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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Diss Factsheets
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EC number: 232-156-2 | CAS number: 7789-29-9
- 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
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PBT assessment
Administrative data
PBT assessment: overall result
- PBT status:
- the substance is not PBT / vPvB
- Justification:
Classification for Persistence
Potassium hydrogendifluoride is an inorganic substance and so the issue of biodegradation does not apply. The substance dissociates rapidly to its constituent ions in the aqueous environment, forming K+, H+ and F- ions which are naturally ubiquitous in the terrestrial and aquatic compartments of the environment. As such potassium hydrogenfluoride does not satisfy the criteria for classification as persistent.
Classification for Bioaccumulation
No data is available for bioaccumulation of potassium hydrogendifluoride. However, the substance is considered to have a low potential for crossing biological membranes and dissociates fully to its constituent ions (K+, H+ and F-) in aqueous environments. Data available for potassium and fluoride indicates that bioaccumulation will not occur and as the behaviour of these species is well characterised, no further information is required. As such potassium hydrogendifluoride is not considered to satisfy the criteria for classification as bioaccumulative.
Classification for Toxicity
The toxic effects of potassium hydrogendifluoride are considered to be primarily due to fluoride ions from dissociation of the substance. Tests carried out with an appropriate read-across substance found that no classifacation for acute or chronic toxcity is triggered based on the criteria set out in EU regulation 1272/2008 (CLP) or under Annex XII of REACH. As such, the substance is not considered toxic.
- Likely routes of exposure:
No significant exposure is expected in the air compartment or through secondary poisoning. Background levels of fluoride in the marine compartment are expected to be greater than those arising from potassium hydrogendifluoride. Exposure to all other compartments is considered.
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.
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