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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 200-001-8 | CAS number: 50-00-0
Boiling point
Administrative data
Link to relevant study record(s)
Description of key information
The boiling point of pure formaldehyde is ≥-21 °C and ≤ -19 °C at 1013.25 hPa
The boiling point of aqueous formaldehyde solutions is 98.9 - 99.4 °C at 1013.25 hPa
Key value for chemical safety assessment
Additional information
Boiling point pure formaldehyde.
Fifteen published handbooks and/or authoritative online databases were identified containing information on the boiling point of pure formaldehyde. All sources published values in de range of -21 to – 19 °C.
The CRC (2010), Yaws 2010, and Kirk-Othmer (2015) report a boiling point of -19.1 °C.
The Ullmanns Encyclopedia (2012) report a boiling point of -19.2 °C
The REAXYS database (2015, Spence 1935) report a value of -19.3°C and REAXYS (2015, Maslov 1966) report a value of -19.25 °C
The Merck Index (2013), the EPA (2008), and RömpChemie (2015) report a value of -19.5 °C
The Gestis database (2015), Chemsafe (2015) as well as Hawley’s dictionary (2002) report a boiling point of -19 °C
The Knovel database (2012) reports -21 °C.
Both the SYKE online database (2015) and the Verschueren handbook (2001) report the values -21 and -19 °C.
Based on these data the boiling point of pure formaldehyde is determined to be ≥-21 °C and ≤ -19 °C at 1013.25 hPa
Boiling point aqueous formaldehyde solutions
Five sources were identified containing information on the boiling point of aqueous formaldehyde solutions.
In an experimental determination of the boiling of aqueous formaldehyde solutions published by Walker (1967) the boiling point was determined to be 98.9 °C for a 37 % formaldehyde solution containing 1 % methanol. A 45 % and 50 % solution (both containing 1 % methanol) had a boiling point of 99.4 °C.
These results were supported by the
values reported in the following handbooks:
According to The Merck Index (2013) the boiling point for a ca. 37% (wt)
formaldehyde solution in water containing methanol is 96 °C
According to the Ullmanns encyclopedia (2012) the boiling point for pure
aqueous solutions containing up to 55 wt % formaldehyde is ≥99 ≤ 100
°C.
According to Hawley’s dictionary (2012) the boiling point is 96 °C
(Aqueous 37% solution with 15% methanol) and for a methanol free
solution 101 °C. The EPA (2008) also published a
boiling point slightly above the boiling point of water of 101 °C
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.
