4-FBA, or 4-Fluorobutyric Acid, is a versatile compound used primarily in chemical, biological, and pharmaceutical research. Its unique structure, which includes a fluorinated alkyl chain and a terminal carboxylic acid group, makes it an important precursor in the synthesis of fluorinated compounds, metabolic studies, and compound profiling.

Precursor in fluorinated compound synthesis: 4-FBA is commonly used to synthesize fluorinated analogs of bioactive molecules, helping researchers explore the effects of fluorine substitution on activity and stability.

Pharmaceutical research applications: It plays a role in the early-stage development of experimental compounds, especially in the creation of drug candidates where fluorine may enhance metabolic resistance.

Used in metabolic tracing studies: The fluorine atom in 4-FBA allows researchers to track metabolic transformations through NMR or mass spectrometry-based techniques.

Structure-activity relationship (SAR) modeling: Researchers use 4-FBA to study how fluorinated side chains affect the biological activity of various compounds.

Intermediate in custom compound development: Its reactive carboxylic acid group can be modified into esters, amides, and other derivatives for further application in research.

4-FBA is legal to purchase online for laboratory and research purposes in most jurisdictions, provided that it is not intended for human or animal consumption. At RC Plug, we operate strictly within legal and ethical boundaries by selling only to those who confirm its intended use is research-only.

No prescription required: We do not require a doctor’s note or government license for your order, as our products are intended strictly for non-human research.

Research-only disclaimer: All our 4-FBA products are clearly labeled for laboratory use only, with no claims made for therapeutic, nutritional, or recreational application.

Jurisdictional compliance: We advise researchers to verify that the compound is permitted in their specific region before ordering, as regulations vary by country.

Shipped with accurate documentation: Each package includes a product safety and identification label to ensure compliance with international shipping and customs requirements.

Low-risk compound classification: 4-FBA is not scheduled or controlled in most countries, making it easier to import or transport for research purposes.

At RC Plug, our 4-FBA is lab-tested to meet a purity standard of ≥99%. We prioritize high chemical integrity because research accuracy depends on the reproducibility and reliability of the materials used.

≥99% certified purity: Our 4-FBA meets or exceeds 99% purity as confirmed by third-party and in-house analytical techniques including NMR and HPLC.

Batch-level testing: Every production batch is analyzed individually to confirm purity, and results are recorded and archived for quality tracking.

Contaminant screening: We perform additional tests to ensure that no heavy metals, residual solvents, or unwanted by-products are present above trace levels.

Consistency in purity: Our internal quality control protocols maintain tight production tolerances, so you can expect uniform results across orders.

Ideal for sensitive research models: High-purity chemicals reduce the likelihood of false positives or confounding variables in pharmacological, toxicological, and synthetic chemistry studies.

To maintain its chemical stability and ensure maximum shelf life, 4-FBA should be stored under specific conditions that protect it from environmental degradation. Proper storage prevents contamination, hydrolysis, and changes in composition over time.

Temperature control (2–8°C): The compound should be refrigerated in a chemical-grade refrigerator to maintain its physical and chemical properties.

Shield from light and air: Store the bottle in a dark place or amber glass container to minimize exposure to UV radiation and oxygen, which can cause gradual degradation.

Seal tightly: Ensure that the container is tightly sealed after each use to prevent moisture or air from entering and reacting with the contents.

Avoid temperature fluctuations: Sudden changes in temperature, especially in humid environments, can lead to condensation inside the container and compromise chemical stability.

Label and date opened: For long-term storage, note the date of opening on the label and monitor any color or consistency changes over time.

Keep away from reactive substances: Do not store near oxidizers, strong acids, or alkalis, as reactive vapors could compromise the compound’s purity.

4-FBA typically presents as a clear to pale yellow liquid under standard laboratory conditions. Its physical appearance is consistent with that of other low-molecular-weight aliphatic carboxylic acids, making it easy to visually identify during handling.

Color: Fresh 4-FBA is usually colorless to a faint yellow, indicating its chemical freshness. Slight yellowing may occur with age but does not necessarily imply impurity.

Viscosity and texture: It is a low-viscosity liquid, similar in texture to light organic solvents, allowing for easy pipetting and transfer using standard lab tools.

Odor profile: The substance has a mild, acidic scent typical of short-chain carboxylic acids, which may intensify slightly upon opening due to volatilization.

Clarity: It should appear fully transparent when viewed in a clean container; any visible particulates or cloudiness may indicate contamination or degradation.

Behavior under heat: 4-FBA has a stable boiling point around 186°C and does not volatilize easily under room temperature, which contributes to safe storage and handling.

Yes, our high-purity 4-FBA is fully compatible with various chromatographic techniques including gas chromatography (GC), liquid chromatography (LC), and high-performance liquid chromatography (HPLC). Researchers use chromatography to analyze, isolate, and quantify chemical substances, and our product’s purity and consistency make it ideal for such applications.

Excellent chromatographic behavior: The compound’s consistent boiling point, low volatility, and defined retention time make it suitable for both GC and LC applications.

High purity minimizes interference: Because our 4-FBA is ≥99% pure, it exhibits minimal background noise or interference during detection, ensuring accurate analytical results.

Compatible with derivatization: For advanced GC-MS analysis, 4-FBA can be easily derivatized into methyl esters or other volatile forms for enhanced separation.

Stable under analytical conditions: The compound remains stable during high-temperature injections and solvent gradients, preserving its identity throughout the run.

Useful as a calibration or reference compound: Due to its clean spectrum and chemical simplicity, it is often used as a reference standard or retention marker in method development.

Absolutely. We provide a detailed Certificate of Analysis (COA) for every batch of 4-FBA we distribute. This document ensures full transparency by listing analytical data, test methods, and quality assurance results.

Comprehensive analytical data: Each COA includes test results for purity, molecular structure confirmation (NMR), retention time (HPLC), and mass verification (MS).

Batch-specific documentation: We do not use generic COAs; each certificate corresponds to the exact batch you receive.

Validation of compliance: The COA confirms the compound meets or exceeds all internal quality standards for research-grade chemicals.

Request availability: You can request the COA before purchase or automatically receive it with your order, depending on your preference.

Supports audit trails: Our COAs are formatted to support laboratory documentation, useful for regulatory reviews and research paper citations.

Trusted third-party validation: Some analytical data may be supported by external labs for independent confirmation.

We offer 4-FBA in multiple packaging sizes to accommodate different levels of research—from small-scale chemical assays to bulk compound development. All containers are tamper-evident and made of chemically resistant materials.

10ml bottle: Ideal for small-scale, short-term projects, pilot testing, or academic research labs requiring limited volume.

25ml bottle: Suitable for moderate applications such as multi-day synthesis experiments or cross-reactivity studies.

50ml bottle: Commonly chosen by university labs and chemical developers conducting repeated assays or replication trials.

100ml bottle: Designed for high-throughput research operations or long-term studies where large volumes are needed.

Custom volume requests: For labs or institutions with unique quantity requirements, we can arrange custom fills or multi-unit packaging on request.

All containers are amber-glass: To protect the product from light exposure and ensure long-term chemical stability.

Tamper-proof and leak-resistant: Our packaging meets the standards for international chemical shipping and laboratory handling.

We prioritize rapid and reliable delivery. Once your payment is confirmed, we process your order within 24 hours. Delivery times vary based on location and shipping method selected at checkout, but we strive to get your 4-FBA to you as quickly and securely as possible.

Domestic (overnight) delivery: Orders within eligible regions can be delivered overnight when express shipping is selected.

Standard domestic delivery: Non-expedited shipping typically arrives in 1–2 business days.

International express: Most international orders are delivered within 5–8 business days, depending on your country and customs clearance times.

Real-time tracking: Every order includes a tracking number, which is shared with you immediately after the order is shipped.

Weekend and holiday processing: Orders placed on weekends or holidays are processed on the next business day, minimizing delays.

Customs advisory: We provide shipping documentation that simplifies customs clearance and minimizes inspection delays where applicable.

4-FBA is not approved for ingestion or direct human contact and must be handled with proper safety measures. While it is not classified as acutely toxic, it may pose health risks if misused or improperly handled. Researchers must follow chemical handling protocols to avoid unnecessary exposure.

Harmful if ingested or inhaled: Exposure through swallowing or inhalation of vapors can result in irritation or more serious symptoms depending on dosage.

Skin and eye irritant: Direct contact may cause localized irritation, redness, or a burning sensation. Always wear protective gloves and goggles.

Not for human consumption: Our product is labeled “For Research Use Only” and is not intended for food, drug, cosmetic, or therapeutic applications.

Material Safety Data Sheet (MSDS): We provide an MSDS for every product upon request. It includes toxicological data, exposure limits, and first aid recommendations.

Low volatility reduces risk: 4-FBA has relatively low vapor pressure, meaning its vapors are less likely to accumulate in well-ventilated environments.

Fume hood handling recommended: Always conduct procedures involving this compound in a fume hood to avoid exposure to airborne particles or gases.

Avoid long-term contact: Even at low toxicity levels, prolonged or repeated exposure can lead to cumulative effects in laboratory settings.

4-FBA plays a useful role as a precursor or intermediate in the early stages of pharmaceutical research. While it is not an active pharmaceutical ingredient (API), its structure and reactivity allow it to be integrated into synthetic pathways that explore the effects of fluorinated side chains in drug development.

Foundation for fluorinated analogs: 4-FBA is often used to introduce a fluorinated butyl group into candidate molecules, altering pharmacokinetics and metabolic stability.

SAR exploration: Medicinal chemists use it to study structure-activity relationships, particularly how fluorine substitution influences biological interactions.

Lipophilicity modification: Fluorine increases molecular lipophilicity, helping drugs cross lipid membranes more efficiently. 4-FBA contributes to this process.

Blocking metabolically vulnerable sites: The fluorine atom in 4-FBA can replace hydrogen atoms to create more stable molecules less prone to metabolic breakdown.

Enzyme interaction research: It’s used to synthesize inhibitors or activators of specific enzymes for preclinical biological testing.

Building block for prodrug synthesis: In some experimental models, 4-FBA-derived fragments have been evaluated as components of targeted prodrugs.

Limited to preclinical and lab-scale use: It’s important to note that 4-FBA is not approved for use in finished pharmaceutical products and remains strictly a research-grade material.

Yes, all our 4-FBA products undergo rigorous testing for both organic and inorganic impurities. Our quality control protocols are designed to detect even trace amounts of contaminants, ensuring our customers receive only the highest standard of research-grade material.

HPLC impurity profiling: High-performance liquid chromatography is used to identify and quantify even minor chemical impurities within each batch.

NMR structural verification: We confirm the molecular structure and identify possible structural impurities through nuclear magnetic resonance analysis.

Mass spectrometry checks: Impurities are further identified by mass spectrometry, which provides high-resolution detection of unexpected molecular weights.

Residual solvent testing: We evaluate all batches for trace solvents that may remain from synthesis or purification using gas chromatography.

Heavy metal screening: Advanced analytical methods check for toxic metals like lead, mercury, cadmium, and arsenic, ensuring they remain below trace levels.

Batch-specific results: Each batch is tested individually, and results are documented in the Certificate of Analysis provided to customers.

Stability monitoring: In addition to immediate impurity checks, we monitor chemical stability over time to ensure the product remains consistent throughout its shelf life.

Yes, RC Plug offers competitive pricing and bulk discounts for larger quantities of 4-FBA. We support academic institutions, research organizations, and industrial labs with custom pricing models designed to reduce cost per unit while maintaining product quality and service standards.

Tiered pricing system: Discounts automatically apply at checkout when you order larger quantities—such as 50ml or 100ml.

Institutional pricing: Universities, government research facilities, and corporate R&D departments can request special rates through direct inquiry.

Wholesale fulfillment: For recurring or high-volume buyers, we offer wholesale supply agreements with negotiated terms and guaranteed availability.

Custom fulfillment: We can accommodate special packaging and volume requests tailored to bulk storage or multi-lab distribution.

Secure and insured shipping: Bulk orders are handled with added care, including reinforced packaging and optional shipping insurance.

Bulk COAs and documentation: All large orders come with batch-specific COAs and additional documentation upon request to support compliance and record-keeping.

Priority dispatch: Large orders are given processing priority to minimize downtime for active research labs.

Handling 4-FBA requires strict adherence to standard laboratory safety protocols. While not acutely hazardous, it is a chemical that can irritate the skin, eyes, and respiratory tract if mishandled. Proper safety equipment and practices are essential for safe laboratory use.

Wear appropriate PPE: Always use nitrile gloves, a lab coat, and chemical splash goggles when handling 4-FBA to prevent contact with skin or eyes.

Use in a fume hood: To avoid inhalation of vapors or aerosols, work in a well-ventilated area or certified fume hood.

Avoid ingestion and inhalation: Never eat, drink, or smoke in areas where the chemical is handled, and avoid breathing in vapors directly.

Keep away from incompatible materials: Do not store or mix with strong oxidizers, bases, or other reactive chemicals unless under controlled reaction conditions.

Label all containers clearly: Ensure that all secondary containers are labeled with chemical name, concentration, and hazard symbols for traceability.

Use appropriate disposal methods: Waste materials containing 4-FBA must be disposed of according to local environmental regulations and laboratory waste procedures.

Read the MSDS: Familiarize yourself with the product’s Material Safety Data Sheet before use. It contains vital information on spill response, first aid, and chemical handling.

No, while 4-FBA and butyric acid share a similar backbone structure, the two compounds differ significantly in chemical behavior, reactivity, and research application. The key difference lies in the substitution of a fluorine atom on the terminal carbon of the butyl chain in 4-FBA.

Fluorine substitution: 4-FBA contains a fluorine atom at the fourth carbon position, whereas butyric acid does not. This substitution alters electronic properties and reactivity.

Different chemical formulae: Butyric acid is C4H8O2, while 4-FBA is C4H7FO2—highlighting the presence of fluorine in the latter.

Altered acidity and polarity: The fluorine atom in 4-FBA increases its acidity and dipole moment, leading to different solubility and interaction characteristics.

Distinct odor profiles: Butyric acid has a strong, unpleasant odor, often described as rancid or putrid. 4-FBA has a milder, more acidic scent due to fluorine’s influence.

Variability in metabolic behavior: Fluorinated compounds like 4-FBA exhibit altered metabolic pathways compared to non-fluorinated analogs, making them useful in metabolic stability testing.

Application in drug design: 4-FBA’s fluorinated structure is more commonly used in pharmaceutical and synthetic organic chemistry, while butyric acid finds use in food science and fermentation studies.

Reactivity in synthesis: 4-FBA is more resistant to oxidative degradation, making it more suitable for complex synthetic reactions than butyric acid.

Mixing 4-FBA with other research chemicals is possible but must be approached with caution. Compatibility depends on the intended experimental goals, chemical reactivity, and safety considerations. Any mixture should only be prepared under strict laboratory controls with full understanding of the involved compounds.

Assess chemical compatibility: Before combining 4-FBA with any reagent or substrate, consult reactivity charts and reference literature to confirm no hazardous interactions will occur.

Conduct small-scale tests first: Begin with micro-scale pilot reactions to observe any unexpected behavior, such as gas release, color change, or heat generation.

Avoid strong oxidizers or bases: 4-FBA can be sensitive to aggressive conditions, particularly when mixed with oxidizing agents or strong alkalis, which may cause decomposition or violent reactions.

Record molar ratios and conditions: Accurate documentation of concentration, pH, temperature, and reaction times ensures reproducibility and safety.

Monitor for exothermic activity: Reactions involving fluorinated acids may release energy unexpectedly; use appropriate heat control measures.

Use a fume hood for all experiments: Mixing chemicals always carries some level of risk—conduct all operations with ventilation and personal protective equipment.

Consult chemical databases: Resources like Reaxys, PubChem, or institutional safety databases offer useful data on reaction outcomes and known hazards involving 4-FBA.

At RC Plug, we prioritize your privacy and security with every order. Our discreet shipping policy is designed to minimize attention during delivery while ensuring that the product arrives safely, undamaged, and without delay.

Neutral packaging exterior: All shipments are placed in plain, unmarked boxes or mailers with no logos, product names, or chemical references visible.

Tamper-evident internal seals: The product is securely packed inside a leak-proof amber glass container, sealed and cushioned to prevent damage during transit.

Discreet sender name: The return address and sender label do not reference RC Plug or any chemical terminology.

Secure, opaque wrapping: Inner contents are wrapped in light-blocking material to avoid accidental disclosure if opened by third parties.

Customs documentation on request: For international shipments, we include generic documentation or legal chemical identifiers when required by border control—never revealing sensitive product data.

Shipment confirmation and tracking: You will receive a tracking number via email as soon as your package is shipped, so you can monitor its journey with full control.

Optional signature-free delivery: Where available, we allow signature-free drop-offs to further protect your anonymity and convenience.

Your satisfaction and trust are our top priorities. In the rare event that your order is lost, delayed, or damaged in transit, we offer a straightforward replacement or refund policy that ensures you’re never left without a solution.

30-day refund or replacement guarantee: If your product doesn’t arrive or arrives in unusable condition, we’ll either resend it or issue a full refund—your choice.

Immediate customer support: Contact our team with your order number and a brief explanation of the issue, and we’ll resolve it promptly.

Tracking assistance: We monitor tracking numbers and dispatch records to locate lost packages and confirm delivery status.

Photo confirmation for damaged items: If applicable, we may ask for photos of damaged packaging to improve future shipping procedures.

No restocking fees: If you request a refund within the return window, we do not charge additional administrative or handling fees.

Flexible solutions for international customers: We understand customs issues can arise; in such cases, we offer alternative shipping options or product substitutions when needed.

Yes, we stand behind the quality of our products with a 100% satisfaction policy. If you are not satisfied with your purchase for any valid reason, you’re eligible for a full refund or replacement within 30 days of receiving your order.

No-hassle policy: We don’t require long justifications or paperwork—just let us know what went wrong, and we’ll make it right.

Refund via original payment method: All refunds are issued through the payment channel used at checkout, whether Bitcoin, Zelle, bank transfer, CashApp, or Western Union.

Option to receive a replacement: If you prefer, we can reship the same item at no additional cost instead of refunding.

Quick resolution times: Most refund or replacement requests are handled within 1–3 business days.

Support from real people: Our customer support team is responsive, transparent, and dedicated to resolving issues without delay or generic responses.

Applies to all products: The policy covers every chemical we sell, not just 4-FBA.

While we ship worldwide, the legal status of research chemicals—including 4-FBA—can vary significantly between countries. It is your responsibility to ensure compliance with your local laws before ordering, but we do offer guidance and assistance with cross-border shipments.

Not classified as a controlled substance: 4-FBA is generally not regulated under major international drug control treaties, making it more accessible for research use.

Country-specific restrictions may apply: Some nations classify fluorinated compounds or carboxylic acids under local chemical registries or customs restrictions.

We assist with customs-friendly documentation: Upon request, we can label shipments generically or include Material Safety Data Sheets to facilitate customs approval.

We monitor global trends: Our team stays informed about regulatory changes and updates our shipping policies accordingly.

Responsibility of the buyer: It is ultimately your duty to ensure that the import and handling of 4-FBA complies with your country’s research or chemical control laws.

Packages labeled “For Laboratory Use Only”: This helps prevent misinterpretation of the product’s purpose during inspection.

Refusal to ship to banned destinations: If a country explicitly prohibits import of the compound, we may block the order or request additional verification to protect both parties legally.