Ethyl 2-bromohexanoate:Exports & Compliance White Paper 2026

I. Executive Summary

Ethyl 2-bromohexanoate (CAS 615-96-3) is an alpha-bromocarboxylate ester of nominal formula C8H15BrO2 and molecular weight 223.11 g/mol, supplied as a colourless to pale yellow liquid with a density near 1.19 g/mL, boiling in the 200-210 °C region at atmospheric pressure. The bromine sits on the carbon adjacent to the carbonyl, making the molecule a good electrophile there and simultaneously a moisture-sensitive, acid-liberating liquid. It is an alkylating building block for industrial and research users, not an active substance or consumer product.

Its role is to install a functionalised hexanoate fragment onto nucleophiles: amines, thiols, phenoxides and carbanions give alpha-substituted esters carried forward in pharmaceutical, agrochemical and fine-chemical routes, and the motif is also the classical Reformatsky partner. Demand is project-driven and tied to route selection, so volumes are modest and the qualification burden falls on hazard documentation as much as assay.

This white paper is written for CDMO partners, process chemists and sourcing and compliance officers. It covers the alpha-bromination route class at route-class level with no procedural detail, the alkylating hazard with ICH M7-style banding, lachrymator and corrosivity behaviour, hydrolytic instability and hydrogen bromide liberation, moisture and thermal control, cold and dry inert logistics, brominated-waste destruction, the analytical specification that matters, and the ICH, REACH, CLP, TSCA and GHS framework.

II. Product Deep Dive: Molecular Mechanisms and Production Evolution

2.1 Physicochemical Properties and Mechanisms

Two properties define the molecule commercially: the activated carbon-bromine bond adjacent to the carbonyl, and the hydrolytic lability of that same bond. The first is why it is bought; the second is why it fails in storage and why specification and packaging deserve as much attention as synthesis.

• Alpha-Bromoester Electrophilicity and Alkylation Chemistry: The ester carbonyl withdraws electron density from the adjacent carbon, making the bromide a good leaving group in bimolecular substitution with nitrogen, sulfur, oxygen and carbon nucleophiles. That reactivity is what allows a single step to attach a hexanoate fragment carrying a carboxylate handle, which is why the reagent appears in routes to alpha-substituted esters, amino-acid derivatives and heterocyclic intermediates.
• Hydrolytic Instability and Hydrogen Bromide Liberation: Moisture attacks the same carbon, replacing bromide with hydroxide and releasing hydrogen bromide, so the material acidifies as it degrades and the acid then catalyses further breakdown. This is why acid value and water content move together in aged lots, why drums must be kept dry and tightly closed, and why corrosion-resistant packaging and handling are mandatory rather than precautionary.

2.2 Synthesis and Manufacturing Technologies

At route-class level the substance is made by alpha-bromination of a hexanoic acid derivative followed by, or preceded by, esterification, the classic Hell-Volhard-Zelinsky family of chemistry. Practically, the commercially significant variables are how completely the bromination is driven, how the hydrogen bromide and bromine residues are removed, and how the product is stabilised and packed.

• Bromination Control and By-Product Management: Incomplete bromination leaves the unbrominated ester, while over-bromination gives dibrominated species; both are difficult to separate from the product by simple distillation and both consume nucleophile in the customer's reaction. Conversion and selectivity are therefore managed through reagent stoichiometry, temperature control and rigorous quenching, and the residual bromine and hydrogen bromide must be removed rather than neutralised in place.
• Purification, Stabilisation and Bromide Control: Distillation under reduced pressure is the standard purification step, chosen to limit thermal exposure because the molecule degrades and darkens when held hot. Stabilisation then depends on excluding moisture, controlling headspace and limiting storage temperature, with free bromide and acid value monitored as the leading indicators of stability rather than assay alone.

2.3 Core Application Matrix

• N-, O- and S-Alkylation in API Intermediate Routes: The reagent alkylates amines, phenoxides and thiols to give alpha-substituted hexanoate esters that are hydrolysed or further elaborated downstream. In pharmaceutical routes the value lies in introducing a lipophilic side chain with a carboxylate handle in a single step, and buyers specify closely because residual alkylating agent becomes a genotoxic-impurity question in the filing.
• Reformatsky-Type Carbon-Carbon Bond Formation: As a classical alpha-bromoester partner, it participates in zinc-mediated addition to carbonyl compounds to give beta-hydroxy esters, a transformation valued for its functional-group tolerance and for avoiding strongly basic conditions. Route designers weigh this against alternative enolate chemistry on cost, waste and selectivity grounds.
• Agrochemical, Fragrance and Fine-Chemical Building Block: The same alkylation chemistry serves agrochemical and fragrance intermediates and specialty ester manufacture, where the branched-chain ester motif contributes to odour profile, lipophilicity or formulation behaviour. In these applications the constraint is usually cost and consistent assay rather than regulatory documentation, although occupational handling rules apply regardless of end use.

III. Global Market Supply-Demand Landscape and Export Trends

3.1 Demand Drivers and Market Shifts

Demand tracks route selection rather than consumption cycles and is concentrated in a small number of qualified campaigns. Two shifts are observable. First, buyers move away from alkyl halide alkylations where catalytic alternatives exist, driven by genotoxic-impurity control costs rather than reagent price. Second, containment and documentation requirements push small-volume production toward CDMOs able to band and document hazardous alkylators.

3.2 Capacity Distribution and Export Flows

Capacity sits where bromination and fine-chemical distillation overlap and where bromine or hydrogen bromide is available. Chinese producers in the Shandong, Jiangsu and Zhejiang corridors supply catalogue and custom-synthesis volumes, often integrated to bromination reagents. Indian CDMOs around Hyderabad, Bengaluru and Gujarat run contained custom campaigns with strong analytical support. European producers in Germany, Switzerland and Italy focus on documented custom synthesis and toll campaigns, while North America concentrates research-scale supply and hazard banding expertise.

3.3 Market Bifurcation and Pricing Dynamics

Raw material is only part of the price; the dominant components are contained handling, vacuum purification, stabilisation and packing, and brominated-waste disposal. Research-use-only material is priced as a fine chemical, whereas campaign material with validated methods, impurity qualification and genealogy carries a premium. Buyers who specify the wrong tier discover the difference at filing stage, where a research-grade lot cannot be retro-documented.

IV. In-depth Analysis of Global Compliance and Regulatory Barriers

Compliance for this substance is hazard-led rather than volume-led. REACH, CLP, TSCA and GHS obligations apply to the substance in its own right, but the decisive requirements come from its behaviour as an alkylating agent: genotoxic-impurity control in the customer's product, occupational exposure banding in the plant, and controlled distribution with end-use declaration.

4.1 European Market: REACH, CLP, and Sector-Specific Directives

• REACH, CLP and Corrosivity Classification: REACH registration is required at the applicable tonnage, and CLP classification typically addresses skin corrosion or irritation and serious eye damage, reflecting lachrymator behaviour and hydrogen bromide liberation. Because classifications differ between data sets, buyers should verify the supplier's classification matches the one they apply before receipt.
• ICH Q7, Q11, Q3C and Q3D for Campaign Supply: In a GMP chain, ICH Q7 governs the quality system from the point of introduction and ICH Q11 governs starting-material justification. Residual solvents follow ICH Q3C and elemental impurities ICH Q3D, with attention to metals from catalysts and equipment. A supplier unable to support that assessment cannot serve a filed route.

4.2 North American Market: TSCA, EPA, and FDA Regulations

• TSCA Inventory and GHS Hazard Communication: The substance is listed on the TSCA inventory, and suppliers must maintain accurate safety data sheets and labels under the GHS-aligned Hazard Communication Standard. Given the lachrymator and corrosive properties, hazard communication must be explicit about handling under local exhaust and about the hydrogen bromide hazard that develops if the material contacts moisture.
• FDA Expectations and RUO Versus GMP Campaign Framing: Research-use-only material is not intended for clinical manufacture, while GMP-campaign material must be produced under a quality system supporting the applicant's filing, including its genotoxic-impurity strategy. Suppliers should require an end-use declaration and apply know-your-customer screening, since an alkylating agent attracts scrutiny over intended use.

4.3 The Critical Hurdle: Quality Control and Safety Limits

V. Green Trade Barriers and ESG in Manufacturing

Environmental performance is governed by bromine: both the reagent and its waste stream carry bromide that must be destroyed or recovered rather than discharged. Buyers with Scope 3 and effluent commitments increasingly ask how a supplier treats brominated waste before awarding a campaign, and this question now sits alongside price in tender evaluation.

5.1 Carbon Footprint and Circular Economy

The principal burdens are vacuum distillation energy, cooling to hold the product cold, and brominated-waste treatment by incineration with acid gas scrubbing or bromide recovery. Scope 3 is dominated by brominating reagents and solvents. For European customers, ISO 14001 certification and documented waste treatment are baseline expectations, and plant energy data supports reporting and the cost argument under the EU Emissions Trading System.

5.2 Sustainable Sourcing and Traceability

Traceability covers the bromination route family, the solvent and quenching history that sets the ICH Q3C residual-solvent profile, and the documented fate of brominated waste through licensed treatment. Buyers should also require a change-control commitment, because switching brominating reagent or solvent can shift the impurity profile without changing the CAS number, and because that shift propagates into the customer's impurity qualification.

VI. Supply Chain Resilience and Export Logistics

The material is a corrosive, moisture-sensitive lachrymator shipped in drums or smaller containers rather than in bulk, and the dominant risks are hydrogen bromide generation from moisture ingress and thermal degradation. Packaging and transit specification therefore matter more than freight economics, and buyers should confirm corrosion-compatible closures, inert headspace and cold-chain arrangements explicitly.

6.1 Packaging Standards and Moisture/Contamination Control

• Dry, Cool, Corrosion-Resistant and Inert Packaging: Standard packing is sealed, corrosion-resistant lined steel or fluoropolymer-lined containers under nitrogen, shipped cool and dry with secondary containment. Closures and gaskets must resist hydrogen bromide, and containers should be sub-packed to the size a campaign consumes so headspace is not repeatedly breached.
• Stability Monitoring and Goods-In Testing: Shelf life is governed by moisture and temperature rather than time, so the retest interval should come from stability data with acid value and free bromide as indicators. Goods-in testing should cover GC assay, acid value, Karl Fischer water, free bromide, related substances including the unbrominated ester, and appearance, since darkening and rising acidity precede assay loss.

6.2 Dangerous Goods Identification and Transit Protocols

Classification follows measured corrosivity, and corrosive organic liquids of this type are commonly assigned to Class 8 entries, moving under ADR, IMDG and IATA provisions in UN-specification packaging. Shipments should travel cool and dry, segregated from moisture sources and incompatible bases. Import documentation should state intended use, since research-use-only and GMP-campaign consignments are handled differently.

VII. Enterprise Global Expansion Strategy Guide

The commercial logic for suppliers and buyers alike is to compete on hazard competence and documentation depth rather than on nominal reagent price, because containment, waste and qualification dominate total cost of ownership.

1. Lead with the Hazard Banding and Impurity Package: Derive a health-based exposure limit, translate it into an occupational exposure band with defined containment class and cleaning limits, and document the ICH M7-style reasoning that supports the customer's genotoxic-impurity control strategy. Pair that with validated GC assay, acid value, water, free bromide and related-substance limits. This package converts a quotation into a qualification.
2. Engineer Moisture Exclusion and Brominated Waste: Treat hydrolytic stability as a design variable: dry and inert the whole transfer chain, pack in hydrogen-bromide-resistant containers, and keep the product cold. Invest in licensed brominated-waste treatment with documented destruction or bromide recovery, and quote waste handling explicitly, since it is a line item buyers increasingly evaluate.
3. Separate RUO and GMP Channels and Screen End Use: Run distinct documentation tracks for research-use-only supply and for ICH Q7 and Q11 aligned campaigns, quoting the applicable tier at enquiry stage. Apply know-your-customer screening and written end-use declarations, and pre-agree change-control notification periods so a reagent or solvent change cannot silently invalidate a customer filing.

VIII. Conclusion

Ethyl 2-bromohexanoate is a mature alkylating building block whose position is defended by the single-step efficiency it offers rather than by cost. It installs a hexanoate fragment cleanly, works in Reformatsky-type bond formation, and remains pragmatic when catalytic alternatives are uneconomic. The pressure is structural: every route using it inherits genotoxic-impurity and occupational exposure obligations, which increasingly decide whether the reagent is used at all.

For buyers, specify assay basis, acid value, water, free bromide and related substances, require a derived health-based exposure limit with matching containment limits, and declare research-use-only versus GMP-campaign needs at enquiry stage. For suppliers, defensible margin comes from moisture and temperature engineering, licensed brominated-waste treatment, hazard banding competence and clean separation of documentation channels. Those that deliver this remain suppliers of choice where a single alkylation step is still the most economical route.

IX. Industry Resource Connection and Supplier Ecosystem

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This white paper is exclusively compiled by the Guidechem Intelligence Team based on global customs data, regulatory databases, and industry research. Guidechem is a leading global B2B chemical platform, dedicated to connecting global buyers with verified, high-quality manufacturers.

Guidechem Global Ethyl 2-bromohexanoate Supplier Ecosystem List

Relying on Guidechem's extensive global database, we have mapped the core participants in the current global Ethyl 2-bromohexanoate supply chain:

• China: Integrated Bromination and Fine-Chemical Base: Chinese producers in the Shandong, Jiangsu and Zhejiang fine-chemical corridors supply catalogue and custom-synthesis volumes, often integrated to brominating reagents and to vacuum-distillation capacity. This corridor sets the price floor for research-grade material and increasingly competes on specification depth, packing quality and waste documentation for campaign work.
• India: Contained Custom-Synthesis CDMO Capacity: Indian CDMOs around Hyderabad, Bengaluru and Gujarat combine contained alkylator handling with strong process development, analytical method validation and impurity qualification. Their strength is taking hazardous chemistry from laboratory scale to a robust, banded plant campaign, which makes them the natural partner for scale-up rather than for catalogue supply.
• Europe and North America: High-Specification and Hazard-Competence Hub: European producers in Germany, Switzerland and Italy focus on high-specification custom synthesis and documented toll campaigns, competing on specification depth, ISO 9001 and ISO 14001 systems and regulatory support. North America concentrates research-scale supply, occupational banding and hazard-banding expertise, and the GMP documentation that governs filed routes, setting the qualification bar against which imported material is assessed.