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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 606-630-8 | CAS number: 20765-98-4
- 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
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
The 48-hour EC50 for Daphnia magna is 290 µg Rh L-1.
Key value for chemical safety assessment
Additional information
Okamoto et al. (2014) assessed the toxicity of 50 metals, including rhodium (as rhodium trichloride hydrate) to Daphnia magna. The study followed OECD guideline 202, with 5 test concentrations included and a spacing factor of 2. pH of the test solutions was adjusted using sodium hydroxide. Test concentrations were analysed using ICP-MS and results reported based on measured values. The study is assigned a Klimisch score of 2 (reliable with restrictions) as it followed a standard test guideline, but is not GLP compliant and as a number of metals were tested in the same study some of the methodological details and the individual data for each metal are not reported. The 48-hour EC50 for Daphnia magna is 290 µg Rh L-1.
The acute toxicity of rhodium to the freshwater amphipod Hyalella azteca was assessed in the publication by Borgmann et al. (2005) and this is included as a supporting study. The study is reliable with acceptable restrictions; it is non-GLP and has some limitations in study design or reporting, but is otherwise adequate for assessment. A static test of 7 days was carried out. Rhodium was tested in solution with 10% HCl, which was used as preservant. Two test series were conducted using tap water and soft water. Multiple tests were conducted, but only one or a few concentrations of Rh were included in each test. The data were then pooled and analyzed as if they had all been obtained from a single test. Metal concentrations were analysed in the soft water series only.
Based on nominal concentrations, the 7-day LC50 of rhodium (with 10% HCl) to Hyalella azteca in soft water and tap water were determined to be 980 μg Rh L-1, and >3150 μg Rh L-1, respectively. Based on measured concentrations, the 7-day LC50 of rhodium (with 10% HCl) to Hyalella azteca in soft water was determined to be 804 μg Rh L-1.
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.