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Diss Factsheets
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EC number: 231-449-2 | CAS number: 7558-80-7
- 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
Endpoint summary
Administrative data
Description of key information
Additional information
Typically the purity of sodium dihydrogenorthophosphate is > 90% (dry weight, after excluding water). All impurities present at >1% are other inorganic phosphates or other related inorganic substances, similar to the Registered substance, and which do not significantly affect its toxicological and ecotoxicological properties. There are no hazardous impurities present within the substance at levels >0.1%.
Sodium dihydrogenorthophosphate has a melting point of >450°C and is considered to be very soluble (>50.2 <52 % (w/w) at 20°C). The pH of this solution, observed in the water solubility study, was between pH3.6 to pH 4. The water solubility study conducted on sodium dihydrogenorthophosphate made the following observations:
The test material studied is essentially sodium dihydrogenorthophosphate following a degree of basification. For example, if an existing, acidic sample solution of sodium dihydrogenorthophosphate was adjusted towards a basic pH by the addition of sodium hydroxide, the resulting salt formed would be that of disodium hydrogenorthophosphate. As water solubility data for this analogous salt exists (>23.8 < 25.1 % (w/w) at 20°C, pH 9.2. O’Connor BJ, 2009, Harlan Laboratories Ltd, 2920/0004) and as it incorporates the environmentally relevant pH of interest, it can be concluded that the solubility of the sodium dihydrogenorthophosphate would decrease slightly as the pH increased over the pH range of 4 to 9. However, it must be noted that solubility would still remain high (in the range 23.8 to 25.1% w/w at 20°C, pH 9.2) and such a decrease would only be observed if significant buffering capacity was present which prevented the formation of an acidic solution as formed on dissolution of the test material.The temperature range of 10 to 30°C had no significant influence on the observed solubility of the test material.
Sodium dihydrogenorthophosphate is not considered to possess any of the following hazardous physico-chemical properties: autoflammability and/or self-ignition, flammability, explosiveness and oxidising properties.
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.
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