Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 200-836-8 | CAS number: 75-07-0
Endpoint summary
Administrative data
Description of key information
Additional information
Acetaldehyde is a colourless, clear liquid with a pungent, suffocating odour. Acetaldehyde is an extremely flammable liquid and vapour when exposed to heat or flame and is explosive. Acetaldehyde reacts violently with acid anhydrides, alcohols, ketones, phenols, NH3, HCN, H2S, P, halogens, isocyanates, strong alkalis and amines. It is completely miscible in water and most common organic solvents.
The relative molecular mass of Acetaldehyde is 44.05 g/mol. Its freezing point is -123.5°C and its boiling point is 20.2°C at 101.3 kPa. The octanol/water partition coefficient has been determined to be log Pow = 0.63. Its vapour pressure at 25°C is 120.2 kPa. The relative vapour density is 1.52. The measured density at 18°C is 0.785 g/cm3.
The flash point was determined to be -38.89°C, in a closed cup and -40°C using the open cup method. The autoignition temperature is 175 °C. The explosion limits of mixtures with air are between 4 and 57 vol % acetaldehyde.
According to Regulation (EC) No 1272/2008, acetaldehyde is classified as Flammable Liquid; Category 1 with Hazard Statement H224: Extremely flammable liquid and vapour.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
