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Diss Factsheets
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EC number: 226-218-8 | CAS number: 5329-14-6
- 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
pH = 2.5; Temp. = 50 ℃; Rate constants for hydrolysis = 4.58 E-5; Half-life = 10.000 - 100.000 h.
The hydrolysis can be ignored in solutions less acidic than pH 4 and at temperatures below 60 ℃.
Key value for chemical safety assessment
Additional information
This data was published in an academic literature, and the method has been detailed in the paper, so it is used as a key study.
At very low pH most of the sulphamate is present as undissociated acid molecules, whereas at high pH the acid exists almost entirely as the free sulphamate ion. Thus, at low pH hydrolysis is rapid, whilst at high pH it is exceedingly slow, so the test was conducted at very low pH and a high temperature.
In the test the titration has been used to figure out the rates of hydrolysis of the sulphamic acid in the pH 1 - 4, and under different temperatures. The hydrolysis rates from pH 1 to 3 with temperatures from 50 to 70 °C have been measured. It was found that abiotic hydrolysis can be ignored at ambient temperature.
Based on this result, it is concluded that no further testing is needed in accordance with the OECD guideline, and sulfamic acid is stable in water at pH 4, 7 and 9 at 25 ºC, with a half-life greater than one year.
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