Overview
1,12-Dodecanediol is an organic compound belonging to the class of long-chain aliphatic diols. Its 12-carbon backbone with terminal hydroxyl groups makes it valuable for creating linear polymers and modifying material properties. First synthesized in the mid-20th century, it gained industrial importance as a monomer for specialty polyesters and polyurethanes. The compound is produced through catalytic hydrogenation of dodecanedioic acid derivatives or via hydroformylation processes. Industrial production primarily serves the polymer and personal care sectors, with global manufacturers concentrated in Europe, China, and the United States.
Physical and Chemical Properties
As a saturated aliphatic diol, 1,12-dodecanediol exhibits characteristic properties of long-chain glycols. Its crystalline structure results in a sharp melting point between 80-83°C, while the extended hydrocarbon chain provides hydrophobicity (logP ≈ 4.2). The compound shows excellent thermal stability below 200°C, making it suitable for high-temperature polymer processing. The primary and secondary hydroxyl groups (terminal -OH) demonstrate typical alcohol reactivity, undergoing esterification, etherification, and urethane formation. Unlike shorter-chain diols, its low water solubility (0.01 g/L at 25°C) makes it particularly useful for creating water-resistant coatings and elastomers.
Main Applications
In polymer chemistry, 1,12-dodecanediol serves as a chain extender for polyurethanes and copolyesters, imparting flexibility and hydrolytic stability. It's essential for manufacturing specialty adhesives, thermoplastic elastomers (TPEs), and coatings for automotive and textile applications. The long aliphatic chain improves compatibility with hydrophobic matrices. The personal care industry utilizes it as an emollient and viscosity modifier in creams/lotions, while industrial applications include synthetic lubricant formulations where it acts as a base stock or additive. Emerging uses encompass bio-based plasticizers and as a building block for dendrimer synthesis in advanced materials.
Safety and Storage
Classified as non-hazardous under GHS standards, 1,12-dodecanediol requires standard laboratory precautions. Dust formation should be minimized to prevent respiratory irritation (PEL: 10 mg/m³ total dust). The compound is stable under normal conditions but may form combustible dust concentrations in air. Proper storage involves sealed containers in well-ventilated areas below 30°C, separated from strong oxidizers. Shelf life typically exceeds 2 years when protected from moisture. Spills should be contained with inert absorbents and disposed following local regulations for organic compounds.
B2B Procurement Guide
Industrial buyers should specify technical grade (≥98% purity) or polymer grade (≥99.5%) depending on application. Key quality parameters include hydroxyl value (550-560 mg KOH/g), acid value (<0.5 mg KOH/g), and melting point range. Bulk purchases (drum or tonnage quantities) typically offer 15-30% cost savings versus lab-scale packaging. Leading suppliers include Sigma-Aldrich (for lab quantities), BASF, and Evonik for industrial scale. Asian manufacturers often provide competitive pricing but require strict quality verification. Just-in-time procurement is recommended due to moderate shelf life, with lead times of 2-6 weeks for custom orders.
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