Carboxylic Acids & Carboxyl Fine Chemicals
Welcome to OUHE Technology’s catalog of carboxylic acids and carboxyl fine chemicals. We supply high-purity aliphatic carboxylic acids, substituted benzoic acids, and dicarboxylic acids essential for esterification, amide couplings, and acyl halide conversions. Use our advanced search bar to filter by CAS number or product name to secure your target intermediates.
Intermolecular Hydrogen-Bonded Dimers and Pungent Odor Containment
The carboxyl group (-COOH) forms exceptionally strong intermolecular hydrogen-bonded dimers, resulting in high melting points and structural stability. However, low molecular weight carboxylic acids are volatile liquids with highly pungent, offensive odors. At OUHE Technology, we address this by utilizing odor-barrier, air-tight packaging under dry nitrogen, preventing both vapor leakage and hygroscopic degradation of these acidic reagents.
Essential Synthetic Handles: From Amidation to Acyl Halide Conversions
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Substituted Benzoic Acids: Key aromatic building blocks optimized for Fischer esterifications and peptide amide couplings using reagents like EDC or DCC.
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Aliphatic & Dicarboxylic Acids: Highly pure precursors designed as polymer monomers, pH regulators, and building blocks for heterocyclic ring cyclizations.
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Acyl Chloride Precursors: Intermediates optimized for reaction with SOCl2 or oxalyl chloride to synthesize highly reactive acyl halide intermediates.
Controlling Acid-Catalyzed Side Reactions and Chromatographic Purity
Because carboxylic acids are acidic and can catalyze unwanted side reactions (such as ester or acetal hydrolysis) if trace water is present, rigorous quality control is essential. We utilize high-resolution HPLC or GC-FID to accurately measure active acid content and detect organic impurities. Complete structural verification is provided via NMR and MS spectroscopy through our academic partnerships.
Frequently Asked Questions
A: Low molecular weight carboxylic acids are highly pungent and hygroscopic. We package these volatile liquid acids in heavy-duty, double-sealed amber glass bottles or lined steel drums, utilizing specialized odor-barrier secondary containment.
A: Dicarboxylic acids have high melting points and low volatility. We analyze their purity using high-resolution HPLC or capillary GC (after silylation derivatization). We also perform complete 1H-NMR and 13C-NMR spectroscopy for structural confirmation.
A3: Yes. Our high-purity carboxylic acid intermediates (typically ≥98% or ≥99%) are dry and highly reactive toward chlorinating agents like thionyl chloride (SOCl2) or oxalyl chloride to yield acyl halides.