|
HS Code |
806447 |
| Name | 3-Pyrroline |
| Iupac Name | 3,4-dihydro-2H-pyrrole |
| Molecular Formula | C4H7N |
| Molar Mass | 69.11 g/mol |
| Cas Number | 504-29-0 |
| Appearance | Colorless to pale yellow liquid |
| Boiling Point | 88-89 °C |
| Density | 0.892 g/cm³ |
| Solubility In Water | Miscible |
| Smell | Amine-like odor |
As an accredited 3-Pyrroline factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Amber glass bottle, tightly sealed, 100 mL; labeled with "3-Pyrroline," concentration, hazard symbols, manufacturer, and handling instructions. |
| Shipping | 3-Pyrroline is shipped in sealed, chemical-resistant containers to prevent leakage and degradation. It should be transported under cool, dry conditions and away from strong oxidizers. Proper hazardous material labeling is required, and shipments must comply with local and international chemical transport regulations to ensure safety during transit. |
| Storage | 3-Pyrroline should be stored in a cool, dry, and well-ventilated area, away from sources of ignition and incompatible substances such as strong oxidizers. Keep the container tightly closed and protected from light and moisture. Use appropriate chemical-resistant containers and ensure clear labeling. Handle under a fume hood to avoid inhalation and store in compliance with local regulations for hazardous chemicals. |
Applications of 3-Pyrroline in Industrial ManufacturingWe supply 3-Pyrroline to a wide range of regulated industrial sectors as a key intermediate. Our direct manufacturing ensures traceable quality for process-scale customers. The following sections outline real industrial downstream applications, each with compliance context, established mixing ratios, integration points, and finished product classes supported by our facility’s output. 1. Pharmaceutical Intermediate for Antipsychotic SynthesisPharmaceutical manufacturers rely on 3-Pyrroline as a building block in the synthesis of several antipsychotic active pharmaceutical ingredients (APIs), where it enters key cyclization reactions to form the core structure of target compounds such as pyrrolidine-based APIs. Controlled batch processing with validated cleaning protocols prevents carryover, while source traceability supports regulatory audits. Storage under inert atmosphere preserves reactivity, and on-demand supply maintains continuous manufacturing flows. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
2. Agrochemical Intermediate for Pyrrolidine Herbicide SynthesisCrop protection manufacturers utilize 3-Pyrroline for its function in constructing pyrrolidine moieties in herbicide active ingredients. This compound participates in hydrogenation and follow-up acylation to form key functional groups. Rigorous process risk analysis ensures operator safety and environmental controls, while continuous monitoring of reaction parameters minimizes residual monomer content in final formulations. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
3. Aroma Chemical Synthesis for Fine FragrancesIn the aroma chemicals industry, 3-Pyrroline serves as a precursor for green and vegetal notes incorporated into luxury fragrances and flavors, particularly to mimic natural plant-like scents in formulations. Manufacturers apply rigorous allergen and purity screening to comply with food and fragrance safety requirements. Distillation under vacuum ensures isolation of odorant molecules, with batch documentation supporting global shipment to flavor and fragrance houses. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
4. Specialty Polymer Modifier in Functional Material Manufacturing3-Pyrroline is adopted by specialty polymer producers for introducing pyrrolidine cyclic structures as functional side chains, enhancing film flexibility and adhesion in advanced coatings and adhesives. Chemical engineers optimize dosing against target polymer property profiles, and product stewardship ensures documentation of residual monomer content for downstream certifications and compliance with consumer safety regulations. Industry compliance standards
Typical usage ratio
Downstream process integration
Final product types
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For decades, our team has understood the technical detail and hands-on practice required to create 3-Pyrroline that research labs and fine chemical companies can trust. While plenty of people buy from intermediaries, direct sourcing from an actual manufacturer removes uncertainty at the lot-to-lot level. Clients come to us for material that truly matches its label, accompanied by documentation straight from qualified chemists who know the batch from start to finish.
In our facility, 3-Pyrroline leaves the reactor in a tightly controlled atmosphere. Moisture and contaminant ingress is a real risk with this unstable amine, so our team invests attention into inert gas handling and quick distillation. Our manufacturing process produces a clear, colorless liquid with a well-defined, characteristic odor. Each lot holds a minimum purity of 98 percent, consistently verified by GC. Any batch falling below that mark is flagged immediately, and we refuse to ship it. If corrosive content or byproducts show up beyond a single tenth of a percent, our controls stop a release. These are standards set by repeated demand from process chemists depending on reproducibility.
Making 3-Pyrroline goes beyond textbook steps. We have found that temperature ramp-up in the cyclization stage is sensitive by the minute, not just by general instruction. Our operators log observations shift-by-shift, sharing how pressure differentials or line flushes impact the final product. The amine takes on trace colors quickly if atmosphere is breached. The probability of such an outcome rises outside of our controlled zones, and that is why we designed our plant without shortcuts, even when smaller-scale approaches might let things slide for a single run.
Product from our line ships with documentation direct from QC—never from a generic database. Main points from our most recent analyses:
You get a certificate signed by staff who know which solvent washes were used, how unloading was carried out, and what immediate post-reaction checks told us about that batch.
Our main clients direct this product toward synthesis of heterocycles that show up in crop protection, health science, and device materials. A significant portion goes into alkaloid research, where ring purity and the absence of over-reduced species matter. Some of our repeat buyers use it for cycloaddition—including synthesis of proline derivatives or functionalized N-substituted rings.
Industrial R&D teams come to us because their downstream transformations—oxidations, reductions, hydrogenations—turn out unpredictable when even half a percent of byproducts sneak in. Small differences in amine content are enough to stall entire routes, especially in pharmaceutical lead synthesis or chromatographic separations. Buying product not handled at the source exposes labs to variability that costs time and compounds.
Not all 3-Pyrroline comes from the same process. Plenty of commercial samples originate as byproduct streams—scraped out after runs targeting other nitrogen heterocycles. We run lines dedicated solely to pyrroline, using only fresh starting materials for every cycle.
Scale makes a difference too. Some smaller companies rely on glassware-batch techniques, which risk variable heat transfer and local hot spots. Our reactors operate under automated monitoring, so residence time and quench conditions do not swing unpredictably from shift-to-shift. Clients notice: the product holds without picking up color on storage or decomposition in sealed containers.
Amine odor with 3-Pyrroline is strong, but a burned or acrid note often signals breakdown. We have experimented with various stabilizers: trace copper inhibitors can help, but these add complexity. Our best batches result from careful stripping of residual acidic or oxidizable contaminants before the material even hits the barrel.
Some repacked or resold material picks up iron or other metals during transfer, which leaves a tint and can seed peroxides if left unchecked. Our zero-iron protocol matches what many regulatory bodies request but, in practice, prevention comes from dedicated, lined containers at every step—no steel drums accepted, no reactive valve assemblies left in line.
Clients often ask about storage. Keeping the product dry, inerted with nitrogen, and out of direct light preserves both appearance and reactivity. We guarantee no more than 0.2% water upon shipment—delivered direct from our site, not held in outside warehouses.
We have followed academic and industrial routes to pyrroline, and found that both offer lessons not hinted at in the published papers. The most trusted commercial route involves reducing 2-pyrrolidone through a controlled hydride or catalytic reduction step. The choice of reducing agent drives which minor impurities show up. We use a sodium amalgam method that brings maximum selectivity for the unsaturated ring, steering clear of over-reduction to pyrrolidine.
Other sources sometimes rely on partial hydrogenation. While faster, hydrogenation can linger and tip the balance toward fully reduced amines. We maintain an aggressive separation stage. This is not a place for compromise—process scale-up introduces side paths that small-flask chemistry can miss, and we know which profiles trouble high-purity customers.
Every single drum shipped from our facility comes with a batch record, not just a shipping label or reseller paperwork. Our clients care about origin, and many audit our site for proof of segregation and contamination control. They see our warehouse clean zones, our vapor scrubbing, and have met the actual operators who filled their drums.
If clients have storage or stability questions after receipt, we track by batch and timestamp, so we can reproduce storage tests and address the reality in real time. If a proline reaction fails, we have full logs to trace what happened with both the product and the technicians—a level of accountability not possible from third-party brokers.
Colleagues sometimes ask why they should not substitute similar compounds in some reactions. Pyrrolidine, the fully saturated version, often brings excessive reducing power and eliminates the unsaturation needed for many synthesis strategies. Our customers in asymmetric catalysis and organocatalysis know the difference well: the olefinic tone of 3-Pyrroline enables a different reactivity set, crucial in ring-conversion or conjugate addition steps.
Other N-heterocycles—like pyrrole or piperidine—fail to duplicate this effect. Each brings its own aromaticity or steric profile, leading to off-path products or sluggish kinetics. Straight-chain amines run into regioselectivity issues, clogging up clean separation and analysis. For those seeking chiral precursors or backbone cyclizations, 3-Pyrroline’s unique structure is irreplaceable, and this comes through in our repeat customer base.
The chemistry industry faces growing scrutiny on environmental stewardship, and we answer with two decades of incremental improvements. All waste streams from our pyrroline production run through closed-loop recovery. We scrub nitrogen and amine vapors before venting, and hold to occupational exposure limits that reflect true risk. We teach all staff real case studies—never theoretical examples—of spills and cleanups, because confidence in handling translates to product quality.
Across our operations, we minimize the use of strong acids and heavy metals. The entire reduction chain relies on careful stoichiometry—overshooting not only wastes raw materials but brings in hard-to-remove side products. Our environmental team reviews chemical choices and batch records piece by piece to cut waste, not just as a box-checking exercise, but because the site team does not want to live alongside persistent contamination.
Every delivery is boxed with packing that reduces vapor escape, not just to avoid contamination but to protect the transport chain and receiving labs. Any reported incident means a full trace and an updated best-practices brief for shippers and technicians alike.
Over the years, some research groups have given us back unopened bottles, reporting subtle differences in outcome. These kinds of field observations guide our own internal training—flagging even just a fraction of a percent difference in water content, for example, reminds us that small changes impact scale-up or analytical reproducibility. A post-doc who finds a yellow hue where none should exist gets respect—and the chance to speak directly to the operators who handled their order.
We believe no manufacturer gets it right 100 percent of the time by accident. Continuous feedback, batch failures, and success stories form a direct line to our process tweaks. Each cycle adjusts for what real buyers see, not just what theory claims.
Although 3-Pyrroline looks simple on paper, in practice, its handling presents constant challenges. Color and purity issues often begin right at the point of reduction, not just at final packaging. Heat load, vessel contamination, even line residue in pump systems—all affect final specs. Every site visit with a client has revealed something fresh about why their chemistry might drift after switching suppliers, and it’s never just about price.
Oxidation remains a persistent risk with unsaturated amines. Small leaks or inconsistent nitrogen blanketing create problems that only become visible after a few weeks of storage. Training shipping staff to spot sweating, seal cracks, even slight off-odors means broken supply chains are found before a single dose ends up in a reaction vessel.
To address these risks, our team has put together checklists that reflect practical advice, not just abstract logistics. We monitor warehouse humidity, check that seals flex instead of crack, and demand daily signatures on inspection forms that cover more than just visual cues. Operators get feedback in real time—and packs are signed off by the same individuals, proving responsibility and continuity.
The end-user for 3-Pyrroline is often a synthetic chemist trying to push new boundaries or standardize a mature process. Our clients work on aggressive timelines. They value more than just a theoretical assurance—they need to know who ran their batch, which solvents were used for washing, and what maintenance was performed on key pumps before their product was transferred.
Full traceability sits at the base of our operation, driven by practical failures and rework demands learned over years. Every complaint, even minor, goes into training modules. We share reports openly: no fear of reputational loss, but a tight focus on continuous provision of what research, pilot, and manufacturing teams truly expect.
As regulatory scrutiny rises globally and research standards tighten with every passing month, true manufacturing partnerships for compounds like 3-Pyrroline become more valuable. Generic brokers may pull from various sources, creating a paper trail not anchored in reality. By maintaining dedicated lines and a visible record of practices, we can adapt as chemistries change, as sustainability demands increase, and as end-users push the limits of target synthesis.
Direct engagement with users gives us early warning on shifts in demand, odd results, or requests for complementary products. We respond with transparency: test records, rechecked analysis, and—when needed—adjusted processes in real time. This partnership model, built on direct feedback and hands-on ownership, keeps our 3-Pyrroline relevant not just today, but for the evolving future of chemical manufacturing.
Our experience spans work in pilot plants, classroom training, on-the-floor troubleshooting, and daily batch review. 3-Pyrroline continues to challenge and teach us—with no shortcut for hands-on expertise and documented procedure.
If you are seeking a partner for consistent, top-quality 3-Pyrroline, or need specific insights on storage, reactivity, supply interruption, or compliance with trace residue standards, our team stands ready. We believe in building deep, practical relationships—understanding not just what goes in a catalog, but what makes or breaks performance in your unique workflow.