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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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Description of key information

conversion factors at 1013 hPa and 20°C are: 
1 mg/m³=0.43 ppm; 1 ppm=2.328 mg/m³
odor perception: 0.07 mg/m³
recognition threshold: 0.48 mg/m³

Additional information

1. European Union Risk Assessment Report of Acrolein (EU, 2001)

Conversion factors (1013 hPa)

            20°C: 1 mg/m³=0.43 ppm; 1 ppm=2.33 mg/m³

            25°C: 1 mg/m³=0.44 ppm; 1 ppm=2.29 mg/m³

Odor perception threshold: 0.07 mg/m³

Odor recognition threshold: 0.48 mg/m³

2. Agreement with further international Reports and Studies published after finalisation of the EU Risk Assessment Report 2001

US ATSDR (2007):

Conversion factors (1013 hPa): 1 mg/m³=0.43 ppm; 1 ppm=2.328 mg/m³

Odor threshold: 0.11 ppm (water), 0.16 ppm (air)

3. Substantial disagreements in comparison to further international Reports to European Union Risk Assessment Report 2001

None

4. Additional aspects in further international Reports

None

5. Additional information in newer Studies, not included in the European Union Risk Assessment Report 2001 or further cited international reports

None

6. Conclusions

The conversion factors at 1013 hPa and 20°C are: 1 mg/m³=0.43 ppm; 1 ppm=2.328 mg/m³ and the odor perception and recognition threshold are 0.07 mg/m³ and 0.48 mg/m³, respectively.