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Pentramethyldipropylenetriamine is a versatile polyamine widely used in industrial and chemical applications for polymer curing, corrosion inhibition, and metal chelation, but it also poses significant hazards such as chemical burns, respiratory irritation, and environmental toxicity if not handled with proper safety precautions.
Pentramethyldipropylenetriamine, often abbreviated as PMDPTA, is a viscous, colorless to pale yellow liquid that belongs to the class of polyamines, which are organic compounds containing multiple amine groups capable of acting as strong bases and nucleophiles, making them highly reactive in various chemical processes.
Pentramethyldipropylenetriamines chemical structure consists of three nitrogen atoms connected by propylene linkers, with five methyl groups attached to the nitrogen atoms, which increases its steric bulk and provides unique reactivity compared to simpler amines.
CAS Number: 3855-32-1
Molecular Formula: C11H27N3
Molecular Weight: 201.35
EINECS Number: 223-362-3
Synonyms: 2,6,10-Trimethyl-2,6,10-triazaundecane, R7P2U5FNE4, DTXSID1044564, 1,3-Propanediamine, N-[3-(dimethylamino)propyl]-N,N',N'-trimethyl-, EINECS 223-362-3, NSC 123346, NSC-123346, Dipropylamine, 3,3'-bis(dimethylamino)-N-methyl-, N-(3-(Dimethylamino)propyl)-N,N',N'-trimethylpropane-1,3-diamine, DTXCID9024564, EC 223-362-3, 1,3-Propanediamine, N-(3-(dimethylamino)propyl)-N,N',N'-trimethyl-, 1,3-Propanediamine, N1-(3-(dimethylamino)propyl)-N1,N3,N3-trimethyl-, PENTAMETHYLIMINOBISPROPYLAMINE, N,N,N'-Trimethyl-N'-(3-(dimethylamino)propyl)-1,3-propanediamine, n-methyl-n,n-bis(3-dimethylaminopropyl)amine, 3,3'-bis(dimethylamino)-n-methyldipropylamine, n,n,n',n'',n''-pentamethyldipropylenetriamine, 3,3'-BIS(DIMETHYLAMINOPROPYL)METHYLAMINE, N,N,N',N',N'-PENTAMETHYLDIPROPYLENETRIAMINE, N,N,N',N',N''-PENTAMETHYLIMINOBIS(PROPYLAMINE), N,N,N',N'',N''-PENTAMETHYLDI-1,3-PROPYLENETRIAMINE, N-[3-(Dimethylamino)propyl]-N,N',N'-trimethylpropane-1,3-diamine, N-(3-(DIMETHYLAMINO)PROPYL)-N,N',N'-TRIMETHYL-1,3-PROPANEDIAMINE, N,N,N'-Trimethyl-N'-[3-(dimethylamino)propyl]-1,3-propanediamine, 1,3-Propanediamine, N1-[3-(dimethylamino)propyl]-N1,N3,N3-trimethyl-, RefChem:445129, 223-362-3, 3855-32-1, MFCD00126936, N'-[3-(dimethylamino)propyl]-N,N,N'-trimethylpropane-1,3-diamine, N-Methyl-N,N-bis[3-(dimethylamino)propyl]amine, pmdpta, C11H27N3, NSC123346, UNII-R7P2U5FNE4, SCHEMBL272639, SCHEMBL915406, CHEMBL3183623, SKCNNQDRNPQEFU-UHFFFAOYSA-N, Tox21_300392, AKOS015915211, NCGC00248018-01, NCGC00254536-01, BS-22815, CAS-3855-32-1, CS-0197199, NS00005865, T1618, Dipropylamine,3'-bis(dimethylamino)-N-methyl-, E78147, F633785, 1, N-[3-(dimethylamino)propyl]-N,N',N'-trimethyl-, Q27893988, propane, 1-dimethylamino-3-(3-dimethylamino)propylmethylamino-, N'-[3-(dimethylamino)propyl]-N,N,N'-trimethyl-propane-1,3-diamine, N,N'-Trimethyl-N'-[3-(dimethylamino)propyl]-1,3-propanediamine 2,6,10-TRIMETHYL-2,6,10-TRIAZAUNDECANE;N-(3-(DIMETHYLAMINO)PROPYL)-N,N',N'-TRIMETHYLPROPANE-1,3-DIAMINE;N,N,N',N',N''-PENTAMETHYL DIPROPYLENE TRIAMINE;N,N,N',N'',N''-PENTAMETHYLDIPROPYLEN-TRIAMIN;N-METHYL-N,N-BIS[3-(DIMETHYLAMINO)PROPYL]AMINE;3-Propanediamine,N-[3-(dimethylamino)propyl]-N,N’,N’-trimethyl-1;N,N,N’-Trimethyl-N’-[3-(dimethylamino)propyl]-1,3-propanediamine;n-[3-(dimethylamino)propyl]-n,n’,n’-trimethyl-3-propanediamine
Pentramethyldipropylenetriamine is commonly used as a curing agent or accelerator in the production of epoxy resins, polyurethane coatings, and adhesives, because its multiple amine groups can effectively react with epoxy or isocyanate functional groups to create cross-linked polymer networks, enhancing the mechanical strength, chemical resistance, and thermal stability of the final materials.
Beyond industrial polymer chemistry, Pentramethyldipropylenetriamine is also employed as a chelating agent, corrosion inhibitor, and intermediate in the synthesis of specialty chemicals, taking advantage of its ability to bind metal ions and stabilize formulations.
From a chemical handling perspective, Pentramethyldipropylenetriamine is highly reactive, strongly basic, and capable of causing severe irritation upon contact with skin, eyes, or mucous membranes, so protective equipment such as gloves, goggles, and adequate ventilation is required when working with the substance.
Pentramethyldipropylenetriamine is flammable under certain conditions, and its vapors or aerosols can cause respiratory discomfort or sensitization in sensitive individuals, highlighting the need for careful storage, typically in sealed containers away from heat, oxidizing agents, and acids.
Environmentally, Pentramethyldipropylenetriamine should be handled cautiously, as spills or large discharges into waterways may be harmful to aquatic life due to its strong basicity and potential to form reactive complexes with metals, making proper containment, neutralization, and disposal essential for safety and regulatory compliance.
Pentramethyldipropylenetriamine is a highly reactive tertiary polyamine that is widely used in industrial chemistry due to its multiple nitrogen atoms, which provide it with strong nucleophilic and basic properties.
Its molecular structure, consisting of three nitrogen atoms connected by propylene bridges and substituted with five methyl groups, gives it a unique combination of steric hindrance and electron-donating characteristics, allowing it to efficiently participate in a wide range of chemical reactions.
In the field of polymer chemistry, Pentramethyldipropylenetriamine is particularly valued as a curing agent for epoxy resins and polyurethanes, where it acts as a hardener by reacting with epoxy or isocyanate groups to form cross-linked polymer networks, improving the mechanical strength, chemical resistance, and thermal stability of coatings, adhesives, and composite materials.
Additionally, Pentramethyldipropylenetriamine is used as a reactive intermediate in the synthesis of specialty chemicals, surfactants, corrosion inhibitors, and chelating agents, taking advantage of its ability to coordinate with metal ions and enhance the stability of formulations.
From a handling and safety perspective, Pentramethyldipropylenetriamine is strongly alkaline and can cause severe chemical burns upon contact with skin or eyes, while inhalation of vapors or aerosols can irritate the respiratory system, potentially leading to coughing, shortness of breath, or sensitization.
Pentramethyldipropylenetriamine is also flammable under certain conditions and may react violently with strong oxidizers, acids, or halogenated compounds, which makes proper storage, containment, and personal protective equipment essential during its use.
Boiling point: 102 °C / 1 mmHg
Density: 0.83 g/cm³
Vapor pressure: 2 hPa at 10 °C
Refractive index: 1.4450–1.4480
Flash point: 92 °C
Storage temperature: 2–8 °C, protect from light
Form: Clear liquid
pKa: 9.88 ± 0.28 (Predicted)
Color: Colorless to Yellow to Green
Odor: Fishy odor
Water solubility: 193.9 g/L at 25 °C
InChI: InChI=1S/C11H27N3/c1-12(2)8-6-10-14(5)11-7-9-13(3)4/h6-11H2,1-5H3
InChIKey: SKCNNQDRNPQEFU-UHFFFAOYSA-N
SMILES: C(N(CCCN(C)C)C)CCN(C)C
LogP: 0 (at 25 °C)
Pentramethyldipropylenetriamine is considered hazardous to aquatic organisms due to its high basicity and reactivity with metals, meaning that accidental release into water systems could result in localized chemical toxicity.
Therefore, spill containment, neutralization, and compliant disposal methods are critical to minimize environmental impact.
In addition, due to its reactive amine groups, Pentramethyldipropylenetriamine can participate in secondary reactions during storage or in formulations, potentially leading to the formation of degradation products if exposed to heat, moisture, or reactive chemicals, which highlights the importance of proper storage in tightly sealed containers under cool, dry, and well-ventilated conditions.
Pentramethyldipropylenetriamine is a versatile and industrially important polyamine with numerous applications in polymer production, chemical synthesis, and corrosion inhibition, but it requires careful handling due to its corrosive nature, flammability risks, and environmental toxicity.
Pentramethyldipropylenetriamine is a tertiary polyamine characterized by three nitrogen atoms connected via propylene linkages and substituted with five methyl groups, giving it both high nucleophilicity and strong basicity.
Its chemical formula is C11H27N3, and it is typically a colorless to pale yellow, viscous liquid with a strong amine odor.
The multiple amine groups in its structure allow it to act as a cross-linking agent, a chelating agent, and a reactive intermediate in various chemical syntheses, which makes it highly valuable in industrial applications.
In polymer chemistry, Pentramethyldipropylenetriamine is extensively used as a curing agent or accelerator for epoxy resins, polyurethanes, and other thermosetting polymers, where its multiple amine functionalities react with epoxide or isocyanate groups to form strong, highly cross-linked networks.
This reaction improves the mechanical strength, chemical resistance, adhesion, and thermal stability of coatings, adhesives, sealants, and composites.
Pentramethyldipropylenetriamine also functions as a chain extender or hardener in polyurethane foams, controlling the rigidity, elasticity, and durability of the final product.
Pentramethyldipropylenetriamine is employed as a corrosion inhibitor, surfactant intermediate, and chelating agent in industrial water treatment, detergents, and metal processing, due to its ability to coordinate with metal ions and stabilize chemical formulations.
Pentramethyldipropylenetriamine can also act as a reactive intermediate in the production of specialty amines, agrochemicals, and pharmaceutical intermediates, where its nucleophilic nitrogen atoms participate in alkylation, acylation, and other substitution reactions.
From a physical and chemical standpoint, Pentramethyldipropylenetriamine is miscible with water, alcohols, and many organic solvents, and it is highly alkaline, which makes it reactive with acids, oxidizers, and halogenated compounds.
Pentramethyldipropylenetriamine is stable under dry, cool storage conditions, but may degrade or react upon prolonged exposure to heat, light, or moisture, forming secondary amine products or causing off-gassing.
Pentramethyldipropylenetriamine is strongly corrosive and can cause severe burns to the skin, eyes, and mucous membranes, while inhalation of vapors or aerosols may result in respiratory irritation, coughing, or sensitization in sensitive individuals.
Pentramethyldipropylenetriamine is flammable under certain conditions, especially when in contact with oxidizing agents, and it may release toxic fumes if heated to decomposition.
Proper personal protective equipment (PPE), such as chemical-resistant gloves, goggles, and ventilated enclosures, is essential when handling this compound.
Environmentally, Pentramethyldipropylenetriamine is toxic to aquatic life due to its strong alkalinity and ability to form reactive complexes with metals, which can alter pH and metal bioavailability in water systems.
Spills should be contained immediately, neutralized with weak acids, and disposed of according to local regulations to prevent environmental contamination.
In conclusion, Pentamethyldipropylenetriamine is a highly versatile polyamine with critical roles in polymer curing, metal treatment, chemical synthesis, and industrial formulations, but it must be handled with extreme care due to its corrosive, reactive, flammable, and environmentally hazardous properties.
Its wide industrial utility is balanced by the need for strict safety measures, proper storage, and responsible disposal practices.
Uses:
Pentramethyldipropylenetriamine is primarily utilized in polymer chemistry as a curing agent and accelerator for epoxy resins and polyurethane systems, where its multiple amine groups react with epoxy or isocyanate functional groups to form highly cross-linked polymer networks, resulting in enhanced mechanical strength, chemical resistance, and thermal stability of coatings, adhesives, sealants, and composite materials.
In industrial coating formulations, Pentramethyldipropylenetriamine not only improves adhesion to various substrates such as metals, plastics, and wood, but also modifies the curing kinetics to control the hardness, flexibility, and toughness of the final product, making it a critical additive for both protective and decorative applications.
In addition to its role in polymers, Pentramethyldipropylenetriamine is widely used as a chelating agent and metal complexing intermediate, where it binds to metal ions such as copper, iron, or zinc, helping to prevent corrosion, stabilize emulsions, or enhance the performance of detergents and water treatment chemicals.
Its strong nucleophilic properties also allow it to act as a reactive intermediate in the synthesis of specialty amines, surfactants, agrochemicals, and pharmaceutical intermediates, where it can participate in alkylation, acylation, and other substitution reactions to produce target compounds with improved reactivity or solubility.
Furthermore, Pentramethyldipropylenetriamine is employed in adhesive formulations and sealants to improve bond strength, flexibility, and resistance to chemical attack, particularly in industrial or high-performance applications such as aerospace composites, marine coatings, and automotive parts.
In polyurethane foam production, it serves as a chain extender or hardener, influencing cell structure, density, and mechanical properties, allowing manufacturers to produce foams ranging from flexible cushioning materials to rigid insulation panels.
Its versatility extends to corrosion inhibition, where Pentramethyldipropylenetriamine forms protective complexes on metal surfaces, reducing oxidation and surface degradation in industrial piping, cooling systems, and metal-working fluids.
Additionally, because of its solubility in water and organic solvents, and its strong basicity, Pentramethyldipropylenetriamine is sometimes used in specialty chemical formulations where pH adjustment, nucleophilic reactivity, or complexation of metal ions is required.
In summary, the uses of Pentramethyldipropylenetriamine span polymer curing, adhesive and coating enhancement, foam production, chelation, corrosion inhibition, and chemical synthesis, with its multifunctional amine groups providing the reactivity and versatility needed to improve performance, durability, and chemical stability across a wide range of industrial applications.
Pentramethyldipropylenetriamine is highly valued in industrial polymer applications because its multiple reactive amine groups enable it to function not only as a curing agent for epoxy resins but also as a modifier of cross-linking density, which allows manufacturers to fine-tune the mechanical, thermal, and chemical resistance properties of finished polymer products, making it indispensable in coatings, adhesives, sealants, and composite materials used in demanding environments such as aerospace, automotive, and marine industries.
Its ability to accelerate curing reactions and promote uniform cross-linking also reduces production times and ensures consistent quality in high-volume manufacturing processes.
In polyurethane foam formulations, Pentramethyldipropylenetriamine serves as a chain extender and hardener, which significantly influences foam morphology, cell size distribution, density, flexibility, and overall mechanical performance, enabling the production of both rigid insulation panels and flexible cushioning materials while maintaining long-term dimensional stability and resistance to environmental stressors.
The compound’s water and solvent solubility also make it suitable for aqueous and solvent-based polyurethane systems, expanding its versatility in different industrial formulations.
Beyond polymers, Pentramethyldipropylenetriamine is employed as a chelating agent and metal complexing intermediate in industrial water treatment, metal processing, and cleaning formulations, where it binds with metal ions such as copper, iron, and zinc to prevent scale formation, inhibit corrosion, and stabilize emulsions or suspensions, which prolongs equipment life and maintains the effectiveness of chemical treatments.
It is also utilized as a reactive intermediate in the production of specialty chemicals, surfactants, agrochemicals, and pharmaceutical intermediates, where its nucleophilic amine groups participate in alkylation, acylation, and other substitution reactions, allowing for the synthesis of compounds with enhanced solubility, reactivity, or bioavailability.
In the adhesive and sealant industry, Pentramethyldipropylenetriamine improves bond strength, chemical resistance, and thermal stability, making it especially useful for high-performance applications such as construction adhesives, structural bonding agents, and sealants exposed to harsh environmental conditions.
Its amine functionality also enables it to act as a corrosion inhibitor by forming a protective layer on metal surfaces, reducing oxidation, rust formation, and surface degradation in industrial piping, cooling systems, and metal-working fluids.
Pentramethyldipropylenetriamine is applied in formulations requiring pH adjustment or nucleophilic reactivity, due to its strong basicity and multi-nitrogen structure, which allows it to interact with reactive components in detergents, coatings, and chemical syntheses, improving stability, reactivity, and performance.
Its multifunctional nature makes it an essential additive for applications where enhanced mechanical, chemical, thermal, or corrosion-resistant properties are critical, demonstrating its versatility across a broad spectrum of industrial sectors.
Safety Profile:
Pentramethyldipropylenetriamineis classified as a highly corrosive and reactive polyamine, and exposure to this chemical can pose significant health risks if not handled properly.
Its high alkalinity and multiple reactive amine groups make it capable of causing severe chemical burns to the skin, eyes, and mucous membranes, and direct contact may result in painful irritation, redness, swelling, and, in severe cases, permanent tissue damage.
Inhalation of Pentramethyldipropylenetriamine vapors, aerosols, or dust can lead to respiratory irritation, coughing, difficulty breathing, and potential sensitization of the respiratory tract, which is particularly concerning in poorly ventilated industrial environments.
Accidental ingestion of Pentramethyldipropylenetriamine is extremely dangerous and may cause burning of the mouth, throat, esophagus, and stomach, along with nausea, vomiting, and systemic toxicity, due to its strong basicity and reactivity.
Pentramethyldipropylenetriamine can also act as a chemical irritant to the eyes, potentially causing severe damage including conjunctivitis, corneal burns, or temporary or permanent vision impairment if appropriate protective measures are not taken.
From a chemical safety perspective, Pentramethyldipropylenetriamine is reactive with acids, oxidizing agents, halogenated compounds, and other reactive chemicals, which can lead to violent reactions, release of toxic gases, or fire hazards under uncontrolled conditions.
Its flammability increases when in contact with oxidizers or when heated, and decomposition may generate toxic fumes containing nitrogen oxides, amines, or other harmful substances.
