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3-Methylpiperidine: what buyers are really asking for in 2025 If you source fine amines for pharma, agro, or advanced materials, you’ve probably bumped into 3-Methylpiperidine more than once. To be honest, the market has been a bit tight lately—energy costs, compliance upgrades, and, surprisingly, packaging logistics are shaping availability. Here’s the inside track, plus the hard specs buyers keep emailing me about. Quick product snapshot Name: 3-Methylpiperidine (aka 3-Pipecoline; Hexahydro-3-picoline) | CAS 626-56-2 | Formula C6H13N | MW 99.17 | UN No. 1993 (Flammable liquid, n.o.s.). Origin: Jinling Mansions No.106-1 East Yuhua Rd., Shijiazhuang, Hebei, China. Specification Typical value (≈, real-world use may vary) Test method Assay (GC) ≥ 99.0% (typical 99.5%) GC, internal standard (in-house SOP) Water ≤ 0.20% (typical 0.08%) Karl Fischer, ASTM E203 Color ≤ 20 APHA ASTM D1209 Density (20°C) ≈ 0.83–0.85 g/cm³ ASTM D4052 Boiling range ≈ 118–123 °C Distillation, ASTM D1078 Where it’s used (and why it’s popular) Pharmaceuticals: intermediate/base in heterocycle synthesis; salt formation studies in CDMOs. Agrochemicals: building block for selective herbicide and insecticide intermediates. Coatings & adhesives: catalyst/accelerator in epoxy and polyurethane systems; nice balance of basicity and volatility. Oilfield & water treatment: precursor for corrosion inhibitor chemistries. Many customers say they pick 3-Methylpiperidine for its clean GC profile and “predictable base strength”—not my words, but I hear it a lot. And actually, fewer off-notes in cured coatings is a recurring benefit. High-level process flow (supplier-side) Materials: hydrogenation-grade feedstock (e.g., 3-picoline), hydrogen, catalyst. Methods: selective hydrogenation, neutralization, phase separation, fine distillation. QC: GC assay, KF water, APHA color, residue-on-evaporation; COA per batch. Compliance: ISO 9001 QMS; REACH support file on request; GHS labeling. Service life: around 24 months sealed, nitrogen-blanketed drums, cool and dry. Industries served: pharma intermediates, agro, coatings, electronics auxiliaries. Vendor comparison (what buyers compare, honestly) Vendor Assay Lead time Docs & compliance Packaging Sincere Chemicals ≥99.0% (typ. 99.5%) 7–15 days ex-works ISO 9001, REACH support, SDS/COA 25 kg drum, 180 kg drum, IBC General Trader A ≥98.0% 3–6 weeks Basic SDS; limited dossiers Mixed lots; re-branded Lab-Scale Supplier B ≥99.5% (small packs) Stock-dependent Analytical COA only 0.5–5 kg bottles Customization, testing, and real feedback Customization: low-water grade (≤0.05%), tighter color spec, inhibitor-free, nitrogen blanket, custom labels. Test data (example lot): GC 99.52%; water 0.08%; APHA 15; residual toluene < 200 ppm. Certifications: ISO 9001; environmental/occupational systems available on request; SDS aligned to GHS. Customer note: “Cure time in our epoxy primer dropped ~8%,” said a mid-size coatings maker—small but valuable. Mini case studies Agro plant (EU): switched to tighter moisture spec of 3-Methylpiperidine ; crystallization step stabilized, batch rework down ≈12% over a quarter. CDMO (US): requested low-residual solvents; vendor implemented additional polish distillation. Deviations went from “occasional” to “rare”—their words. Safety note: flammable; handle with proper ventilation, bonding/grounding, and compatible seals. Follow SDS and transport rules under UN 1993. Authoritative citations PubChem Compound Summary: 3-Methylpiperidine, CAS 626-56-2. ECHA (European Chemicals Agency) brief profile: 3-Methylpiperidine (substance info, classification & labeling). ASTM E203: Standard Test Method for Water by Karl Fischer Titration. ASTM D1209: Standard Test Method for Color of Clear Liquids (Platinum-Cobalt Scale).