Primary Amines & Amino Fine Chemicals
Welcome to OUHE Technology’s catalog of primary amines and amino fine chemicals. We supply high-purity aliphatic primary amines, substituted anilines, and amine salts essential for amide synthesis, Schiff base condensations, and diazonium couplings. Use our advanced search bar to filter by CAS number or product name to secure your target intermediates.
High Basicity and Control over Atmospheric Carbon Dioxide (CO2) Absorption
Primary amines are moderately strong bases and powerful nucleophiles. Liquid alkyl primary amines possess volatile, sharp ammoniacal odors and are highly hygroscopic, rapidly absorbing atmospheric carbon dioxide (CO2) to form solid white carbamate precipitates. At OUHE Technology, we prevent air-sensitive carbamate crusting and oxidation by packaging our primary amines under dry nitrogen in moisture-barrier, hermetically sealed containers.
Versatile Synthetic Handles: From Schiff Bases to Diazonium Couplings
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Aliphatic Alkylamines: Highly active nucleophilic centers ideal for alkylation, acylation to yield amides, and Schiff base (imine) condensations with aldehydes.
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Substituted Anilines (Arylamines): Essential precursors for diazotization reactions, yielding reactive diazonium intermediates for Sandmeyer halogenations and azo-dye couplings.
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Stabilized Amine Salts: Solid hydrochlorides and sulfates designed to eliminate volatility and atmospheric oxidation while ensuring highly consistent reactant stoichiometric control.
Eliminating Carbonyl/Acid Impurities and Verification of Amine Titer
Because primary amines can degrade via oxidation or reaction with ambient carbon dioxide, verifying active amine titer is a major quality concern. We utilize high-resolution capillary GC-FID or HPLC with base-deactivated columns to prevent peak tailing and accurately measure purity. Every batch is validated via NMR and Mass Spectrometry (MS) through our academic partnerships, ensuring batch-to-batch consistency.
Frequently Asked Questions
A: Highly basic primary amines rapidly absorb atmospheric carbon dioxide (CO2) and humidity to form solid amine carbamates. We prevent this by packaging our moisture-sensitive amines under dry nitrogen in airtight containers.
A: Amine salts (like hydrochlorides) are stable, non-volatile solids with zero ammoniacal odor and high resistance to oxidation. They are significantly easier to weigh and handle, ensuring precise stoichiometric control.
A: Amines often interact with acidic silanols in standard chromatography columns, causing peak tailing. We resolve this by using high-resolution capillary GC-FID or HPLC equipped with base-deactivated stationary phases, confirmed by detailed NMR spectra.