Why volatility matters

Acetone evaporates readily at room temperature. Opening containers, soaking cloths or spreading it over surfaces increases the evaporation area. Its vapours can travel and reach a distant ignition source. Assessing only the location of the container therefore overlooks part of the risk from the process and used waste materials.

Possible health effects

NIOSH identifies eye and respiratory irritation, headache, dizziness and central nervous system depression. High exposure can reduce consciousness. Repeated contact removes protective skin oils and promotes dryness and cracking. Routine use does not make prolonged cleaning or use in a small enclosure harmless.

Tasks to review

Assessment should follow the solvent’s path: receipt, transfer, application, evaporation and removal of cloths. Open quantities, duration, ventilation and nearby people should be recorded. Where measurement is required, the method and sampling period should represent exposure. Indicative concentrations in a foreign information sheet do not replace the reference value applicable to the workplace.

Reducing exposure

Closed dispensing systems, suitable containers kept closed, and extraction where vapour is released should be considered. Substitution of hazardous chemicals should also check the alternative product’s flammability and compatibility. Gloves are selected using acetone-specific chemical resistance data and contact time; a generic glove does not guarantee protection.

Storage and emergencies

Ignition sources and incompatible substances, particularly oxidisers, must be separated, and spill containment planned. Container and equipment materials must be compatible, because acetone can attack certain plastics. Leak response requires a procedure, trained staff and atmosphere assessment; ventilation should not be improvised using unsuitable electrical equipment.

Process control example

In a hypothetical example, a workshop leaves a cleaning tray open throughout the shift. Switching to a closed dispenser reduces evaporation area, but the container for soaked cloths is also reviewed. Follow-up checks consumption, exposure and waste handling. A reduction in smell does not by itself demonstrate an acceptable concentration.