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Formulators and procurement teams searching for CAS 1541-67-9 usually look past basic chemical definitions. You are likely evaluating Lauryldiethanolamine (LDEA) for a specific manufacturing run. We know modern formulation demands strict performance metrics. This compound acts as a tertiary amine and a highly effective nonionic surfactant. Interestingly, it exhibits mild cationic behavior when placed in acidic environments. Chemists and production managers value it heavily for its exceptional emulsifying, thickening, and antistatic properties. Choosing the right surfactant dictates your final product stability, sensory profile, and shelf life. A poorly sourced amine can quickly ruin an entire batch. This guide breaks down the essential technical specifications and practical implementation challenges of LDEA. We will also outline critical criteria for evaluating commercial suppliers globally. You will learn how to integrate this chemical safely and efficiently into your production lines to maximize yield and performance.
Procurement confusion often arises from the myriad of names used in global supply chains. Establishing a baseline identification prevents costly purchasing errors. The standard nomenclature for this compound is N,N-bis(2-hydroxyethyl)dodecan-1-amine. Industry professionals most commonly refer to it as Lauryl diethanolamine. You might also see it listed under trade names specific to various chemical distributors, but relying on CAS 1541-67-9 ensures exact material matching across international borders.
Understanding the physical characteristics of this amine is crucial for manufacturing setup. Depending on your facility's ambient temperature, the compound appears as a clear to pale yellow liquid or a soft paste. It possesses a molecular weight of 273.46 g/mol. Its structural traits include a long 12-carbon hydrophobic tail attached to a hydrophilic diethanolamine head group. This distinct amphiphilic structure gives the molecule its powerful surface-active properties.
The solubility profile dictates how you integrate it into different formulation phases. The chemical is moderately soluble in water but dissolves readily in organic solvents like ethanol and ether. When formulating aqueous systems, you must introduce it under adequate shear to ensure proper micelle formation. If you bypass proper mixing protocols, you risk phase separation in the final product.
Surfactant dynamics change based on the environment. Primarily, we classify this chemical as a nonionic surfactant. However, the nitrogen atom in the amine group undergoes protonation when the system pH drops below 6.0. Under these acidic conditions, the molecule shifts and exhibits cationic behavior. This unique duality provides massive chemical versatility but requires precise pH control during the blending process.
Table 1: Standard Physical and Chemical Properties
| Property | Standard Specification |
|---|---|
| Chemical Name | Lauryl diethanolamine (N,N-bis(2-hydroxyethyl)dodecan-1-amine) |
| Molecular Weight | 273.46 g/mol |
| Appearance at 25°C | Clear to pale yellow liquid/paste |
| Solubility | Dispersible in water; Soluble in alcohols |
| Surfactant Type | Nonionic (Cationic in acidic media) |
Formulators select CAS 1541-67-9 to solve specific formulation problems. It rarely acts as the primary cleansing agent. Instead, it plays a vital supporting role to enhance the performance of primary surfactants.
Consumers judge shampoos, body washes, and liquid detergents by their thickness and lather. Thin, watery products feel cheap. This compound excels at building viscosity in aqueous systems. It interacts synergistically with primary surfactants like Sodium Laureth Sulfate (SLES) to create a dense, stable foam lattice. The amine fortifies the bubble structure, preventing the lather from collapsing when it contacts skin oils or hard water. This directly improves the sensory profile of the consumer product, increasing brand perception and customer satisfaction.
Modern textile manufacturing relies on high-speed spinning operations. Synthetic fibers generate massive amounts of static electricity during this process. Static causes fibers to repel each other, leading to yarn breakage and machine jams. Lauryldiethanolamine functions as an exceptional antistatic agent in spin finishes. It absorbs moisture from the air, creating a micro-conductive layer on the fiber surface that safely dissipates electrical charges. Additionally, its long alkyl chain provides essential boundary lubrication, reducing friction between the fiber and the metal machinery.
Metalworking fluids require stable oil-in-water emulsions to cool and lubricate cutting tools. The emulsifying strength of this amine prevents oil droplets from coalescing, extending the fluid's operational lifespan. Furthermore, the amine groups interact with metal surfaces to form a protective monomolecular film. This film offers mild but effective corrosion inhibition, preventing flash rust on newly machined iron and steel parts.
Chemists often compare this chemical to other alkanolamides, notably Cocamide DEA. While both build viscosity and boost foam, their structural differences matter.
Theoretical chemistry only takes you so far. Moving a formulation from the lab bench to a 10,000-liter mixing tank exposes practical risks. Successful integration requires a deep understanding of compatibility constraints.
Blending surfactants always carries the risk of antagonistic reactions. Because this amine acts nonionically at a neutral pH, it blends easily with anionic, cationic, and amphoteric surfactants. However, complications arise if the system drops into the acidic range. The protonated (cationic) amine can react forcefully with strong anionic surfactants. This interaction often forms an insoluble coacervate complex. When this happens, the mixture turns cloudy, and the active ingredients precipitate out of the solution, ruining the batch.
Formulation pH directly dictates the chemical's efficacy. You cannot simply add the surfactant and hope for the best. Precise buffering is mandatory. If you need it to function purely as a nonionic thickener, you must maintain a pH above 7.0. If you desire its substantive conditioning properties on hair or textiles, you must carefully drop the pH to protonate the nitrogen, while ensuring you do not trigger precipitation with other ingredients. Continuous pH monitoring during the mixing phase prevents unexpected phase shifts.
Manufacturing protocols often require heating to integrate pastes and waxes. However, thermal stability is a known limitation. Heating the compound above 80°C for extended periods accelerates oxidative degradation. This degradation manifests visually as a darkening of the liquid, significantly increasing its APHA color value. If you formulate clear shampoos or light-colored textiles, this discoloration is unacceptable. You should add this surfactant during the cool-down phase of manufacturing, ideally below 45°C, to preserve its color and chemical integrity.
Experienced formulators worry intensely about trace impurities. The synthesis of this chemical often leaves residual secondary amines, specifically unreacted diethanolamine (DEA). If your formulation contains nitrosating agents (like certain preservatives or nitrogen oxides from the air), the free DEA can react to form nitrosamines. Nitrosamines are potent carcinogens strictly regulated worldwide. You mitigate this risk exclusively by sourcing high-purity grades of CAS 1541-67-9 with guaranteed low levels of unreacted amines.
Facility rollout requires strict adherence to Safety Data Sheet (SDS) guidelines. Mishandling this concentrated surfactant puts your workforce and the environment at risk.
In its concentrated form, the chemical is an irritant. Standard SDS data flags it for causing severe skin irritation and risking serious eye damage upon contact. Inhalation of its vapors or mists during heated processes can irritate the respiratory tract. Facility managers must enforce strict PPE usage. Operators handling the raw material must wear chemical splash goggles, heavy-duty nitrile gloves, and protective aprons. Local exhaust ventilation is an essential engineering control when pumping or mixing the bulk liquid.
Fatty amine derivatives carry specific environmental hazards. Regulatory bodies classify this compound as highly toxic to aquatic life, often carrying long-lasting effects. You cannot discharge untreated wash water into municipal sewers. Facilities must route rinse water from mixing tanks through dedicated wastewater treatment systems designed to break down long-chain amines. Understanding this aquatic toxicity is crucial if your brand pursues eco-labeling or biodegradable certifications, as high concentrations of this chemical may disqualify your final product.
Proper storage prevents premature chemical degradation. You must store drums in a cool, dry, and well-ventilated warehouse. Temperature control matters; storing it below freezing can cause it to solidify completely, requiring gentle, controlled heating to re-liquefy. Conversely, hot warehouses accelerate oxidation. For bulk storage tanks, engineers highly recommend nitrogen blanketing. Displacing the oxygen in the tank headspace prevents the amine from oxidizing over time. Keep the chemical strictly away from strong acids and oxidizing agents. Under optimal conditions, the standard shelf life spans 12 to 24 months.
Your end product is only as good as your raw materials. Treating chemical procurement as a simple price-shopping exercise frequently leads to manufacturing disasters. You must rigorously evaluate commercial suppliers.
What distinguishes a reliable chemical distributor from a high-risk vendor? A reliable partner controls their supply chain from synthesis to delivery. They do not buy aged lots on the spot market. They provide immediate technical support and maintain climate-controlled storage facilities. High-risk vendors often obscure the original manufacturer, delay providing technical documentation, and offer prices that seem suspiciously below market average.
The Certificate of Analysis is your primary defense against bad material. Never accept a shipment without reviewing a batch-specific CoA. Buyers must verify several non-negotiable metrics:
A supplier must match your growth trajectory. Evaluate their packaging options. Can they transition you smoothly from 200-liter drums to 1,000-liter IBC totes as your production scales? Furthermore, assess their inventory consistency. Global shipping compliance for chemicals requires specialized logistics. Ask potential suppliers about their average lead times and their contingency plans for supply chain disruptions.
Always shortlist suppliers holding active ISO 9001 certifications. This certification proves they follow standardized procedures for handling out-of-spec materials and customer complaints. Traceability is paramount. A quality supplier can trace any drum in your facility back to the exact synthesis batch, providing absolute transparency if a formulation issue arises on your production floor.
Successful adoption of this versatile chemical requires a balanced approach. You must leverage its excellent emulsifying and viscosity-building properties while carefully managing formulation pH and compatibility constraints. The risks associated with trace impurities demand rigorous quality control protocols.
Your next step is to evaluate how this material behaves in your specific system. Contact your shortlisted suppliers to request a comprehensive technical data sheet (TDS). Download sample formulations for your industry, and secure a batch-specific CoA alongside a physical sample for your lab to begin bench testing.
A: The compound is most frequently referred to as Lauryldiethanolamine or LDEA. Standard IUPAC nomenclature lists it as N,N-bis(2-hydroxyethyl)dodecan-1-amine. You may also encounter it as N,N-bis(2-hydroxyethyl)dodecylamine in some procurement databases. Using the CAS registry number is the best way to ensure exact chemical matching.
A: Yes, but it depends entirely on the pH. At a neutral or alkaline pH, it acts nonionically and blends perfectly with anionic surfactants like SLES. However, in acidic conditions (pH below 6.0), it turns cationic and may precipitate or form insoluble complexes with anionics.
A: When stored correctly in unopened containers, the standard shelf life is typically 12 to 24 months. You must store it in a cool, dry, well-ventilated area away from direct sunlight and strong oxidizing agents. Bulk tanks benefit greatly from nitrogen blanketing to prevent oxidative degradation.
A: Yes, it can be used in REACH-compliant products, provided your specific supplier has completed the necessary registration for their tonnage band. You must directly verify the REACH registration status and specific supply chain compliance with your chosen distributor before purchasing.
