Auto-ignition Temperature

Little Pro on 2016-01-13

Auto-ignition temperature is the lowest temperature at which a chemical will spontaneously ignite in a normal atmosphere without an external source of ignition, such as a flame or spark. You can often find it in the section 9 of safety data sheets.

Regulatory Implications of Auto-ignition Temperature

Knowing the auto-ignition temperature of a chemical is very important for its storage & transport. If a chemical has a low auto-ignition temperature, it shall be handled very carefully to avoid fire.

Auto-ignition test can be conducted for gases, solids and liquids. Under REACH, this study does not need to be conducted:

• if the substance is explosive or ignites spontaneously with air at room temperature, or
• for liquids non flammable in air, e.g. no flash point up to 200 °C, or
• for gases having no flammable range, or
• for solids, if the substance has a melting point <=200 °C, or if preliminary results exclude self-heating of the substance up to 400 °C.

Other Physicochemical Properties

• Physical State, Appearance & Odour;
• Melting point;
• Boiling Point;
• Relative Density;
• Flash Point;
• Vapor Pressure;
• Henry's Law Constant;
• Surface Tension;
• Water Solubility;
• n-Octanol/Water Partition Coefficient;
• pH;
• Flammability;
• Oxidising Properties;
• Explosive Properties;
• Granulometry;
• Explosive Limits;
• Viscosity;
• Dissociation Constant;

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 Tags: Topics - CRA, Physiochemical Property