizer surface migration is observed.
Extraction behavior in liquid contact is examined.
ALTERNATIVES AND COMPARISON OF KRONITEX KP-140
When choosing a Kronitex KP-140 alternative, not only its liquid plasticizer properties should be considered. Phosphorus content, polarity, water solubility, volatility, polymer compatibility, and legislation should be evaluated together.
KRONITEX KP-140 AND TRIBUTYL PHOSPHATE
Kronitex KP-140, aka TBP, is another phosphate ester.
In Kronitex KP-140, butyl chains are directly attached to the phosphate group.
In Kronitex KP-140, on the other hand, additional ether oxygens are present in the butoxyethyl chains.
This structure alters the polarity of Kronitex KP-140 and its interaction with resins.
Kronitex KP-140 has a lower molecular weight and different volatility profile.
The two products should not be substituted directly in the same amount.
KRONITEX KP-140 AND TRIS(2-ETHYLHEXYL) PHOSPHATE
Kronitex KP-140, or TEHP, is also a phosphate ester plasticizer.
The long branched alkyl chains of TEHP form a more hydrophobic structure.
Kronitex KP-140, on the other hand, shows a more polar character due to its three ether oxygens.
Kronitex KP-140 water solubility is lower than Kronitex KP-140.
Both products can have a plasticizer and flame retardant function in certain systems, but their compatibility and viscosity behavior are not the same.
KRONITEX KP-140 AND TRIPHENYL PHOSPHATE
Kronitex is KP-140 i.e. TPP aromatic phosphate ester.
Kronitex KP-140 has a solid and aromatic structure, while Kronitex KP-140 is a phosphate ester with liquid aliphatic/ether function.
TPP can provide higher hardness and different flame retardant performance.
Kronitex KP-140, on the other hand, can provide an advantage in systems where low viscosity is required with its liquid form and strong plasticizing feature.
It should not be considered directly equivalent.
KRONITEX KP-140 AND PHTHALATE PLASTICIZERS
Phthalate plasticizers are very commonly used ester plasticizers in PVC and other polymers.
Kronitex KP-140 is a phosphate ester and contains phosphorus.
Therefore, its flammability and polarity profile are different from that of classical phthalates.
In the evaluation of phthalate alternatives, not only plasticizing efficiency but also migration, toxicology and legislation should be compared.
KRONITEX KP-140 AND POLYMERIC PLASTICIZERS
Polymeric plasticizers can be polyester-type plasticizers with a much higher molecular weight.
Polymeric products can generally achieve lower migration and extraction.
In return, their viscosity can be much higher and the plasticizing efficiency can vary.
Kronitex KP-140 can provide ease of process as it is a low viscosity monomeric plasticizer, but polymeric alternatives may be more suitable in applications where high migration strength is required.
QUALITY CONTROL AND PURCHASING CRITERIA FOR KRONITEX KP-140
When purchasing Kronitex KP-140, not only the trade name, but also the actual Kronitex KP-140 quality and current technical specification should be evaluated.
Recommended information to review before purchasing:
Full commercial product name
Manufacturer
Kronitex KP-140 ID
CAS No
EC/EINECS No
Purity
Color
Outlook
Density
Viscosity
Refractive index
Amount of water
Acid value
Phosphorus content
Tributyl Phosphate impurity
2-Butoxyethanol impurity
Other organic impurities
Flash point
Storage conditions
Shelf life
Packaging Type
Batch number
Production date
Information of origin
TDS
SDS
COA
REACH registration information
CLP classification
Customer restricted substance list requirements
The COA should display the parameters of the actual batch, such as purity, color, water, and acid value where necessary.
Laboratory type Kronitex KP-140 products may have assay values of 94-95% and above.
For a commercial grade similar to Industrial Kronitex KP-140, the exact purity must be obtained from the supplier certificate.
Since approximately 3% Tributyl Phosphate impurities were reported in the technical Kronitex KP-140 in the old literature, it is not correct to apply this historical value to all current products.
When switching to a new supplier, viscosity, film performance, migration and color should be compared.
STORAGE AND HANDLING OF KRONITEX KP-140
Storage: Kronitex KP-140 should be stored in dry, clean, and chemically compatible sealed packaging.
Temperature: Due to its low freezing point, it remains liquid at normal storage temperature. It should not be kept at unnecessarily high temperatures for a long time.
Moisture: The packaging should be kept closed to prevent the ingress of water and foreign substances.
Contamination: Cross-contamination with other plasticizers, acids, bases or process chemicals must be avoided.
Transfer: Enclosed pump and transfer systems can reduce worker exposure and spillage risk.
Spillage: Despite the low volatility, spills should be properly contained, as the liquid product can create a slippery surface.
Transport: The exact transport classification must be verified from the current SDS document.
SDS information for historical or other Kronitex KP-140 products should not be used in place of the current document of Kronitex KP-140.
KRONITEX KP-140 SAFETY INFORMATION
Kronitex KP-140 is a liquid organophosphate ester with low volatility.
Inhalation exposure at normal temperature may be lower than that of solvents with high volatility.
However, skin contact and splashes can be important routes of workplace exposure.
Appropriate personal protective equipment should be used to limit eye and skin contact.
In heated processes, the formation of vapors or aerosols can create exposure conditions that differ from normal ambient temperature.
The environmental and toxicological profile of Kronitex KP-140 should be evaluated on the basis of current SDS and REACH information.
ECHA records include current dossier evaluation and regulatory-needs evaluation activities for Tris(2-butoxyethyl) Phosphate.
For this reason, the regulatory status should be checked periodically, especially in long-term product development in Europe.
WHAT SHOULD BE CONSIDERED WHEN BUYING KRONITEX KP-140?
In the procurement of Kronitex KP-140, the polymer or coating system in which the product will be used should be determined first.
Priority specifications may be different in plastisol, floor polish, rubber or resin system.
Not only the old Kronitex name must be specified when ordering, but also the ID Kronitex KP-140 and CAS 78-51-3.
The following information should be clarified before purchasing:
Use sector
Final application
Application of PVC plastisol
Floor polish application
Rubber application
Application of coatings or resins
Kronitex KP-140 exact ID
Minimum purity
Color limit
Viscosity range
Density
Water limit
Acid value
Phosphorus content
Desired migration performance
Target plasticization level
Flame retardancy expectation
Manufacturer
Origin
Packaging
Estimated order quantity
The need for TDS
The need for SDS
The need for COA
REACH information
If substitution is to be made with the existing product, the existing TDS and COA
The price of Kronitex KP-140 should not be compared only with the price of kilograms.
Plasticizing efficiency, required amount of use, viscosity effect and migration performance affect the actual formula cost.
Even if another Kronitex KP-140 product has the same CAS number, the purity and process behavior must be compared.
KRONITEX KP-140 SUPPLY FROM ATAMAN KIMYA
Kronitex KP-140; Tris(2-butoxyethyl) Phosphate based phosphate ester that can be evaluated as a plasticizer and process additive in plastic, rubber, plastisol, floor care and various technical resin systems.
Companies that want to get information about the supply of Kronitex KP-140 or equivalent Kronitex KP-140 from Ataman Kimya can request information about product suitability, current supply conditions, packaging options and price offer by sharing their usage areas and target technical specifications.
The current stock status, manufacturer, trade name, origin, purity, packaging and technical specifications of the product should be confirmed from Ataman Kimya before ordering.
Sharing the following information in the request for quotation facilitates the evaluation of the right Kronitex KP-140 product:
Use sector and end application
Kronitex KP-140 exact trade name requirement or Kronitex KP-140 equivalent acceptance
Requirement of CAS No 78-51-3
Minimum purity
Color limit
Viscosity expectation
Density requirement
Acid value requirement
Phosphorus content requirement
Estimated order quantity
Type of packaging requested
Requested technical documents
TDS or COA information of the current Kronitex KP-140 product, if applicable
FREQUENTLY ASKED QUESTIONS ABOUT KRONITEX KP-140
What is Kronitex KP-140?
Kronitex KP-140 is one of the trade names for Tris(2-butoxyethyl) Phosphate i.e. Kronitex KP-140.
What is the chemical name of Kronitex KP-140?
Tris(2-butoxyethyl) is Phosphate.
What is the CAS number of the Kronitex KP-140?
CAS No is 78-51-3.
What is the EC number of the Kronitex KP-140?
EC / EINECS No is 201-122-9.
What is the molecular formula of Kronitex KP-140?
C₁₈H₃₉O₇P.
What is the molecular weight of Kronitex KP-140?
It is approximately 398.47 g/mol.
Is Kronitex KP-140 a phosphate ester?
It is an organic phosphate triester.
Is Kronitex KP-140 a liquid?
It is colorless to light yellow viscous liquid at room temperature.
What is the density of Kronitex KP-140?
It is approximately 1.00–1.02 g/mL.
What is the viscosity of Kronitex KP-140?
About 11–15 mPa·s, around 20 °C.
What is the freezing point of Kronitex KP-140?
It is about -70 °C.
Is Kronitex KP-140 soluble in water?
It has limited solubility. Values of approximately 1.1–1.3 g/L, 20 °C have been reported.
Is Kronitex KP-140 volatile?
Its vapor pressure is very low and its volatility is limited at room temperature.
What does Kronitex KP-140 do?
It can be used as a plasticizer, plastisol viscosity regulator, solvent/co-solvent in some resins, and as an antifoam or phosphorous flame retardant additive in some applications.
Can Kronitex KP-140 be used in PVC?
Kronitex KP-140 can be used for viscosity regulation and plasticization, especially in PVC plastisols.
Can Kronitex KP-140 be used in rubber?
It can be used as a plasticizer in synthetic rubbers.
Can Kronitex KP-140 be used in floor polishing products?
In international sources, floor polish is stated as one of the main usage areas of Kronitex KP-140.
What does Kronitex KP-140 do in plastisols?
It can help adjust the liquid phase viscosity and plasticizing behavior.
Is Kronitex KP-140 flame retardant?
Due to its phosphorus-containing structure, it can be used as a flame-retardant plasticizer in some systems. Actual flame performance depends on the polymer and usage rate.
Can Kronitex KP-140 be used as antifoam?
International sources also report the use of antifoam for Kronitex KP-140.
Are Kronitex KP-140 and Kronitex KP-140 the same?
Kronitex KP-140 is one of the trade names used for Kronitex KP-140.
KRONITEX KP-140 – TECHNICAL SUMMARY
Kronitex KP-140 is one of the trade names used for Tris(2-butoxyethyl) Phosphate, i.e. Kronitex KP-140. The product identified by CAS No 78-51-3 and EC No 201-122-9 is an organic phosphate ester.
Kronitex KP-140 has a molecular formula of C₁₈H₃₉O₇P and a molecular weight of approximately 398.47 g/mol. It contains three 2-butoxyethyl chains attached to the central phosphate group.
The product is light-colored viscous liquid at room temperature. At about 20 °C, it shows a viscosity of 11–15 mPa·s, a density of about 1.02 g/mL, and a water solubility of 1.1–1.3 g/L.
The freezing point of approximately -70 °C and the very low vapor pressure contribute to Kronitex KP-140 remaining liquid over a wide temperature range and exhibiting low volatility at normal temperature.
Kronitex KP-140 can be used in floor polishes, synthetic rubbers, plastics, lacquers and plastisols. Its main functions are plasticization, regulation of plastisol viscosity, solvent/co-solvent function in certain resins and foam control in some systems.
Due to its phosphate ester structure, Kronitex KP-140 can also be considered as a flame-retardant plasticizer in some applications. However, it should not be claimed that a certain fire class will be obtained solely based on the use of Kronitex KP-140.
As a plasticizer, it can increase the mobility of polymer chains, helping to reduce stiffness and glass transition temperature, improving flexibility and low-temperature behavior.
Physical property values for Kronitex KP-140 may vary slightly depending on the source and technical grade. In particular, the purity, flash point and impurity profile should be verified from the exact commercial product's TDS, SDS and COA documents.
Since Kronitex KP-140 is a historical trade name, it should not be assumed that all Kronitex KP-140 products with the same CAS number will be marketed as Kronitex KP-140 today. Exact commercial product demand and chemical equivalent Kronitex KP-140 demand should be separated from each other during the purchasing process.
Companies planning to procure Kronitex KP-140 or Kronitex KP-140 from Ataman Kimya are recommended to confirm the current product and offer conditions by sharing their usage area, minimum purity, viscosity and color requirements, packaging quantity, exact trade-name needs and technical document expectations.
