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Physical & Chemical properties

Flash point

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Description of key information

The flash point of diacetone alcohol goes from 42 to 63°C, depending on the acetone content of the substance.The presence of acetone leads to a decrease of the flash point.

Key value for chemical safety assessment

Flash point at 101 325 Pa:
42 °C

Additional information

The flashpoint of Diacetone alcohol with different degrees of purity was examined in a study by Andre (2010) with Klimisch-1 reliability. The study was conducted in compliance with Method A.9. Flash Point of Commision Regulation (EC) No 440/2008, using the closed cup method. 

The flash point of the different samples are :

- flash point of « flacon 1 » is 42.0°C ± 0.5°C (Analytical purity: 97.96%, acetone 1.908%)

- flash point of « flacon 4 » is 50.5°C ± 0.5°C. ( Analytical purity: 98.89% acetone 0.945%)

- flash point of « flacon 2 » is 57.0°C ± 0.5°C , (Analytical purity: 99.34% ,acetone 0.493%)

- flash point of « flacon 3 » is 63.0°C ± 0.5°C , (Analytical purity: 99.85% ,acetone 0.008%)

According to the criteria for classification and labelling set out in Regulation (EC) NO. 1272/2008.

- If the acetone content >0.945% and < 2% , the substance is classified for flammability (42°C <FP<50.5°C)

CLP: Flam liquid Cat3

- if the acetone content is approximatively 0.493% , the substance is classified for flammabilty (FP = 57°C)

CLP: Flam Liquid Cat 3

- If the acetone content is very low (approximatively 0.008%) the substance is not classified for flammability (FP = 63°C)

. In addition, the flash point of DAA (reagent grade) also was sourced from Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals (14th Ed.), known to contain peer-reviewed data of Klimisch-2 reliability, which reported a flash point of 66°C for DAA.