An employee, who had been a temporary employee since May 2005, had a heart attack in a cosmetic commodities manufacturing plant. The accident occurred on production line no. 1 of the UP2 production unit during the manufacture of 2-methyl-5-hydroxyethylaminophenol, a dye used in the formulation of haircare products. During the final stage of synthesis, the product is crystallised (powder), spun and dried to contain only 5% of water at most. The victim was discovered on the centrifugal station, with the top part of his body (arms and half of his torso) jammed in the centrifugal machine at the open manhole. The exact nature of the operations carried out before and during the accident was not established. Nitrogen was detected in the centrifugal machine: 45 min after the tragic event, 8 to 10% of oxygen was measured in the gaseous vapour of the centrifugal machine, close to the manhole. The origin of the nitrogen was yet to be determined, even though this gas is usually injected at various stages during the spinning to prevent the chemical substance from oxidising in the air. Below the centrifugal machine and connected to it by a chute, the dryer was in a nitrogen atmosphere. The inert gas present in the dryer could therefore have migrated towards the centrifugal machine via the chute. This scenario had not been retained in the safety report. Production was stopped and line no. 1’s equipment was switched over to safety mode. The work inspection authority carried out an enquiry. The victim’s family filed a lawsuit for involuntary manslaughter.