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N, N-DIMETHYL-1, 3-PROPANEDIAMINE market snapshot and hands-on spec guide If you formulate epoxy hardeners, personal‑care intermediates, or water‑treatment aids, you’ve probably wrestled with DMAPA before—better known as N, N-DIMETHYL-1, 3-PROPANEDIAMINE . To be honest, it’s one of those deceptively simple amines that can make or break downstream performance: trace water shifts cure profiles, color ruins a batch of surfactant intermediates, and impurity drift shows up months later in customer complaints. I’ve seen it happen. What’s moving the market Two currents stand out this year: personal‑care demand for amphoteric surfactants (cocamidopropyl betaine, etc.) and steady industrial use in epoxy curing agents and corrosion inhibitors. Supply out of North Asia has been fairly resilient; however, tightness in acrylonitrile (a key upstream) occasionally nudges lead times. Sustainability? Many buyers now ask for ISO 14001 and REACH-confirmed documentation as standard, which—surprisingly—has become a differentiator in tenders. Technical specifications (typical) Synonyms: 3‑Dimethylaminopropylamine (DMAPA), 3‑Aminopropyldimethylamine. CAS: 109‑55‑7. Molecular Formula: C5H14N2. Real‑world molecular weight ≈102.18 g/mol (verify COA; datasheets sometimes vary). Property Typical Value (≈) Notes Purity (GC) ≥ 99.0–99.5% Area‑% GC; real‑world use may vary Water (Karl Fischer) ≤ 0.20% ASTM E203 / ISO 760 Color (APHA) ASTM D1209 Boiling Point ≈ 134–136°C @ 101 kPa Literature range Density (20°C) ≈ 0.81–0.83 g/cm³ COA confirms lot‑specific Amine Value ≈ 560 mg KOH/g Potentiometric titration Flash Point (closed cup) ≈ 30–36°C GHS flammable liquid Shelf Life 12–24 months Sealed, nitrogen‑blanketed, cool storage How N, N-DIMETHYL-1, 3-PROPANEDIAMINE is made (high level) Materials: dimethylamine + acrylonitrile → DMAPN (nitrile intermediate) → hydrogenation to N, N-DIMETHYL-1, 3-PROPANEDIAMINE . Methods: fixed‑bed hydrogenation, followed by fractional distillation; water polishing; inhibitor control. QA testing: GC purity, KF water, APHA color, residual DMAPN/secondary amines by GC‑MS; amine value by titration. Standards & compliance: ISO 9001, ISO 14001 preferred; REACH/TSCA listing; SDS and GHS labeling as required. Applications and why buyers pick it Key uses: epoxy curing agent intermediates (amidoamines), amphoteric surfactants (e.g., CAPB routes), flocculants and paper chemicals, fuel/corrosion inhibitors, textile auxiliaries, and polyurethane chain extenders. Many customers say low APHA color and tight water control improve batch-to-batch reproducibility—especially in personal care where color drift is a deal‑breaker. Vendor comparison (field notes, indicative) Vendor Purity Certs Lead Time Customization Sincere Chemicals (Origin: Jinling Mansions No.106-1 East Yuhua Rd., Shijiazhuang, Hebei, China) ≈99.5% GC ISO 9001/14001, REACH support ≈2–4 weeks Color/APHA targets, water spec tightening Global Vendor A (EU) ≈99.0–99.5% REACH registered ≈3–5 weeks Packaging variants Global Vendor B (US) ≈99.0% TSCA listed ≈2–6 weeks Custom COA panels Customization and packaging For N, N-DIMETHYL-1, 3-PROPANEDIAMINE , buyers often request: APHA ≤ 20, KF ≤ 0.10%, inhibitor‑free or specific stabilizer, nitrogen blanket, and drum/IBC/iso‑tank options. In real plants, dialing water down from 0.20% to 0.05% can noticeably sharpen epoxy cure curves—small change, big payoff. Case snapshots Epoxy hardeners: a Southeast Asian blender cut gel‑time variability by ≈12% after switching to N, N-DIMETHYL-1, 3-PROPANEDIAMINE with tighter KF and lower color; complaint rate dropped quarter‑over‑quarter. Personal care: a shampoo line reduced off‑odor incidents by upgrading to APHA ≤ 20 lots and refreshing storage to ≤ 9 months. Testing, safety, and service life Routine tests: GC purity, KF water (ASTM E203), APHA (ASTM D1209), amine value by potentiometric titration. Ensure REACH/TSCA status, SDS compliance, and ideally supplier labs operating to ISO/IEC 17025. Store N, N-DIMETHYL-1, 3-PROPANEDIAMINE cool, dry, sealed; practical shelf life is 12–24 months. Always review the lot COA—data tells the story. Authoritative references PubChem Compound Summary: 3‑Dimethylaminopropylamine (CAS 109‑55‑7). ECHA Substance Information: 3‑Dimethylaminopropylamine (REACH data dossiers). ASTM D1209: Standard Test Method for Color of Clear Liquids (APHA). ASTM E203 / ISO 760: Water content by Karl Fischer titration. ISO 9001 / ISO 14001: Quality and Environmental Management Systems (certification frameworks). US EPA TSCA Inventory: Chemical Substance Listings.