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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 231-512-4 | CAS number: 7601-90-3
- 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
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Perchloric acid is considered to have a low potential adsorption onto soil and sediment.
Key value for chemical safety assessment
- Koc at 20 °C:
- 43.89
Additional information
Perchloric acid is a strong inorganic acid and therefore it will be under dissociated form in all environmental compartments. Because of the high water solubility of perchlorate salts, perchlorate is unlikely to accumulate via adsorption to irrigated soil. Similarly, concentrations of perchlorate in soil pore water may be assumed to be equal to the concentration in irrigation water.
Due to the inorganic ionic nature of perchlorate, the adsorption coefficient is highly soil dependent. One reliable key study has been selected for the determination of the adsorption/desorption potential. In this study (Urbansky and Brown, 2003), portions of soil medium were dispensed into centrifuge tubes with addition of Aliquot of deionized water and aliquot of stock solutions of perchlorate salts. The tubes were capped and rotated end-over-end for 2-3 or more days, at ambient temperature to permit equilibration. The tubes were centrifuged and the aqueous phase was analysed by ion chromatography. At low level exposure more than 90% of the perchlorate was recovered in the aqueous phase. The authors suggested that the intrasoil perchlorate content is depositional rather than adsorptive. Although this paper suggests a low potential of adsorption onto soil, no adsorption coefficient (Koc) value is reported.
Some monitoring studies show that contamination of soil by perchlorate is observed in some areas. However, it is recognized that this contamination is a result of direct spills of perchlorate solution, which does not happen for the uses of perchloric acid identified and covered in the REACH dossier. Perchlorate salts that are released to the soil in solid form will readily dissolve in whatever moisture is available. If sufficient infiltration occurs, the perchlorate is expected to be completely leached from the soil. In arid regions, crystallized perchlorate salts may accumulate at various horizons in the soil due to evaporation of infiltrating rainfall that leached perchlorate from shallower depths.
As no direct spills of perchloric acid onto soil takes place via the identified uses in the REACH dossier, the Koc value will be used only to assess the potential of adsorption onto soil and sediment from water containing perchlorate. In this frame of transport between environmental compartments, the low adsorption potential onto soil and sediment should be considered for the environmental exposure assessment. So, a Koc value can be calculated by QSAR model. Although inorganic compounds are outside the applicability domain of the EPISUITE model, this model is the most relevant for this endpoint and therefore it is used to estimate a Koc value of perchlorate as reported below.
KOCWIN v2.00 result estimation for:
- perchloric acid (SMILES : O=CL(=O)(=O)O)
- sodium perchlorate (SMILES : O=CL(=O)(=O)O([Na]))
Estimated Koc from MCI = 43.89 L/Kg (LogKoc = 1.6424).
Both substances give to the same estimated value.
This estimated Koc value is consistent with the conclusion of low adsorption onto soil and sediment.
[LogKoc: 1.6424]
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.