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EC number: 231-043-5 | CAS number: 7420-89-5
- 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
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- From 10 JUL 2017 to 10 AUG 2017
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
- Report date:
- 2017
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 A (Ready Biodegradability: DOC Die Away Test)
- Version / remarks:
- Following OECD 301A resp. EU C.4 - A
- Deviations:
- no
- Remarks:
- Principles of method if other than guideline:
- Temperature range was 19.5 – 22.2 °C and the samples were stored in the fridge for 72 hours (3.7-7.0°C).
Degradation of the positive control was in the normal range this is considered as uncritical concerning the outcome of the study. - GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- Disodium 1,5-dihydroxypentane-1,5-disulphonate
- Cas Number:
- 7420-89-5
- Molecular formula:
- C5H10Na2O8S2
- IUPAC Name:
- Disodium 1,5-dihydroxypentane-1,5-disulphonate
- Reference substance name:
- Sodium sulfate
- Cas Number:
- 7757-82-6
- IUPAC Name:
- Sodium sulfate
- Reference substance name:
- Sodium hydrogen sulfite
- Cas Number:
- 7631-90-5
- IUPAC Name:
- Sodium hydrogen sulfite
Constituent 1
impurity 1
impurity 2
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- other: Activated sludge from a biologic sewage treatment plant was used. The chosen plant treats mostly domestic sewage.
- Details on inoculum:
- Activated sludge was used as inoculum (concentration in the test 25.0 mg dry matter/L).
- Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 206.4 mg/L
- Based on:
- DOC
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- DOC removal
- Details on study design:
- Aniline was chosen as positive control.
The test item was tested using a concentration of 39.9 mg organic carbon/L (corresponding to 206.4 mg test item Glutardialdehyde bis-Sodiumbisulfite/L) in test medium.
Results and discussion
- Preliminary study:
- The sludge was filtrated through a clean cotton cloth, then washed with tap water twice, with test medium once and resuspended in test medium. It was then aerated until use in the test. Determination of dry matter gave 3720 mg suspended solids/L.
% Degradation
- Key result
- Parameter:
- % degradation (DOC removal)
- Value:
- 92
- Sampling time:
- 28 d
- Remarks on result:
- other: The degree of biodegradation reached 92 % after 28 days
- Details on results:
- The validity criteria were met. Degradation behaviour of positive control and toxicity control was normal. Both replicates of the test item showed very good correspondence. After 9 day a plateau of degradation above 80 % was observed. As degradation in the toxicity flask was 89 % after 14 days, the test item can be stated as not toxic towards the inoculum in a concentration of 206.4 mg/L. A time-delayed reduction of DOC was observed also in the adsorption control and the abiotic control. Abiotic degradation reached 24 % at the end of the test and the adsorption control reached 63 %. This might be caused by adsorption of the test item onto the bacteria in the adsorption control and precipitation of dissolved test item in the abiotic control. No observations were made which might cause doubts concerning the validity of the study outcome. The result of the test can be considered valid.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Remarks:
- Difference within replicates at the end was 0.3 % (criterion: ≤ 20 %). Positive control reached the pass level of 70 % on day 6 (98 %) (criterion: > 70 % within 14 d). Total biodegradation in the toxicity control after 14 da was 89 % (criterion: > 35 %)
- Interpretation of results:
- readily biodegradable
- Conclusions:
- The 10-day-window began on day 2, at its end, 88 % were reached, surpassing the pass level of 70 % stated in the OECD Guideline. The degree of biodegradation reached 92 % after 28 days. The test item can be considered as „readily biodegradable“.
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