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1,8-Diaminooctane

    • Product Name 1,8-Diaminooctane
    • Alias Octamethylenediamine
    • Einecs 211-162-9
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
    • Price Inquiry sales7@sinochem-nanjing.com
    • Manufacturer Sinochem Nanjing Corporation
    • CONTACT NOW
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    Specifications

    HS Code

    744583

    Chemical Name 1,8-Diaminooctane
    Synonyms Octamethylenediamine
    Molecular Formula C8H20N2
    Molar Mass 144.26 g/mol
    Cas Number 373-44-4
    Appearance White to off-white solid
    Melting Point 47-50 °C
    Boiling Point 260 °C
    Density 0.876 g/cm³
    Solubility In Water Slightly soluble
    Pka around 10.7 (primary amine)
    Odor Ammonia-like
    Flash Point 130 °C (closed cup)
    Refractive Index 1.447
    Purity Typically ≥98%

    As an accredited 1,8-Diaminooctane factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing 1,8-Diaminooctane, 100g, is packaged in a sealed amber glass bottle with a secure screw cap and chemical hazard labeling.
    Shipping **Shipping Description for 1,8-Diaminooctane:** 1,8-Diaminooctane should be shipped in tightly sealed containers, protected from moisture and incompatible materials. It must comply with relevant transport regulations, typically classified as corrosive. Ensure proper labeling and documentation. Store in a cool, dry place, and handle with gloves and eye protection to prevent skin or eye contact during shipping and handling.
    Storage 1,8-Diaminooctane should be stored in a tightly sealed container in a cool, dry, and well-ventilated area, away from heat, moisture, and incompatible substances such as strong oxidizers. Protect from physical damage and direct sunlight. Ensure proper labeling and restrict access to trained personnel. Use appropriate chemical storage cabinetry, preferably made of materials resistant to amines, to prevent corrosive interactions.
    Application of 1,8-Diaminooctane

    Applications of 1,8-Diaminooctane in Industrial Manufacturing

    1,8-Diaminooctane plays a key role as a building block and functional intermediate in multiple specialty and polymer sectors. Our production experience confirms its consistent performance across critical industrial operations, addressing unique technical demands for downstream formulation, compliance, and end product quality.

    1. Polyamide and Nylon-8,8 Engineering Plastics

    In advanced polymerization, 1,8-Diaminooctane reacts with sebacic acid or other long-chain dicarboxylic acids to generate specialty polyamides, such as Nylon-8,8. Strict monomer purity supports polymerization stability, influencing molecular weight distribution and mechanical strength. Formulation targets precise diamine-to-diacid stoichiometry, with ongoing QC monitoring for thermal and mechanical requirements in applications including automotive components and electrical insulators. Consistent feedstock quality ensures batch-to-batch reproducibility, vital for enforcing downstream extrusion and molding tolerances.

    Industry compliance standards

    • ISO 9001:2015 Quality Management System for plastics
    • UL 94 Flammability Standard for Polymeric Materials
    • RoHS Directive 2011/65/EU (for electronics-related plastics)
    • REACH Regulation (EC) No 1907/2006 substance registration

    Typical usage ratio

    • 100 mol % relative to dicarboxylic acid co-monomer (1:1 molar)
    • Minor excess (up to 1.5%) sometimes added to shift equilibrium based on acid value titration results

    Downstream process integration

    • Charged in polymerization reactors during initial batch feed
    • Purified to <0.1% water and <100 ppm heavy metals pre-polymerization
    • Integrated with continuous monitoring of monomer conversion
    • Follows strict temperature/time regimen for high-molecular weight polymer formation

    Final product types

    • High-performance Nylon-8,8 resin pellets
    • Automotive under-the-hood parts
    • Electrical cable insulators
    • Blow-molded engineering housings

    2. Specialty Polyurethane Systems

    Polyurethane manufacturers select 1,8-Diaminooctane as an effective chain extender for producing flexible foams and high-elongation elastomers. The diamine structure modifies backbone flexibility, controlling phase separation and mechanical response. Processing requires precise introduction post prepolymer completion; undiluted or diluted with glycol depending on targeted elasticity. Application-specific grades must undergo full trace analysis to eliminate residual amines or solvents, supporting downstream product safety for furniture, footwear, and certain medical device components.

    Industry compliance standards

    • ISO 14001:2015 for Environmental Management Systems in foam manufacturing
    • REACH Annex XVII restricted substances—aromatic diamine exclusion
    • EN 71-3 for toy foam components (extractable amines)
    • FDA 21 CFR 177.1680 (for materials with food contact requirements in USA)

    Typical usage ratio

    • 3%–8% by weight relative to polyol/polyisocyanate combined mass, based on chain length flexibility needed
    • Adjusted using mechanical test feedback and DSC/TGA results

    Downstream process integration

    • Injected or metered in-line after prepolymer stage, prior to molding or casting
    • Mixes under nitrogen or dry air to prevent CO2 foaming side reactions
    • Downstream degassing and vacuum venting before curing
    • Traceable batch and lot number logging for QA/QC

    Final product types

    • High-resilience flexible foams for seating
    • Medical support cushions
    • Industrial vibration dampening pads
    • Elastomeric shoe soles

    3. Epoxy Curing Agent Formulations

    As an aliphatic diamine hardener, 1,8-Diaminooctane finds use in high-flexibility, low-yellowing epoxy curing systems. Its linear eight-carbon backbone imparts flexibility and chemical resistance, especially in flooring, metal coatings, and composites needing extended working times. Formulators optimize addition order and blend ratio with epoxide equivalents for controlled gelation, while full documentation on residual solvent and secondary amine content meets regulatory requirements in flooring or anhydride blend systems. Comprehensive raw material certification supports system consistency and end-user compliance.

    Industry compliance standards

    • ASTM C881/C881M Standard for epoxy adhesives
    • EN 1504-2: Surface protection systems for concrete
    • VOC restrictions per EU 2004/42/EC and SCAQMD Rule 1113 (for coatings)
    • ISO 12944-6:2018 for corrosion protection

    Typical usage ratio

    • Amine-epoxy ratio of 0.8:1 to 1.05:1 equivalent weight basis
    • Optimized by viscosity, pot life measurement, and ambient cure requirements specific to the application

    Downstream process integration

    • Blended into epoxy resin immediately prior to use, typically at project site or in dedicated mixing lines
    • Controlled temperature mixing (20–35°C) for uniform dispersion
    • Degassing or vacuum mixing for air-release critical applications
    • Package labeling with GHS/CLP-compliant safety details as per local regulations

    Final product types

    • Anti-corrosive industrial floor coats
    • Low-yellowing epoxy adhesives
    • Chemical-resistant tank linings
    • Prepreg composite laminates

    4. Organic Synthesis Intermediate for Pharmaceutical Manufacturing

    Pharmaceutical manufacturers use 1,8-Diaminooctane as a protected or free-base intermediate in production of active pharmaceutical ingredients (APIs) and high-purity excipients. Its long-chain structure supports linker, spacer, or salt-forming reactions, frequently within cGMP-compliant, multi-step pathways. QC programs include full chiral impurity, heavy metal, and residual solvent profiling. Manufacturers implement traceability from lot receipt through to API or excipient registration dossier, supporting regulatory requirements for worldwide distribution.

    Industry compliance standards

    • ICH Q7: Good Manufacturing Practice for Active Pharmaceutical Ingredients
    • USP-NF and Ph. Eur. monographs for excipients or API intermediates
    • 21 CFR Parts 210/211 FDA cGMP
    • EMA guidelines for impurity analysis

    Typical usage ratio

    • Variable: 1–2 equivalents as a linker or coupling partner, 0.5–1.2 equivalents in salt formation
    • Adjusted during route optimization based on yield and process safety studies

    Downstream process integration

    • Charged during nucleophilic substitution or amidation steps
    • Protected as the tert-butyloxycarbonyl (Boc) or fluorenylmethyloxycarbonyl (Fmoc) derivative if needed
    • Integrated with controlled temperature and solvent conditions according to reaction profile
    • Batch records maintained for regulatory audit

    Final product types

    • API intermediates
    • Specialty pharmaceutical linkers
    • Salt-form pharmaceutical actives
    • Polyamine stabilizers for biotech processes

    5. Corrosion Inhibitor Additives for Water Treatment

    In industrial water treatment, 1,8-Diaminooctane functions as a corrosion inhibitor component by chelating metal ions and forming adsorptive films on ferrous surfaces within piping, cooling towers, and boilers. Our experienced QA/QC teams monitor for aminic purity and ionic contaminant levels to assure environmental discharge compliance and product performance. Use parameters depend on system pH, water composition, and operational stress, with ongoing titration and field testing required by most plant operators to maintain long-term protection.

    Industry compliance standards

    • ANSI/AWWA B510-12: Standard for corrosion control chemicals
    • U.S. EPA TSCA Inventory listing for water additive raw materials
    • EU Biocidal Products Regulation (BPR) No 528/2012 compliance where required
    • National Sanitation Foundation (NSF) 60/61 for potable water system additives

    Typical usage ratio

    • 25–150 ppm by volume depending on system scaling, water hardness, and pH
    • Usage adjusted according to corrosion rate data and periodic field monitoring

    Downstream process integration

    • Metered into water circuits with automated dosing pumps
    • Staged addition with phosphates or polycarboxylates for synergistic corrosion protection
    • Continuous online monitoring of inhibitor residuals and iron content
    • Routine maintenance sampling and QC reporting

    Final product types

    • Closed-loop industrial water inhibitors
    • Recirculating cooling water additives
    • Steam boiler treatment packages
    • Concentrated multi-component water additive blends
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    Certification & Compliance
    More Introduction

    1,8-Diaminooctane: Direct Insights from an Experienced Chemical Producer

    What Sets 1,8-Diaminooctane Apart

    As a dedicated manufacturer who has been working with aliphatic diamines for years, we know 1,8-Diaminooctane stands out in both quality and versatility. Chemists recognize its utility because of its straight-chain structure – eight carbons give just the right balance of molecular flexibility and reactivity. From our vantage point inside the plant, each metric ton produced reflects years of process refinement, equipment upgrades, and in-depth understanding of diamine chemistry. The octamethylene chain, flanked by terminal amine groups, unlocks opportunities for customers aiming to synthesize specialty polymers or modify surfaces.

    Every batch of 1,8-Diaminooctane we make passes through rigorous in-house testing. We keep impurities such as omega-haloamines, residual solvents, and low-molecular byproducts below strict thresholds. This isn’t just a regulatory checkbox — our strict control means less downstream troubleshooting for formulators and manufacturers. When you open a drum or bag from us, what you get is a clear or slightly yellowish, solid, wax-like material that melts just above room temperature. That melting point matters; it gives our material a certain manageability compared to shorter diamines, yet won’t introduce processing headaches found with much longer analogs.

    Specification Details You Can Trust

    We routinely achieve purity levels above 99% according to gas chromatography. Moisture content stays below 0.30%, as measured by Karl Fischer analysis. Our 1,8-Diaminooctane has a melting point very close to 48–50°C, so it remains solid at ambient temperature, which many plastic and fiber plants appreciate for stable transportation and storage. The crystalline solid breaks apart with moderate force, which practical plant managers find facilitates handling in blending, extrusion, or compounding operations.

    The amine number sits predictably around 26.8 mg KOH/g; this reflects the accurate and consistent presence of both terminal amino groups. That’s not just a number on a spec sheet; it defines the material’s core reactivity in downstream curing, chain extension, or crosslinking applications. Packing the product in polyethylene-lined drums, we never compromise on protection from moisture and atmospheric CO2, both of which can cause carbamate formation and reduce the batch quality over time.

    Practical Uses of 1,8-Diaminooctane from the Eyes of a Producer

    Walking through plants that depend on our 1,8-Diaminooctane, we see the compound used in polyamide synthesis, especially for PA 8,8 fibers and resins. The chain length leads to lower water absorption and higher resistance to solvents compared to shorter-chain aliphatic diamines like hexamethylenediamine. That’s a decisive advantage if you’re looking for strong, resilient materials that retain dimensional stability even in humid conditions. We’ve seen customers in the specialty rubber sector use this diamine for making custom elastomers with finely tuned flexibility.

    The other role we frequently support involves epoxy curing. 1,8-Diaminooctane, as a hardener, delivers a unique balance of flexibility and toughness, leading to final materials that do not turn overly brittle. Coating manufacturers rely on this to produce anti-corrosive adhesives and composites able to endure dynamic stresses. Its relatively low vapor pressure at working temperatures means safer and more comfortable processor environments, a point not lost on our teams during bulk handling and batching.

    Specialty chemical firms have also told us about using our 1,8-Diaminooctane for building complex organic molecules, where its spacing between amine groups helps steer reaction selectivity. In surface-modification, the molecule becomes a key linker, grafting active groups onto minerals, pigments, or nanomaterials. Every time a researcher comes to us with a new application, we dig into their technical needs and production aims, because the way we treat this diamine at every stage — from hydrogenation to filtration, crystallization to packaging — tailors its end-use potential.

    The Differences That Matter: 1,8-Diaminooctane Versus Other Diamines

    Ask any industrial chemist, and they’ll tell you not all diamines behave the same way. Hexamethylenediamine, with six carbon atoms, brings higher melting points and a tendency to make more rigid polymers. The extra two carbons in 1,8-Diaminooctane lower the final materials’ glass transition temperature, lending flexibility without throwing durability out the window. From our side, adjusting pressure, hydrogen input, and choice of catalysts lets us reliably produce a cleaner, less odorous product compared to lower homologs.

    Take decamethylenediamine, where ten carbons often tip polymers toward softness, sometimes at the expense of toughness or solvent resistance. Our experience as large-scale producers reveals 1,8-Diaminooctane works right in the sweet spot. It can crosslink or extend chains without creating unmanageable processing viscosity or introducing unwanted plasticization.

    We also support ongoing academic collaborations, and in independent testing, our 1,8-Diaminooctane shows more predictable amine-end reactivity than branched analogs. Its linear structure means fewer steric effects and side reactions, which improves yield and simplifies purification — another factor that plays into cost savings down the line. Whether poured into a reaction vessel or used as a laboratory reagent, the substance shows reliable behavior batch after batch, a feature our process engineers take pride in sustaining.

    Bottle-to-Factory: Handling Insights Only Producers Know

    Handling 1,8-Diaminooctane isn’t just about drums and pallets. Our teams work directly with logistics providers to ensure the cargo never faces temperature extremes that might freeze or overheat the solid. We designed our containers so users don’t struggle with lumping or residue — an often-overlooked, time-consuming problem if not addressed from a manufacturing standpoint. Years of operational feedback have shaped every improvement in our filling lines and packaging room.

    Leaning on detailed records from hundreds of annual shipments, our storage guidance reflects reality. Kept dry, at ambient temperatures, the material keeps for 12 months without perceptible change in melting point or amine number. If a facility wants to use bulk feed, we offer custom super-sacks or direct-to-hopper solutions, compatible with both large and small installations. Because we run the reactors ourselves, we know the subtle differences in lot color, crystal texture, or even faint ammonia-like odors that signal a manufacturing deviation. That vigilance means you never inherit another party’s quality problem.

    Regulatory and Safety Experience Built into Every Batch

    Producing 1,8-Diaminooctane at industrial scale means navigating workplace safety, environmental stewardship, and regulatory compliance every day. Our operators wear full PPE throughout manufacturing, keeping workspaces clean and spill-free. Every drum ships with accurate classification and up-to-date documentation, reflecting ongoing changes in REACH and GHS labeling. We run closed-system purification lines to minimize fugitive emissions, addressing both worker protection and local environmental requirements.

    Years ago, we invested in automation for raw material dosing and temperature control, helping prevent off-spec material or runaway reactions. Our in-house laboratories review each batch before release, focusing not just on headline numbers but on real-world processability and safety. Clients benefit because they can count on consistency and traceability — crucial for companies facing tight industry certifications or customer audits. We see increasing demand for transparent, low-residue products, which has pushed us to cut residual hydrazine and formaldehyde content to the lowest reliable range for this chemistry.

    Supporting Research, Innovation, and Customization

    Our customers don’t always come from large plants. Small innovators and university labs have reached out for assistance using 1,8-Diaminooctane in pilot-scale syntheses, biomedical coatings, or even smart textiles. Our technical support team, staffed with chemists who have run the actual plant lines, fields requests for smaller packaging, advice on handling right-to-the-bench, and recommendations on compatible solvents or co-monomers. We don’t just hand off a product; we offer insight, because our decades spent with diamines translate into practical advice no distributor or catalog can match.

    Some partners work on projects that push existing uses. Recent years have seen our material tested in carbon-fiber surface activation, nanomaterial dispersion, and even biopolymer modification where food contact or low extractable content is mission-critical. We support this by voluntarily sending detailed spectral data and impurity profiles — not because a regulation forces our hand, but because we know these details can determine the success of a new technical approach.

    Environmental Responsibility from a Manufacturer’s Viewpoint

    Shifting global priorities mean a producer’s role stretches beyond reliable supply. Our facility periodically undergoes third-party audits, not just for ISO certification but also for waste minimization and effluent controls. With every ton of 1,8-Diaminooctane, we scrutinize raw material sourcing, process water recycling, and byproduct capture. As process chemists, we have reduced chlorinated waste by shifting to newer, more selective amination routes. Partnering with surrounding communities, we have invested in scrubbers, updated venting systems, and implemented detailed emergency response drills.

    We consult with downstream customers who require statements on heavy metal content or want reassurance on persistent organic pollutant absence. This isn’t about ticking boxes but about making sure users across industries — from textiles to automotive — feel confident about sourcing from a producer with long-term commitments. End-of-life product stewardship comes up more often now, and we provide help navigating recovery or incineration routes, as part of a cradle-to-cradle approach rather than a use-and-dispose mentality.

    Supply Chain Reliability: Insights from the Front Line

    Supplying 1,8-Diaminooctane worldwide means riding out market cycles, weather disruptions, and unpredictable swings in raw material prices. Our team actively works with partners up and down the value chain, sharing forecast data and inventory status to avoid shortfalls or bottlenecks. We run multiple reactors with staggered maintenance schedules, protecting against unexpected downtime. Finished goods storage prepares for seasonal demand spikes, notably with sectors that ramp requirements according to production calendars.

    Unlike a mere reseller, we optimize our distribution chain for both bulk and specialty orders, whether by sea, rail, or road. Our logistics staff train specifically for hazardous goods regulations across various regions, which keeps insurance rates reasonable and maintains on-time delivery. We welcome factory visits and quality audits, because transparency and open communication reinforce confidence for everyone involved.

    What We’ve Learned and How We Adapt

    Experience has taught us that feedback, whether about a batch color variance or a preference for a new packaging size, holds value. We regularly visit customer sites to observe product performance firsthand, speak with operators, and listen to end users. These insights drive tweaks in crystallizer operation, adjustments in drying curves, and improvements in packaging design. The decades spent operating the facility have instilled a culture of problem-solving and constant adaptation, which often shows up in subtle but important improvements.

    We have implemented barcoded tracing for every batch, tied directly to our synthesis and QA data, providing real-world traceability. Moving toward digital batch records and secure cloud backups further protects both producer and buyer from disputes or uncertainty years after the initial sale.

    1,8-Diaminooctane: A Commitment to Each Customer

    We approach every order of 1,8-Diaminooctane as more than just a shipment. Whether the need is for classic polyamide resin, a niche surface treatment, or development of a new polymer family, our role as a manufacturer is grounded in transparency, reliability, and expertise. Continuous investment in plant upgrades, process safety, and customer communication reflects the pride we take in each drum that leaves our site.

    Being a true producer of 1,8-Diaminooctane means more than meeting specifications. It means drawing from years on the manufacturing floor, understanding real-world application challenges, and staying alert to the evolving demands of every industry we serve. That hands-on experience is woven through everything we do, batch after batch.