3,4,5-Trifluorobromobenzene 1-Bromo-3,4,5-trifluorobenzene · CAS 138526-69-9

What is 3,4,5-Trifluorobromobenzene?

3,4,5-Trifluorobromobenzene, formally 1-bromo-3,4,5-trifluorobenzene, is a benzene ring carrying three fluorine atoms and one bromine, formula C₆H₂BrF₃. At room temperature it is a colourless to pale liquid, boiling in the range of 140 °C at atmospheric pressure, with a flash point around 45 °C.

Its value as a building block comes from the bromine, which is a reliable handle for metal-catalysed cross-coupling (Suzuki, Negishi) and Grignard chemistry, letting synthetic chemists install the fully substituted 3,4,5-trifluorophenyl group onto a target molecule in a single, well-understood step. The three fluorines bring the metabolic stability, electronic tuning and lipophilicity benefits that make polyfluorinated aromatics a common design feature in modern drug and agrochemical candidates.

Commercially, it is produced by selective bromination of 1,2,3-trifluorobenzene, or via diazotisation/bromination routes from a trifluoroaniline precursor, giving a high-purity aryl bromide suitable for use directly in metal-catalysed coupling reactions.

It ships as a Class 3 flammable liquid rather than under the more severe toxic-goods classifications common to many nitroaromatic and chloroaromatic intermediates — a comparatively mild hazard profile for a specialty fluorochemical, though standard flammable-liquid precautions still apply.

Why 3,4,5-Trifluorobromobenzene specifically

• A reliable cross-coupling handle. The aryl bromide reacts cleanly in Suzuki, Negishi and related metal-catalysed couplings, letting chemists build complex molecules around the trifluorophenyl fragment.
• Grignard and organometallic chemistry. The bromide also forms the corresponding aryl Grignard or organolithium reagent for further carbon-carbon bond formation.
• The specific substitution pattern drug design needs. The 3,4,5-trifluorophenyl group appears in several pharmaceutical building-block routes where that exact fluorine pattern is required.
• Broader materials-science utility. Also used in liquid-crystal and specialty-polymer synthesis, where its electronic and steric profile is valued independently of pharma applications.

How 3,4,5-Trifluorobromobenzene is Manufactured

3,4,5-Trifluorobromobenzene is made on purpose through a dedicated fluorination and bromination sequence, so supply tracks installed fluorochemical capacity rather than a generic aromatics feedstock stream.

• Synthesis of 1,2,3-trifluorobenzene. A multi-step fluorination sequence (commonly via diazotisation/fluorination chemistry on a trifluoroaniline or related precursor) builds the trifluorinated ring.
• Selective bromination. The trifluorobenzene is brominated under controlled conditions to introduce the bromine at the position symmetric to the three fluorines.
• Purification. The crude product is purified by distillation to the target purity, typically 98% or better by GC.
• Quality release. Isomer purity, water content and refractive index are confirmed against specification before the batch is released.
• Finishing and packing. The purified liquid is packed under standard flammable-liquid handling conditions.

Typical Commercial Specification

Figures below are representative of commercial-grade 3,4,5-trifluorobromobenzene. Tell us your downstream route and the grade you need, and we will advise on the specification to order against.

Physical & Chemical Properties

Behaviour in the process

3,4,5-Trifluorobromobenzene's reactivity pattern is what synthetic chemists are buying:

• Cross-coupling reactivity. The carbon-bromine bond undergoes oxidative addition readily with palladium and nickel catalysts, the basis of Suzuki, Negishi and related coupling reactions.
• Grignard and organolithium formation. The bromide reacts with magnesium or is lithiated to give the corresponding organometallic reagent, a route to further carbon-carbon bond formation.
• Electron-poor ring. The three fluorines make the ring electron-poor, which affects the rate and selectivity of certain reactions compared with a simple aryl bromide.
• Combustible liquid. Flash point around 45 °C means it behaves as a standard flammable liquid in storage and handling, requiring ignition-source control.

3,4,5-Trifluorobromobenzene and Related Fluorinated Building Blocks

3,4,5-Trifluorobromobenzene is one of several polyfluorinated aryl halide building blocks, and the choice between them depends on the substitution pattern and the halogen chemistry the target synthesis needs.

Stated plainly: the choice of fluorinated building block is dictated by the target molecule's exact substitution pattern — a route designed around the 3,4,5-trifluorophenyl fragment needs this specific isomer, and a different pattern requires a different starting material.

Industries We Supply 3,4,5-Trifluorobromobenzene To

The same fluorinated aryl bromide feeds a pharmaceutical intermediate plant, an agrochemical producer and a liquid-crystal materials manufacturer. What changes is the downstream coupling chemistry and the documentation each requires.

Where 3,4,5-Trifluorobromobenzene is Used

3,4,5-Trifluorobromobenzene is bought almost entirely as a synthesis building block. These are the downstream chemistries our customers use it for.

In pharmaceutical and agrochemical synthesis

The aryl bromide is coupled under palladium or nickel catalysis to attach the fully substituted trifluorophenyl ring to a growing molecule, or converted to a Grignard or organolithium reagent for addition chemistry. Isomer purity matters because a positional impurity couples to give an off-target regiochemistry, which complicates purification of the final active ingredient.

In materials and specialty-chemical synthesis

Outside pharma and agrochemicals, the same fluorinated aryl fragment contributes specific electronic and steric properties to liquid-crystal materials, specialty polymers and other fine-chemical products where polyfluorinated aromatics are valued independently of their use in drug design.

Quality Control & Testing

Every lot is released against a batch-specific Certificate of Analysis, with isomer purity and water content reported alongside purity because both affect downstream coupling yield.

• 3,4,5-Trifluorobromobenzene content — by gas chromatography, the primary grade measure.
• Isomeric bromofluorobenzenes — reported because positional isomer carry-over couples to the wrong regiochemistry.
• Water content — measured because moisture can interfere with Grignard and some coupling reactions.
• Refractive index and specific gravity — fast purity and identity checks.

Common Process Problems & Likely Causes

When this building block causes trouble, it is usually isomer carry-over or moisture. This table is the shortcut our technical desk works through before anyone opens a complaint file.

Packaging, Storage & Shipping

• Standard packing. HDPE or lined steel drums, typically 25 – 200 kg net, with larger bulk formats on contract supply.
• Moisture exclusion. Keep sealed and dry, particularly where the material will be used directly in Grignard or organolithium chemistry.
• Temperature control. Store at room temperature, away from direct sun and heat sources; flash point is about 45 °C.
• Material compatibility. Standard flammable-liquid storage practice; avoid contact with strong oxidisers.
• Shelf life. Stable in sealed, dry containers under normal storage conditions.
• Transport classification. UN 1993, flammable liquid, Class 3, Packing Group III. ADR, IMDG, IATA and DOT requirements apply to packing, labelling and routing.

Hazards & Safe Handling

3,4,5-Trifluorobromobenzene is classified as a flammable liquid. Its hazard profile is comparatively mild for a specialty fluorochemical, but standard flammable-liquid precautions and good laboratory and plant practice still apply.

• Flammability. Flash point around 45 °C; keep away from open flames and ignition sources, and ground equipment during bulk transfer.
• Skin and eye contact. Standard practice is chemical-resistant gloves and goggles; rinse thoroughly with water on contact.
• Inhalation. Use adequate ventilation when handling in open systems, particularly in laboratory-scale cross-coupling or Grignard work.
• PPE. Chemical-resistant gloves and safety goggles as a baseline for routine handling.
• Environment. Avoid uncontrolled release to water; follow local effluent and waste-disposal rules.

Regulatory & Compliance Notes

3,4,5-Trifluorobromobenzene is a registered specialty fluorochemical shipped as a Class 3 flammable liquid. Because obligations differ by territory and use, the notes below are orientation rather than legal advice — confirm your own position with your regulatory adviser.

• GHS classification. Typically classified as a flammable liquid; the SDS carries the full hazard statements for your grade.
• REACH and chemical inventories. Registered under EU REACH and listed on major chemical inventories.
• Dangerous goods transport. UN 1993, flammable liquid, Class 3, Packing Group III. ADR, IMDG, IATA and DOT requirements apply to packing, labelling and routing.
• HS code. Commonly declared under the halogenated hydrocarbon derivatives heading; confirm the exact tariff line with your customs broker for your jurisdiction.
• Quality agreements. Pharma and agrochemical producers commonly expect documented isomer purity and moisture limits and change control. Tell us what your agreement requires.

We Supply 3,4,5-Trifluorobromobenzene Worldwide

Chelora Chemicals is a supplier and export partner, not a single-plant trader. We ship 3,4,5-Trifluorobromobenzene from India and from partner sources to customers across Asia, Europe, the Middle East, Africa, and North and South America, handling the export documentation and freight so the material arrives ready to use.

• Incoterms. EXW, FOB, CIF, CFR and DAP quoted to suit your purchasing terms and freight arrangements.
• Ports. Regular shipments through Nhava Sheva (JNPT) and Mundra, with other ports arranged as routing allows.
• Documentation. Commercial invoice, packing list, certificate of origin, COA and SDS issued as a complete set.
• Flexible volumes. From drum trial quantities up to repeat bulk shipments on a supply contract.
• Supply continuity. Because we are independent of any one producer, a plant turnaround or a shipping disruption at one source does not have to become your stock-out.

Buying 3,4,5-Trifluorobromobenzene from Chelora

We are an independent sourcing and supply partner. For this product that means settling three things at enquiry: the purity and isomer tolerance your coupling chemistry needs, the packing format, and the quantity you are buying.

• Documentation on every lot. Batch-specific COA with purity, isomer content and water, plus the current SDS.
• Analysis before commitment. Representative analysis shared ahead of a commercial order so your lab can qualify the material.
• Quantities. Drum trial quantities through to larger bulk shipments on contract supply.
• Inspection. Independent third-party inspection available at loading when the contract requires it.
• Related fluorinated building blocks. Para Fluoro Aniline and other fluorinated intermediates alongside this product from one supplier.

How ordering works

• Send the enquiry. Purity, quantity, destination port and the Incoterm you buy on. If you have a spec sheet, attach it — it saves a round trip.
• We quote. Price, lead time, packing format and a sample COA, normally within one working day.
• Qualify the supply. For first orders or pharma-grade applications, we share the analysis so your technical team can sign off before you commit.
• Confirm the order. Proforma invoice issued; payment terms agreed against the volume and the relationship.
• Allocation and QC. Material allocated and released against a batch-specific COA, with an independent inspection where the contract calls for it.
• Ship and document. Packed, labelled and loaded with the full export document set, and tracked through to arrival.

Related Fluorinated Building Blocks

Buyers of 3,4,5-trifluorobromobenzene often source other fluorinated aniline and aryl halide building blocks alongside it. Consolidating them cuts freight cost and gives you a single point of contact for documentation.