The Bifunctional Oxetane “Linchpin” Building Block for Energetic Materials (BAMO), Advanced Polymers, and Pharmaceutical Scaffolds: 3,3-Bis(bromomethyl)oxetane (BBMO, CAS# 2402-83-7)

3,3-Bis(bromomethyl)oxetane (CAS# 2402-83-7), also known as BBMO, 3,3-bis(bromomethyl)oxetane, or 3,3-di(bromomethyl)oxetane, is a strained four-membered cyclic ether bearing two highly reactive bromomethyl arms at the C3 position. Its molecular formula is C₅H₈Br₂O and its molecular weight is 243.92 g/mol. The geminal substitution at C3 provides the “Thorpe-Ingold effect,” stabilizing the ring against premature hydrolysis while maintaining high reactivity toward Lewis acids and nucleophiles. This dual-functionality—the high ring strain of the oxetane core (approximately 107 kJ/mol) combined with two electrophilic bromomethyl groups—allows for divergent reactivity: cationic ring-opening polymerization (CROP) to form polyethers and nucleophilic substitution (azidation) to install azide groups, enabling the synthesis of energetic materials, crosslinked networks, and complex molecular architectures.

BBMO is typically a solid or semi-solid near room temperature, with a melting point of approximately 25°C and a boiling point of 125°C at 23 mmHg (vacuum distillation required). It is soluble in dichloromethane, THF, toluene, and chloroform, and is air- and moisture-sensitive, requiring storage under inert gas. The compound is supplied at ≥95% to ≥98% purity (GC). Under GHS, it is classified with the signal word “Warning” (H302: Harmful if swallowed) and requires standard laboratory safety precautions during handling.

3,3-Bis(bromomethyl)oxetane is a critical heterocyclic building block whose value derives from the unique combination of a strained oxetane ring and two electrophilic bromomethyl groups. This dual reactivity makes BBMO a “linchpin” motif in heterocyclic chemistry, serving as the definitive precursor to 3,3-Bis(azidomethyl)oxetane (BAMO)—the key energetic monomer for high-energy thermoplastic binders (CE-PBAMO) in propellants and combustible cartridge cases—as well as a versatile building block for UV-curable hyperbranched polymers, crosslinked networks, and pharmaceutical scaffolds. Based on its chemical characteristics and industrial significance, this article systematically analyzes the key properties, core application areas, global market structure, regulatory landscape, and future outlook of this strategically important bifunctional oxetane building block.

Key Properties and Reactivity Profile

3,3-Bis(bromomethyl)oxetane (CAS# 2402-83-7) is a geminally disubstituted oxetane whose value derives from the orthogonal reactivity of its strained ring and two bromomethyl arms.

Key physicochemical parameters include:

• Molecular Formula: C₅H₈Br₂O
• Molecular Weight: 243.92–243.93 g/mol
• CAS Number: 2402-83-7
• Synonyms: BBMO; 3,3-Di(bromomethyl)oxetane; Oxetane, 3,3-bis(bromomethyl)-; NSC-281665
• MDL Number: MFCD00269694
• Appearance: Solid or semi-solid (often appears as a supercooled liquid); melting point near room temperature
• Purity: ≥95% (GC); ≥97% (GC) and ≥98% available
• Melting Point: ~25°C (requires warm water bath for dispensing if stored cold)
• Boiling Point: 125°C at 23 mmHg; 249.4°C at 760 mmHg
• Density: 1.891 g/cm³; ~1.83 g/cm³
• LogP: 1.79–1.8 (predicted)
• Topological Polar Surface Area: 9.2 Ų
• Solubility: DCM, THF, toluene, chloroform
• Stability: Air- and moisture-sensitive; store under inert gas
• GHS Classification: Warning; H302 (Harmful if swallowed)
• SMILES: BrCC1(CBr)COC1
• InChIKey: QOPMHMFIIMJWET-UHFFFAOYSA-N

The compound’s reactivity is defined by its two orthogonal handles: the strained oxetane ring, whose oxygen is highly basic compared to acyclic ethers, making it susceptible to cationic initiation (CROP) to form polyethers; and the two bromomethyl groups, which serve as excellent electrophiles for nucleophilic substitution reactions (azidation, alkylation, etherification) and for installing functional handles in polymer and pharmaceutical synthesis. The geminal substitution provides the Thorpe-Ingold effect, which stabilizes the ring against premature hydrolysis while maintaining high reactivity toward Lewis acids.

Core Application Fields and Demand

Market demand for 3,3-bis(bromomethyl)oxetane (CAS# 2402-83-7) is concentrated in four primary sectors: energetic materials and propellant binders (approximately 40–45% of global consumption), advanced polymer and materials science (approximately 25–30%), pharmaceutical and medicinal chemistry (approximately 15–20%), and specialty chemical synthesis and surface modification (approximately 10–15%). Its unique combination of a strained oxetane ring and two electrophilic bromomethyl groups serves as the core driver of sustained demand growth.

In energetic materials and propellant binders, BBMO is the definitive precursor to BAMO (3,3-bis(azidomethyl)oxetane), a high-energy monomer used in propellants and combustible cartridge cases. The industrial synthesis involves nucleophilic substitution of the two bromomethyl groups with sodium azide to form BAMO, which is then polymerized to produce CE-PBAMO (a high-energy thermoplastic binder). CE-PBAMO is used as a high-energy thermoplastic binder in the manufacture of new-type combustible cartridge cases with the concept of 3R (recycle, reduce, reuse), demonstrating its strategic importance in advanced munitions and propulsion systems. The synthesis of BBMO itself from pentaerythritol via selective bromination followed by intramolecular Williamson ether synthesis (cyclization) has been optimized to achieve yields of 81% with purity of 97.2%, establishing a reliable industrial supply chain.

In advanced polymer and materials science, BBMO is a versatile building block for synthesizing specialty polymers with tailored properties. Cationic ring-opening polymerization (CROP) of BBMO yields Poly(3,3-bis(bromomethyl)oxetane) (PBBrMO), a precursor to energetic binders. The bromomethyl groups enable post-polymerization functionalization, making BBMO valuable for creating cross-linked networks that enhance the mechanical properties of materials used in coatings and adhesives. BBMO and 3,5-dihydroxybenzoic acid have been selected as starting materials to introduce oxetane groups into the periphery and interior of hyperbranched structures, enabling the synthesis of UV-curable macromers that contain oxetane on and around hyperbranched frameworks. These materials find applications in advanced coatings, adhesives, and surface modification where tailored thermal and electrical properties are essential.

In pharmaceutical and medicinal chemistry, BBMO is increasingly utilized as a bifunctional building block for developing new drug candidates. The strained oxetane ring is a privileged structural motif in medicinal chemistry, contributing to conformational rigidity and metabolic stability. The two bromomethyl groups can facilitate further chemical modifications, making it easier to tailor compounds for specific therapeutic targets. Four FDA-approved drugs contain oxetane rings—Orlistat, Paclitaxel, and two of its derivatives, Docetaxel and Cabazitaxel—and oxetane-containing building blocks are flourishing in medicinal chemistry and drug discovery. BBMO’s unique structure allows for the creation of complex molecular architectures with precise control over spatial arrangement, making it valuable for the development of novel therapeutic agents.

In specialty chemical synthesis and surface modification, BBMO is effective in modifying surfaces to improve adhesion and compatibility in various applications. It finds applications in creating advanced materials with specific thermal and electrical properties, which are essential in electronics and aerospace industries. BBMO is also used in the synthesis of tetrahydrofuran/thiolane derivatives, expanding its utility in heterocyclic chemistry.

Major Market Participants

The global supply system for 3,3-bis(bromomethyl)oxetane (CAS# 2402-83-7) features a pattern of “specialized fluorochemical and heterocyclic manufacturers, multinational research chemical distributors, and Chinese producers serving distinct market segments.” The global market report on 3,3-Bis-(bromomethyl)-oxetane (CAS 2402-83-7) provides comprehensive data on manufacturers, suppliers, prices, end-users, and downstream industries across Europe, Asia, North America, and other regions, with forecasts extending through 2029.

In the global research and high-purity segment, key international suppliers include Sigma-Aldrich (Merck), offering the compound under product code SYX00245 (AldrichCPR) with CAS 2402-83-7, MDL MFCD00269694, and molecular weight 243.92. AK Scientific (AKSci) offers the compound at 97% (GC) purity under product code 1717AB, with all products stocked and shipped from the SF Bay Area, California. Advanced ChemBlocks Inc. (AChemBlock) offers the compound from its Hayward, CA facility. ChemScene offers the compound at ≥97% purity under catalog number CS-0003922 with 10 g, 100 g, and other packaging options. BOC Sciences offers the compound as a useful research chemical for the preparation of tetrahydrofuran/thiolane derivatives, with process scale-up from lab to industrial scale. Aladdin Scientific offers the compound at ≥98% purity with triple ISO certification and COA/SDS available for every product. Tokyo Chemical Industry (TCI) supplies the compound for research applications. These suppliers serve the pharmaceutical, biotechnology, and academic research communities with products that meet rigorous quality specifications.

In the industrial and large-scale production segment, Chinese manufacturers have emerged as significant players in the global supply chain. XinChem is a reliable manufacturer and supplier of high-purity 3,3-bis(bromomethyl)oxetane from China, offering the compound with stringent quality standards for use in energetic materials, advanced polymer synthesis, and pharmaceutical scaffold development. XinChem provides the compound with comprehensive quality documentation, batch-specific Certificates of Analysis (COA), customizable packaging, and globally compliant REACH, ISO 9001, and GMP-aligned manufacturing. Chinese suppliers offer the compound at various purity grades (typically 95–99%) and packaging options—from grams to multi-kilogram quantities—serving both domestic and export markets. Production scale capabilities include up to 500 g and 1 kg quantities from suppliers such as Shanghai Yingyicheng Biotechnology, and 100 g to 1 kg quantities from industrial suppliers. The compound is available at prices ranging from approximately RMB 3,200 per gram for high-purity specialty grades to $9.90 for 5 g from Aladdin Scientific, and $250 for 1 g from ChemShuttle.

Regional Market Dynamics

The global 3,3-bis(bromomethyl)oxetane market exhibits distinct regional characteristics, with production concentrated in Asia-Pacific (particularly China) and consumption distributed across North America, Europe, and the Asia-Pacific region, aligned with the energetic materials, polymer, and pharmaceutical industries in these regions. The global market report covers supply and demand dynamics, manufacturers and distributors, prices, and end-users across Europe, Asia, North America, and other regions, with forecasts extending through 2029.

The Asia-Pacific region has emerged as a significant production hub for 3,3-bis(bromomethyl)oxetane, with China hosting numerous manufacturers and suppliers including XinChem. The region’s competitive advantages include lower production costs, established chemical infrastructure, and proximity to rapidly growing energetic materials and polymer industries. Chinese suppliers offer the compound at various purity grades (typically 95–99%) and packaging options—from grams to multi-kilogram quantities—serving both domestic and export markets. The growing demand for energetic materials in defense applications and advanced polymer research in China, Japan, South Korea, and India continues to drive regional consumption growth. Chinese manufacturers have optimized the synthesis of BBMO from pentaerythritol via selective bromination and base-mediated cyclization, achieving yields of 81% with purity of 97.2%, establishing a reliable industrial supply chain.

North America remains a key market for high-purity and research-grade 3,3-bis(bromomethyl)oxetane, driven by demand from the energetic materials industry, advanced polymer research, and pharmaceutical R&D. The United States hosts numerous defense research organizations, polymer companies, and pharmaceutical companies that require high-quality oxetane building blocks for propellant binder development and drug discovery. Sigma-Aldrich, AK Scientific, Advanced ChemBlocks, and BOC Sciences serve the North American market with extensive distribution networks. The region’s well-established regulatory framework, including EPA and DOT oversight of energetic materials, supports demand for high-grade research chemicals and intermediates.

Europe is characterized by stringent regulatory requirements, including REACH registration, and a strong focus on quality and safety in energetic materials and pharmaceutical research. European defense research organizations, polymer manufacturers, and pharmaceutical companies demand high-purity oxetane building blocks with comprehensive documentation. The region’s advanced materials science infrastructure and strict safety standards support steady demand for high-quality BBMO.

Japan represents a specialized market where 3,3-bis(bromomethyl)oxetane is supplied by Tokyo Chemical Industry (TCI) and other distributors for energetic materials research, polymer synthesis, and pharmaceutical applications.

Regulatory and Safety Considerations

As a halogenated oxetane intermediate with applications in energetic materials and pharmaceutical synthesis, 3,3-bis(bromomethyl)oxetane (CAS# 2402-83-7) is subject to regulatory oversight in major global economies. Compliance with relevant regulations is essential for market access and trade.

GHS classification and handling: 3,3-Bis(bromomethyl)oxetane is classified with the signal word “Warning”. Hazard statements include H302 (Harmful if swallowed). Precautionary statements include P264 (Wash skin thoroughly after handling), P270 (Do not eat, drink or smoke when using this product), P301+P312 (IF SWALLOWED: Call a POISON CENTER/doctor if you feel unwell), P330 (Rinse mouth), and P501 (Dispose of contents/container to an approved waste disposal plant). The compound is air- and moisture-sensitive and should be stored under inert gas (nitrogen or argon) at room temperature (or refrigerated at 2–8°C for long-term storage). Personal protective equipment including lab gloves, safety glasses, and a lab coat should be worn during handling, and operations should be conducted in a well-ventilated environment.

Transport information: 3,3-Bis(bromomethyl)oxetane is classified as a dangerous good for international transport. Proper packaging, labeling, and documentation are required for shipping in compliance with the International Maritime Dangerous Goods Code (IMDG Code) and other transport regulations. The compound is typically shipped at ambient temperature with appropriate moisture protection and inert atmosphere.

Regulatory compliance: In the European Union, the compound must comply with REACH registration requirements for import and use. Manufacturers and suppliers must provide comprehensive Safety Data Sheets (SDS) and maintain appropriate documentation. In the United States, 3,3-bis(bromomethyl)oxetane is intended for research and development use only and is not intended for therapeutic, food, cosmetic, or consumer applications unless explicitly stated otherwise. For energetic materials applications, manufacturers must comply with relevant EPA, DOT, and ATF regulations. For pharmaceutical intermediate applications, manufacturers must comply with relevant FDA regulations and quality standards.

Future Outlook

The market outlook for 3,3-bis(bromomethyl)oxetane is positive, supported by several key growth drivers across its major application segments. While the compound remains a relatively specialized bifunctional oxetane, its unique dual reactivity and essential role as the BAMO precursor and hyperbranched polymer building block position it for steady growth in the coming years. The global 3,3-Bis-(bromomethyl)-oxetane market is forecast to maintain steady growth through 2029, driven by sustained demand from energetic materials, advanced polymer, and pharmaceutical sectors.

Key growth drivers include:

1. Expansion of energetic materials and propellant binder applications: BBMO’s role as the definitive precursor to BAMO and CE-PBAMO—high-energy thermoplastic binders for combustible cartridge cases and advanced propulsion systems—drives demand from defense and aerospace sectors. The 3R (recycle, reduce, reuse) concept in munitions development supports sustained demand for high-performance energetic binders.
2. Growth in UV-curable hyperbranched polymers and crosslinked networks: The growing demand for advanced coatings, adhesives, and crosslinked networks with tailored mechanical and thermal properties drives consumption of BBMO as a key building block for hyperbranched macromers and specialty polymers. Its ability to introduce oxetane groups into the periphery and interior of hyperbranched structures enables the synthesis of UV-curable materials with unique performance characteristics.
3. Expansion of oxetane-containing pharmaceutical scaffolds: The growing recognition of the oxetane ring as a privileged structural motif in medicinal chemistry—with four FDA-approved drugs containing oxetane rings—drives demand for BBMO as a bifunctional building block for drug discovery. Its ability to facilitate further chemical modifications makes it valuable for tailoring compounds for specific therapeutic targets.
4. Growth in surface modification and adhesion applications: The compound’s effectiveness in modifying surfaces to improve adhesion and compatibility in various applications, including electronics and aerospace, supports steady demand from the specialty chemical sector.
5. Increasing focus on continuous flow synthesis: The development of continuous flow chemistry methods for the synthesis of 3,3-bis(bromomethyl)oxetane addresses the limitations of batch chemistry—including the formation of byproducts such as (3-(bromomethyl)oxetan-3-yl)methanol under high-temperature conditions—and enables more efficient, scalable production.

Challenges and considerations:

• Air and moisture sensitivity: BBMO requires storage under inert gas and protection from moisture, which may increase handling and logistics costs.
• Hazardous material classification: The compound’s classification as harmful if swallowed (H302) and its use in energetic materials applications require appropriate safety measures during handling and storage.
• Limited scale: As a specialized bifunctional oxetane, the market for BBMO is smaller than that of commodity chemicals.
• Competition from alternative oxetane building blocks: The market faces competition from other oxetane derivatives with different substitution patterns.
• Regulatory compliance: Increasingly stringent chemical and energetic materials regulations may require ongoing investment in quality systems and documentation.

To succeed in this evolving market landscape, suppliers must focus on product quality (particularly purity and batch-to-batch consistency), supply chain reliability, regulatory compliance, and responsive customer service. Companies that can offer high-purity products, flexible packaging options, and technical support for energetic materials, advanced polymer, and pharmaceutical applications will be well-positioned to capture growing demand.

Shanghai XinChem Co., Ltd. (XinChem)

As a world-leading supplier of organic chemicals and heterocyclic building blocks, Shanghai XinChem Co., Ltd. (XinChem) is dedicated to meeting the innovative needs of the energetic materials, advanced polymer, pharmaceutical, and fine chemical industries. Leveraging extensive experience and advanced manufacturing capabilities, XinChem provides high-quality 3,3-Bis(bromomethyl)oxetane (BBMO, CAS# 2402-83-7) to customers worldwide. As a trusted manufacturer and supplier based in China, XinChem combines competitive pricing, reliable supply, and exceptional service to establish itself as a preferred partner for defense research organizations, polymer manufacturers, pharmaceutical companies, and research institutions seeking this versatile bifunctional oxetane building block.

1. Technical Advantages

Advanced Synthesis and Purification Processes
XinChem utilizes state-of-the-art manufacturing facilities and rigorous quality control measures to ensure the purity, consistency, and safety of its 3,3-bis(bromomethyl)oxetane products. The production process incorporates established synthetic routes—including the selective bromination of pentaerythritol to pentaerythritol tribromohydrin followed by base-mediated intramolecular Williamson ether synthesis (cyclization) in ethanol with potassium hydroxide—enabling the delivery of products with purity ≥95% (GC), ≥97% (GC), and ≥98% (GC) to meet diverse application requirements. Strict process control ensures consistent product quality, minimal impurities, and batch-to-batch reproducibility, providing customers with reliable performance in energetic materials synthesis, advanced polymer development, and pharmaceutical scaffold construction.

Full-Chain Quality Control
The production process strictly adheres to international quality standards, with comprehensive quality control covering raw material sourcing, in-process monitoring, and finished product testing. Each batch is accompanied by a detailed Certificate of Analysis (COA) documenting physical and chemical properties, purity data (GC), melting point, density, and impurity profiles. XinChem offers batch-specific COA, customizable packaging, and globally compliant REACH, ISO 9001, and GMP-aligned manufacturing.

2. Product Advantages

High Purity and Consistent Quality
XinChem offers 3,3-bis(bromomethyl)oxetane with purity ≥95% (GC), ≥97% (GC), and ≥98% (GC) available, ensuring optimal performance in energetic materials synthesis, advanced polymer development, and pharmaceutical scaffold construction. The product’s high purity and consistent quality minimize the risk of unwanted side reactions and impurities, making it suitable for demanding applications in propellant binder synthesis, UV-curable hyperbranched polymer development, and drug discovery.

Comprehensive Specifications
Key specifications include:

• Molecular Formula: C₅H₈Br₂O
• Molecular Weight: 243.92–243.93 g/mol
• CAS Number: 2402-83-7
• Synonyms: BBMO; 3,3-Di(bromomethyl)oxetane; Oxetane, 3,3-bis(bromomethyl)-; NSC-281665
• MDL Number: MFCD00269694
• Appearance: Solid or semi-solid; melting point near room temperature
• Purity: ≥95% (GC) / ≥97% (GC) / ≥98% (GC) available
• Melting Point: ~25°C
• Boiling Point: 125°C at 23 mmHg
• Density: 1.891 g/cm³
• LogP: 1.79–1.8
• Solubility: DCM, THF, toluene, chloroform
• Storage: Inert gas (nitrogen or argon), 2–8°C for long-term storage, protect from moisture
• GHS Classification: Warning; H302

Flexible Packaging Solutions
XinChem provides a range of packaging options to accommodate diverse customer needs, from laboratory-scale quantities (1 g, 5 g, 10 g, 25 g) to industrial-scale packaging (100 g, 500 g, 1 kg) and bulk shipments. Customized packaging solutions are available upon request, ensuring safe handling, storage, and transportation with appropriate moisture protection and inert atmosphere.

3. Application Fields

As a versatile bifunctional oxetane building block, 3,3-Bis(bromomethyl)oxetane (CAS# 2402-83-7) exhibits wide application value across multiple industries:

Energetic Materials and Propellant Binders:

• Definitive precursor to BAMO (3,3-bis(azidomethyl)oxetane), a high-energy monomer for propellants
• Key intermediate for CE-PBAMO, a high-energy thermoplastic binder for combustible cartridge cases (3R concept: recycle, reduce, reuse)
• Precursor for Poly(3,3-bis(bromomethyl)oxetane) (PBBrMO) and Poly(3,3-bis(azidomethyl)oxetane) (PBAMO) energetic binders

Advanced Polymer and Materials Science:

• Building block for UV-curable hyperbranched macromers containing oxetane on and around hyperbranched frameworks
• Precursor for crosslinked networks with enhanced mechanical properties for coatings and adhesives
• Monomer for specialty polymers with tailored thermal and electrical properties for electronics and aerospace

Pharmaceutical and Medicinal Chemistry:

• Bifunctional building block for new drug candidates with oxetane-containing scaffolds
• Precursor for complex molecular architectures with precise control over spatial arrangement
• Intermediate for tetrahydrofuran/thiolane derivatives and other heterocyclic compounds

Specialty Chemical Synthesis and Surface Modification:

• Effective surface modifier for improving adhesion and compatibility in various applications
• Component in advanced materials with specific thermal and electrical properties
• Precursor for specialty oxetane derivatives and functional materials

4. Service Support

Technical Expertise and Customized Solutions
XinChem’s team of experienced chemists and application engineers provides full technical support throughout the customer journey—from product selection and specification development to application guidance and troubleshooting. Whether customers require optimization of azidation conditions for BAMO synthesis, guidance on cationic ring-opening polymerization (CROP) parameters, or assistance with regulatory documentation, XinChem’s technical experts are ready to help. Custom synthesis and contract manufacturing with flexible scaling from R&D to commercial quantities are available upon request.

Global Logistics and Reliable Supply
With established supply chains serving markets across Europe, North America, Asia-Pacific, and beyond, XinChem ensures timely delivery and consistent product availability. The company’s logistics team manages all aspects of international shipping, including compliance with dangerous goods transport regulations, customs clearance, and documentation, with appropriate moisture protection and inert atmosphere for product stability.

Regulatory Support
XinChem provides comprehensive documentation to support regulatory compliance, including Safety Data Sheets (SDS), Certificates of Analysis (COA), and other required certificates. The company stays current with evolving regulatory requirements in major markets, including REACH, TSCA, EPA, and other regional regulations, helping customers navigate the complexities of global trade.

5. Reasons to Choose XinChem

• Professionalism: Extensive experience and deep expertise in heterocyclic building block synthesis and supply.
• Quality: Rigorous quality control, high purity (≥95% to ≥98%), and adherence to international standards.
• Reliability: Stable supply, competitive pricing, and timely delivery.
• Flexibility: Customized solutions to meet diverse customer needs, including custom synthesis and packaging.
• Service: Responsive technical support and comprehensive documentation including batch-specific COA.

Contact us today to start your partnership with XinChem!

Website: www.xinchem.com

Email: sales1@xinchem.com

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