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EC number: 231-639-5 | CAS number: 7664-93-9
- 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

Additional ecotoxological information
Administrative data
- Endpoint:
- additional ecotoxicological information
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Published, investigative non-guideline, non-GLP study.
Cross-reference
- Reason / purpose for cross-reference:
- reference to same study
Data source
Referenceopen allclose all
- Reference Type:
- publication
- Title:
- Increase in the abundance of cladocera at pH 5.1 in experimentally-acidified Lake 223, Experimental Lakes Area, Ontario
- Author:
- Malley, DF & Chang, PSS
- Year:
- 1 986
- Bibliographic source:
- Water, Air, and Soil Pollution 30 (1986) 629-638
- Reference Type:
- secondary source
- Title:
- SULFURIC ACID CAS No. 7664-93-9: SIDS Initial Assessment Report for 11th SIAM
- Author:
- OECD
- Year:
- 2 001
- Bibliographic source:
- UNEP Publications
Materials and methods
Test guideline
- Qualifier:
- no guideline available
- Principles of method if other than guideline:
- The pH of Lake 223, Ontario, Canada, was lowered from 6.7 in 1974 to 5.1 by 1981. Samples of cladocera were taken each year and the species composition and overall biomass were monitored.
- GLP compliance:
- no
- Type of study / information:
- Published paper describing experimentally derived results.
Test material
- Reference substance name:
- Sulphuric acid
- EC Number:
- 231-639-5
- EC Name:
- Sulphuric acid
- Cas Number:
- 7664-93-9
- Molecular formula:
- H2O4S
- IUPAC Name:
- sulfuric acid
- Details on test material:
- None available
Constituent 1
Results and discussion
Any other information on results incl. tables
Total zooplankton biomass was not reduced by acidification and may have increased in 1980. Prior to acidification, mean ice-free season biomass was 269 mg/m2, during 1977 to 1980 it was 318, 218, 204 and 401 mg/m2 respectively. During 1981 to 1984 biomass was 279, 236 and 247 mg/m2. Although total biomass did not greatly change with acidification, total biomass of cladocerans increased during1918 to 1983. This occurred at the expense of calanoid copepods and to a lesser extent cyclopoid copepods. In 1974 adults of D. minutus were present at a biomass of 33 mg/m2. During 1981 to 1983 their biomass was 26, 17 and 24 mg/m2. Cladocerans also exhibited marked changes in species composition. The community in 1974 at pH 6.7 was dominated by Daphnia galeata mendotae with Diaphanosoma birgei and Bosmina longirostris also present, Holopedium gibberum was rare. At pH 5.1 Daphnia catawba, H. gibberum and B. longirostris were all abundant. D. birgei and D. g. mendotaehad dissappeared or become rare. D. catawba recorded for the first time in 1980 was usually the sole daphnid at pH 5.1, it replaced D. g.mendotaealmost entirely during the 1918 to 1983 period. Chaoborus has been incidentally samples along with the zooplankton, there is no evidence it changed markedly in abundance with acidification.
Applicant's summary and conclusion
- Conclusions:
- The reported study is adequate in demonstrating the effects of lowering pH on the compostion and structure on cladocera.
- Executive summary:
The zooplankton community was analysed by identifying the species and counting them. A NOEC for population repartition (from copepod to cladoceran dominance) was pH 5.59 (equivalent to 0.13 mg/L). This NOEC integrates not only reproductive success, but also prey/predator relationships, (presence/lack of suitable food as smaller invertebrates or aquatic plants/algae, presence/lack of fish predators). The NOEC also integrates the effects of successive one-tear exposures to pH 6.49, 6.13, 5.93 and 5.64.
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