Chemical Identity and Properties

2-Chloro-4-(trifluoromethyl)benzaldehyde (SKU: C195179) is an aromatic aldehyde bearing two strong electron-withdrawing substituents: a chloro group at the ortho position (C-2) and a trifluoromethyl group at the para position (C-4) relative to the aldehyde functionality. Its molecular formula is C₈H₄ClF₃O and its molecular weight is approximately 208.56 g/mol.

The combined inductive and resonance effects of the –Cl and –CF₃ groups render the aromatic ring highly electron-deficient, activating the aldehyde toward nucleophilic addition and making it a versatile electrophilic building block. The trifluoromethyl group also imparts enhanced metabolic stability and lipophilicity to derivative molecules, properties that are highly valued in medicinal chemistry lead optimization.

The compound is typically a colorless to pale yellow liquid or low-melting solid at ambient temperature. Exact physical constants (boiling point, melting point, density, refractive index) should be confirmed against the current Certificate of Analysis (CoA) supplied with each lot.

Safe Handling and Storage Protocols

Personal Protective Equipment (PPE): Always wear appropriate chemical-resistant gloves (e.g., nitrile), safety goggles or a face shield, and a laboratory coat when handling 2-Chloro-4-(trifluoromethyl)benzaldehyde. Work in a fume hood to minimize inhalation exposure to vapors.

Skin and Eye Contact: In the event of skin contact, remove contaminated clothing and wash the affected area thoroughly with soap and water for at least 15 minutes. For eye contact, irrigate immediately with copious amounts of water for at least 15 minutes and seek medical attention. Refer to the Safety Data Sheet (SDS) for complete first-aid measures.

Storage Conditions: Store in a tightly sealed container in a cool, dry, and well-ventilated area, away from sources of heat, ignition, and direct sunlight. Keep away from strong oxidizers, strong bases, and reducing agents. Maintain storage temperatures as specified on the product label and CoA.

Waste Disposal: Dispose of waste material in accordance with all applicable local, regional, and national regulations. Do not pour down drains. Consult the SDS for appropriate waste disposal guidance.

Note: Always consult the current SDS for this product before use. The SDS contains comprehensive hazard, handling, and emergency response information.

Applications in Synthesis and Research

The unique electronic profile of 2-Chloro-4-(trifluoromethyl)benzaldehyde makes it a valuable intermediate in several key areas of chemical research:

• Pharmaceutical Intermediates: The compound serves as an electrophilic aryl aldehyde building block for the construction of drug candidates. The electron-withdrawing groups facilitate condensation reactions, reductive aminations, and Knoevenagel condensations to yield scaffolds relevant to CNS, oncology, and anti-infective programs.
• Agrochemical Synthesis: Fluorinated and chlorinated aromatic aldehydes are established precursors in the synthesis of modern herbicides, fungicides, and insecticides, where the trifluoromethyl group enhances bioactivity and environmental stability profiles.
• Heterocyclic Chemistry: The aldehyde group readily participates in multicomponent reactions (e.g., Biginelli, Hantzsch, Doebner) and cyclocondensation reactions to afford fluorinated benzimidazoles, oxazoles, thiazolines, and related heterocycles.
• Schiff Base and Imine Formation: Reaction with primary amines yields Schiff bases that serve as ligands in coordination chemistry or as further synthetic intermediates.
• Materials Science: Fluorinated aromatic building blocks contribute to the preparation of functional organic materials with tailored electronic and optical properties.

Researchers are encouraged to validate reaction conditions, including solvent compatibility and reagent stoichiometry, in small-scale pilot experiments before scale-up.

Quality, Purity, and Specification Verification

Aladdin Scientific supplies 2-Chloro-4-(trifluoromethyl)benzaldehyde (SKU: C195179) with lot-specific quality documentation. Researchers and procurement teams should follow these best practices to ensure material suitability:

• Certificate of Analysis (CoA): Review the lot-specific CoA prior to use. The CoA details purity (typically determined by GC or HPLC), appearance, and other specification parameters. CoA documents are available on request or via the Aladdin Scientific website.
• Purity Confirmation: For sensitive applications (e.g., pharmaceutical synthesis, catalysis studies), consider independent purity verification by NMR (¹H, ¹³C, ¹⁹F) and GC-MS or HPLC analysis before committing to large-scale reactions.
• Identity Verification: The ¹⁹F NMR spectrum provides a sensitive and definitive probe for the CF₃ group. IR spectroscopy confirms the aldehyde C=O stretch (typically ~1690–1710 cm^-1 for aromatic aldehydes).
• Lot-to-Lot Consistency: If reproducibility across experiments is critical, procure sufficient material from a single lot or perform bridging studies when switching lots.
• Supplier Communication: Contact Aladdin Scientific technical support for custom purity grades, bulk quantities, or specific analytical data requirements.

Regulatory and Compliance Considerations

When working with 2-Chloro-4-(trifluoromethyl)benzaldehyde in a regulated laboratory or industrial environment, the following compliance considerations apply:

• GHS Classification: Consult the current SDS for the GHS hazard classification, signal word, hazard statements, and precautionary statements applicable to this compound. Ensure proper GHS labeling is maintained on all secondary containers.
• Transportation: Shipping classification and UN number should be confirmed with the current SDS and applicable transportation regulations (e.g., IATA, IMDG, DOT) before shipment.
• Import and Export Controls: Verify that procurement or export of this chemical complies with applicable national and international regulations in your jurisdiction.
• Laboratory Risk Assessment: Institutions should conduct a chemical-specific risk assessment before introducing this compound into a laboratory. Document control measures including engineering controls, administrative controls, and PPE selection.
• Record Keeping: Maintain accurate inventory records in accordance with institutional and regulatory requirements.

This guideline is intended to support — not replace — institutional safety programs. Always follow your institution's chemical hygiene plan and the guidance of your Environmental Health and Safety (EHS) office.