A research order for 1-pentene rarely fails because of the chemistry. It fails because of what happens between the supplier’s warehouse and the lab bench: a degraded sample from poor storage, a shipment held up at a hazmat checkpoint, or a purity claim that does not hold up under GC analysis when the material finally arrives.

1-Pentene is a volatile, flammable, low-boiling alpha olefin. That combination makes it more demanding to source than most C5+ specialty chemicals. Procurement teams who treat it like a routine reagent order tend to discover the difference the hard way, usually mid-project, when a degraded or contaminated batch forces a re-order and a delay.

This guide covers what determines 1-pentene’s stability, what packaging actually needs to look like, and what to require from a supplier before you place an order.

What Is 1-Pentene? (CAS 109-67-1) A Quick Refresher

1-Pentene is a five-carbon linear alpha olefin with molecular formula C5H10 and CAS number 109-67-1. It is a colorless, highly volatile liquid with a low boiling point and a terminal carbon-carbon double bond, which makes it reactive toward addition reactions, polymerization, and organic synthesis.

Property	Value	Why It Matters for Sourcing
Boiling Point	29.9–30°C	Volatilizes near room temperature; demands sealed, pressure-rated packaging
Flash Point	-18°C to -51°C (closed cup, source-dependent)	Highly flammable; UN 1108, Packing Group I
Vapor Pressure	~10.2 psi at 20°C	Container headspace pressure builds quickly in warm conditions
Molecular Weight	70.13 g/mol	Low MW contributes to high volatility
Stability	Stable when pure; incompatible with strong oxidizers	Oxidizer contact is a primary degradation and safety risk
Typical Research Purity	≥98–99% (GC)	Lower grades carry higher isomer and moisture content

→ View the Sarchem Labs 1-Pentene Product Page

Why Stability and Storage Are the First Things to Get Right

1-Pentene’s chemical stability is generally good when the material is pure and properly stored. The risks are almost entirely external oxidation, contamination, and pressure buildup from temperature swings during storage and transit.

Oxidation and Peroxide Formation

1-pentene, like many alkenes, forms peroxides when exposed to air and light, especially in partially filled containers with large headspace. Peroxides are shock-sensitive and can undergo violent decomposition, leading to purity issues as oxidation products contaminate the sample and interfere with downstream reactions.

Keep in nitrogen or argon headspace if possible.
Avoid oversized containers with excess headspace to reduce air exposure.
Store away from light and heat; avoid clear glass containers for long-term storage.
If the stock lasts longer than the supplier’s shelf life, check for peroxide before use.

Temperature Control and Vapor Pressure

Internal container pressure depends on storage temperature because 1-pentene has a boiling point near room temperature. Uncontrolled warehouses and summer loading docks increase vapor pressure and stress container seals.

Store below 25°C. Refrigerated storage (2–8°C) extends stability and reduces vapor pressure risks.
Warm-and-cool cycles stress packaging seals more than cool storage.
Check your supplier’s shipping terms. Before reaching you, 1-pentene is exposed if left on a non-climate-controlled truck for several days. you

Ordering 1-pentene from a supplier who ships standard ground freight without temperature control in summer is a common but underappreciated procurement failure. The product may arrive within specs, but high internal pressure and peroxide formation shorten its shelf life before you open the container.

Packaging Requirements for Research-Grade 1-Pentene

Packaging for 1-pentene must satisfy two requirements simultaneously: regulatory compliance for flammable liquid transport and chemical protection against the volatility and oxidation risks described above.

Container and Closure Specifications

A compound with this vapor pressure profile cannot be stored in standard glass bottles with non-rated closures.
Nitrogen blankets in packaging reduce oxidation from the moment the container is sealed.
Septum-sealed or crimp-top closures for research quantities allow syringe withdrawal without opening the container, limiting repeated air exposure.
The flammable liquid classification requires UN-rated shipping packaging for DOT and IATA compliance (UN 1108, Packing Group I)

Quantity Considerations for Research Buyers

Research-scale orders range from milliliters for analysis to liters for synthesis and catalyst screening. Packaging should match the use pattern. Smaller, more frequent containers reduce the risk of oxidation from repeatedly opening large containers.

Smaller sealed ampoules or septum-top bottles for intermittent use. Avoid repeated air exposure.
Active synthesis programs can use larger containers with proper inert-atmosphere transfer (cannula transfer, glovebox, Schlenk line).

→ Browse Sarchem Labs Full Chemical Catalog

What Determines Real Purity Beyond the Label Claim

A purity percentage on a spec sheet is the starting point, not the full picture. For research applications where reproducibility matters, the composition of that remaining 1–2% impurity fraction is often more important than the headline number.

Impurity Type	Typical Source	Impact on Research Use
2-Pentene and branched C5 isomers	Incomplete separation during production	Interferes with reactions sensitive to double-bond position
Moisture	Inadequate drying or container seal failure	Reacts with moisture-sensitive catalysts and reagents
Peroxides	Oxidative degradation during storage	Safety hazard; contaminates downstream reaction products
Residual solvents	Incomplete purification post-synthesis	Confounds analytical results, especially in trace-level work
Sulfur compounds	Feedstock contamination	Catalyst poison even at sub-ppm levels in sensitive systems

For reliable reaction results, catalyst testing, reaction rate studies, or polymer analysis, ask your supplier for the GC trace or impurity profile, not just the purity percentage. Reliable vendors comply.

Procurement Challenges When Buying 1-Pentene

The recurring problems procurement teams report when sourcing 1-pentene and similar reactive alpha olefins:

Challenge	Real Impact	What to Require
Inconsistent purity between lots	Reaction yields vary unexplainably; results are difficult to reproduce	Lot-specific COA with GC data for every shipment
Inadequate packaging for the compound’s volatility	Product degraded or under pressure on arrival	Confirm pressure-rated, inert-atmosphere packaging before ordering
Long international shipping times	Material exposed to temperature swings for weeks in transit	USA-based domestic stock with verified short transit times
No documentation for hazmat compliance	Shipment delays at carrier checkpoints; receiving facility compliance issues	DOT/IATA-compliant labeling and shipping documentation provided upfront
Minimum order quantities are too large for research use	Forced overstocking of a flammable, degrading compound	Supplier offering small research-scale quantities, not just bulk drums

What to Look for in a 1-Pentene Chemical Supplier

The minimum qualification standard for a supplier of research-grade 1-pentene:

Lot-specific Certificate of Analysis with GC purity data, not generic specs.
Recent GHS-compliant Safety Data Sheet reviewed within 3 years
Detailed storage and shipping conditions ask how the product is stored and shipped to you.
Fireproof liquid packaging and labeling per DOT/IATA.
Research-scale quantities beyond industrial bulk packaging
USA-based inventory helps avoid transport delays that increase the risk of instability in volatile, reactive compounds.
The technical team that can answer specification, handling, and storage questions beyond order processing

Why Researchers Choose Sarchem Labs for 1-Pentene Sourcing

Sarchem Labs supplies 1-pentene (CAS 109-67-1) from its USA-based inventory, with documentation and packaging tailored to the compound’s actual behavior, rather than a generic chemical fulfillment process.

Lot-specific COA with GC purity verification provided with every order
Due to the compound’s volatility and flammability, use sealed, pressure-appropriate containers with inert headspace.
Research-scale and bulk industrial quantities are available without overstocking.
USA domestic stock: shorter transit times reduce long-distance shipping, storage, and temperature risk.
GHS- and DOT-compliant SDS and hazmat shipping documentation upfront
Contact a chemistry-trained technical team before ordering for specification, handling, and storage questions.

Sarchem Labs has supported pharmaceutical, biotech, and industrial research clients, including CROs, pharmaceutical and biotech laboratories, and government laboratories, for over 42 years, with a product catalog spanning more than 3,600 specialty chemicals.

→ Request a Quote for 1-Pentene

→ Contact Sarchem Labs. Speak with a Chemical Specialist

→ View the 1-Pentene Product Listing

Conclusion

1-Pentene is not a difficult chemical to use; it is a chemical that punishes careless sourcing. Stability and purity are both directly tied to how it was packaged, stored, and shipped before it reached your lab. A supplier who treats it as a routine commodity order is the wrong supplier for a compound this volatile and reactive.

For research buyers, the right approach is straightforward: verify the lot-specific purity data, confirm the packaging and storage conditions match the compound’s actual chemistry, and choose a supplier who can answer technical questions before you place the order, not after a degraded shipment arrives.

Need Research-Grade 1-Pentene With Verified Purity and Proper Packaging? Request a Quote or Speak with a Sarchem Labs Chemical Specialist Today.

Request a Quote

Product Page

Frequently Asked Questions

Where can I buy high-purity 1-pentene for research?

Sarchem Labs provides lot-specific Certificates of Analysis and GC purity verification for research-grade 1-pentene (CAS 109-67-1) from its USA inventory. Large industrial and research orders are available. Contact Sarchem Labs or visit the product page for a quote.

How should 1-pentene be stored to maintain purity and stability?

To prevent oxidation and peroxide formation, 1-pentene should be stored in pressure-resistant containers in the fridge below 25°C, with nitrogen or argon gas above the liquid. Avoid prolonged light, heat, and air. Compared to properly sized, minimally exposed packaging, large, unused headspace containers degrade faster.

What purity grade should I request for research applications?

Research-grade 1-pentene should be at least 98-99% pure, checked by GC analysis, and should have limits on certain impurities, moisture, and peroxide levels. Instead of using the summary purity percentage, request the GC trace or a detailed impurity profile for sensitive applications such as catalyst work.

Is 1-pentene dangerous to store or ship?

1-Pentene is a flammable liquid (UN 1108, Packing Group I) with a low flash point and high vapor pressure. To avoid pressure buildup and spoilage, it must be stored away from heat sources and oxidizers, in DOT/IATA-compliant hazmat packaging, and at the correct temperature.

What is the shelf life of 1-pentene?

Storage conditions greatly affect shelf life. At low temperatures and in inert atmospheres, 1-pentene stays stable. Low storage temperatures, large container headspace, and air exposure accelerate peroxide formation and shorten shelf life. If your supplier’s shelf life and storage conditions are unknown, test older stock for peroxide before use.

What should I check before placing a bulk or research order for 1-pentene?

Confirm the supplier provides a lot-specific COA with GC purity data, a current GHS-compliant SDS, documented storage and shipping conditions, and DOT-compliant hazmat packaging. Please check the quantity options for your research; buyers should not be limited to industrial bulk minimums. US stocks reduce the volatile compound shipping-time and temperature risks.

Sourcing High-Purity 1-Pentene for Research: Stability, Packaging & Supply Considerations