N Chemical Supply: High-Purity N-Dimethyl-1,3-Propanediamine
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.
Post time: Oct . 20, 2025 16:20
