Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Diss Factsheets
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: 235-185-9 | CAS number: 12125-01-8
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Melting point / freezing point
Administrative data
Link to relevant study record(s)
Description of key information
Ammonium fluoride decomposes at circa 100°C before reaching its melting point according to the following reaction: 2 NH4F --> NH4HF2 + NH3
To enable the chemical safety assessment to be performed, the melting point was estimated using EPI Suite v4.10 (MPBPVP v1.43). The estimated value was 268.22°C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 268.22 °C
Additional information
The Gmelin handbook of inorganic chemistry (1924) states that the decomposition temperature for ammonium fluoride, circa 100°C, is reached before the substance reaches its melting point (decomposition temperature is assumed to be reported at one atmosphere).
The CRC Handbook of Chemistry and Physics, 65th edition, B-71 (1984) stated that NH4F sublimates. Indeed, the review article by Rakov and Mel'nichenko (1984) showed that ammonium fluoride decomposes as a result of heating according to the following equation: 2 NH4F (crystalline) --> NH4HF2 (crystalline) + NH3 (gas).
However, according to the CRC Handbook of Chemistry and Physics, 91st edition (2010 -2011) the melting point of ammonium fluoride was 238°C. This value is in agreement with our estimated value of 268.22°C. This latter estimation, performed using EPI Suite v4.10 (MPBPVP v1.43), enabled execution of the chemical safety assessment for the ammonium fluoride dossier.
Considering the origin of the value in the CRC Handbook of Chemistry and Physics, 91stedition (2010 -2011) was not clearly cited and the decomposition is a well known fact supported by literature, it may be the result of an estimation method instead of experimental data.
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.