Overview
1,9-Nonanediol is an organic compound belonging to the class of long-chain aliphatic diols. As a C9 diol with hydroxyl groups at both termini, it serves as a versatile building block in chemical synthesis. The compound was first characterized in the mid-20th century as part of research into diol homolog series. Industrially, 1,9-nonanediol is produced through catalytic hydrogenation of corresponding diacid or diester precursors. Its moderate chain length and symmetrical structure make it particularly valuable for creating polymers with specific flexibility and crystallinity characteristics.
Physical and Chemical Properties
1,9-Nonanediol exhibits typical diol reactivity, capable of undergoing esterification, etherification, and polycondensation reactions. The crystalline solid has a characteristic mild waxy odor and shows good thermal stability below 150°C. Its solubility profile makes it compatible with both polar and nonpolar solvent systems. The compound's extended hydrocarbon chain provides unique properties compared to shorter diols, including lower hygroscopicity and increased lipophilicity. These characteristics influence its performance in formulations where moisture sensitivity or organic phase compatibility are critical factors.
Main Applications
In polymer chemistry, 1,9-nonanediol serves as a monomer for producing specialty polyesters and polyurethanes. The C9 spacer imparts flexibility and impact resistance to resulting materials, making them suitable for elastomers and coating applications. The cosmetic industry utilizes it as an emollient and viscosity modifier in creams and lotions. Emerging applications include its use as a chain extender in biodegradable polymers and as an intermediate for synthesizing fragrances and plasticizers. Its symmetrical structure also makes it valuable for creating liquid crystal compounds and self-assembling materials.
Safety and Storage
As with many diols, 1,9-nonanediol requires standard chemical handling precautions. The material presents low acute toxicity (LD50 >2000 mg/kg oral, rat) but can cause eye and skin irritation upon direct contact. Proper ventilation and chemical-resistant gloves are recommended during handling. For long-term storage, keep containers tightly sealed in a cool (below 30°C), dry environment away from strong oxidizers. The compound is stable under recommended storage conditions but may absorb moisture over time, potentially affecting product quality in precision applications.
B2B Procurement Guide
Industrial buyers should specify required purity (typically 98-99%), packaging format (drums or bulk), and any analytical certificates needed. Technical grade suffices for polymer applications, while cosmetics/pharma uses may require higher purity with additional testing. Lead times vary from 2-6 weeks depending on supplier inventory. When comparing suppliers, verify production methods (hydrogenation vs. other routes) as this affects byproduct profiles. Consider requesting samples for compatibility testing, especially for polymer formulations. Current market trends show stable supply but with periodic fluctuations due to raw material availability for C9 feedstocks.
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