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Diss Factsheets
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EC number: 914-103-1 | CAS number: -
- 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
Hydrolysis
Administrative data
Link to relevant study record(s)
Description of key information
According to structural properties, hydrolysis is not expected/probable.
Key value for chemical safety assessment
Additional information
According to structural properties, hydrolysis is neither expected nor probable in either ammonium sulphate, potassium sulfate or sodium sulphate. All three substances are very soluble and completely dissociate in aqueous solutions into their constituent ion and the sulphate anion. Depending on pH, ammonia (NH3) exists in equilibrium with the ammonium ion (NH4+), according to the following relationship:
NH4++ H2O <-> NH3+ H3O+
In general, as the pH increases, the fraction of the total ammonia which is un-ionised also increases. For example, at 5 °C and pH 6.5, 0.0395% of the total ammonia is present as NH3. Increasing the pH from 6.5 to 8.5 will increase the un-ionised ammonium by a factor of approximately 100 (Rice and Bailey 1980). Increasing the temperature will also increase the percentage of unionized ammonium. For example, in seawater at 25 °C and pH of approximately 8.1, approximately 7% of the total ammonia is present as NH3.
References:
Holt, G. J., and Arnold, C. R. (1983). Effects of Ammonia and Nitrite on Growth and Survival of Red Drum Eggs and Larvae. Transactions of the American Fisheries society 112: 314-318.
Rice and Bailey, J. E. (1980). Survival, size, and emergence of pink salmon, Oncorhynchus gorbuscha, alevins after short- and long-term exposures to ammonia. Fishery Bulletin. 78: 641-648.
OECD (2005). SIDS Initial Assessment Report. Sodium sulfate, CAS No 7757-82-6. UNEP publications.
OECD (2007a). SIDS Initial Assessment Report. Ammonium sulfate, CAS No 7783-20-2. UNEP publications.
OECD (2007b). SIDS Initial Assessment Report. Potassium Sulfate, CAS No 7778-80-5. UNEP publications.
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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