An explosion took place on Monday, September 21, at the Pharmasynthèse SA factory in Saint-Pierre-lès-Elbeuf, located in the Seine-Maritime department in northern France. The facility is classified as a Seveso low threshold site, which means it is subject to specific regulations due to the potential risks associated with the substances it handles. The incident occurred in the afternoon, and initial reports indicate that a man suffered serious burns, while another source mentioned that one person was injured. Local authorities confirmed that firefighters were able to quickly contain the situation, with no emissions or need for a containment zone reported. According to the prefecture, the event was internal to the company and did not pose a risk to the surrounding population or nearby residents. A victim was described as being "in transit," suggesting they were being transported for medical treatment. Pharmasynthèse SA, as stated on its website, specializes in the design and production of ingredients used in pharmaceutical and cosmetic products. Local media also reported that the prefecture had issued a notice to the factory in March 2025, citing incomplete studies on the characterization of volatile organic compound emissions. These compounds are often found in industrial processes and can have environmental and health impacts if not properly managed. However, the notice was lifted at the beginning of June, indicating that the required measures had been addressed. The incident has raised questions about the safety and regulatory compliance of the facility, especially given its classification as a Seveso site. While authorities have downplayed the risk to the public, the occurrence of an explosion and the prior regulatory concerns highlight the importance of ongoing oversight in such industrial settings.