N-Methylaniline (NMA), also known by its CAS number 100-61-8, has emerged as a significant player in the petroleum industry, particularly for its role as a non-traditional antiknock agent. Its ability to increase the octane number of gasoline makes it an attractive additive for refiners and fuel distributors seeking to improve fuel performance and meet market demands for higher octane fuels.

NMA is typically added to gasoline in concentrations around 1.3% by volume. This dosage is often managed to prevent excessive gum formation, which can lead to increased carbon deposits in engines. Regulatory agencies in many regions permit higher concentrations of NMA, provided that detergent additives and fuel combustion modifiers are also included. These accompanying additives are crucial for mitigating gum formation and ensuring the overall integrity of the fuel system. When blended within these guidelines, NMA is considered to have a toxicity profile comparable to other components commonly found in gasoline.

The regulatory landscape surrounding NMA as a fuel additive varies globally. In China, for instance, the use of NMA and other aniline-type compounds in gasoline is restricted under standard directive GB17930-2013, prohibiting intentional addition of substances recognized as harmful. In the United States, the Environmental Protection Agency (EPA) regulates fuel additives under the Clean Air Act. While neat NMA may not be on the list of registered additives, registration for higher concentrations is possible with appropriate detergents and modifiers. European Union standards also provide guidelines for fuel composition, and NMA, not being an oxygenate, is not listed among recommended oxygenates in EU petrol standards.

The Worldwide Fuel Charter, which outlines emission standards for unleaded gasoline, also reflects these varying approaches. While NMA is banned in some countries like China and Russia, many others align with the registration and environmental policies of the United States and Europe. For fuel producers and distributors, understanding these regulations and the efficacy of NMA as an octane enhancer is crucial for compliant and effective fuel formulation. Companies like NINGBO INNO PHARMCHEM CO.,LTD. can provide high-quality N-Methylaniline, supporting the industry's needs while navigating the complex regulatory environment.