Understanding the fundamental chemistry of key industrial intermediates is crucial for optimizing their use and ensuring safe handling. 3-Nitrotoluene (CAS 99-08-1), also known as m-Nitrotoluene, is a vital compound whose properties and synthesis pathways are of significant interest to chemists and engineers in various industries. This article explores the core chemical characteristics and common production methods for this versatile molecule.

Physical and Chemical Properties of 3-Nitrotoluene

3-Nitrotoluene is characterized by its appearance as a transparent light yellow to brown liquid. It possesses a distinct odor, often described as nitrobenzene-like. Key physical properties include a melting point of approximately 15-16 °C and a boiling point around 230-231 °C. With a density of about 1.157 g/mL at 25 °C, it is denser than water and largely insoluble in it, though it exhibits solubility in common organic solvents like ethanol, ether, and benzene. Its flash point is typically around 106 °C, classifying it as a combustible liquid.

Chemically, the presence of the nitro group (-NO2) and the methyl group (-CH3) on the benzene ring gives 3-Nitrotoluene its reactivity. The nitro group is electron-withdrawing, influencing the aromatic ring's reactivity in further substitutions. It is incompatible with strong oxidizing agents, reducing agents, and strong bases, which can lead to hazardous reactions, including fire and explosion potential under certain conditions. Heat above 190 °C may also cause explosive decomposition.

Synthesis Pathways for 3-Nitrotoluene

The primary industrial method for producing 3-Nitrotoluene involves the nitration of toluene. This is typically carried out using a mixture of nitric acid and sulfuric acid (mixed acid). The reaction conditions, particularly temperature, influence the isomer distribution. While direct nitration predominantly yields ortho- and para-nitrotoluene isomers, specific conditions and subsequent separation techniques, such as fractional distillation, are employed to isolate the desired meta-isomer. For instance, after removing the more abundant ortho-isomer, the meta-nitrotoluene can be purified.

Sourcing High-Quality 3-Nitrotoluene

For procurement managers and research scientists, understanding these chemical properties and synthesis routes is essential when sourcing 3-Nitrotoluene. Ensuring that a manufacturer provides material with a verified assay (typically ≥98%) and clear documentation is paramount for successful application. NINGBO INNO PHARMCHEM CO.,LTD. is a reliable supplier that offers high-purity 3-Nitrotoluene, backed by comprehensive technical data and a stable supply chain. We invite you to contact us to request a quote and ensure you are sourcing this critical intermediate from a quality-assured manufacturer.