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EC number: 951-963-7 | 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
Skin irritation / corrosion
Administrative data
- Endpoint:
- skin irritation: in vitro / ex vivo
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Study period:
- 24.06.2020-17.07.2020
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Report date:
- 2020
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 431 (In Vitro Skin Corrosion: Human Skin Model Test)
- GLP compliance:
- yes
Test material
Reference
- Name:
- Unnamed
- Type:
- Constituent
- Type:
- Constituent
- Type:
- Constituent
- Test material form:
- other: wet sticky solid
- Specific details on test material used for the study:
- Test Item Zinc chlorohydroxy sulphate and copper sulphide, precipitation Synonym: „Sulphide precipitate “
Lot No. 20190601
CAS No. Not provided
EINECS-No. 951-963-7
Molecular Formula Not provided
Molecular Weight Not provided
Purity 100 % (UVCB), Multi-constituent substance.
Main components
Zinc Chloride Sulphate Hydroxide Hydrate (Zn12(OH)15(SO4)3Cl3 x H2O)
Sodium Sulphate (Na2SO4)
Copper Sulfide (CuS)
Sodium Chloride (NaCl)
Appearance blackish-green, wet sticky solid
Solubility Water - poor
Homogeneity homogenous
Production Date Not known
Expiry Date 31st December 2025
Storage Room temperature 25±5°C
Test Item Handling and Storage Melting point: 120°C, Protect from light, protect from humidity
In vitro test system
- Test system:
- human skin model
- Source species:
- human
- Cell type:
- non-transformed keratinocytes
- Justification for test system used:
- The RhE-based skin corrosion test methods have shown to be predictive of in vivo skin corrosion effects assessed in rabbits according to the OECD guideline 404.
- Vehicle:
- unchanged (no vehicle)
- Details on test system:
RECONSTRUCTED HUMAN EPIDERMIS (RHE) TISSUE
- Model used: The reconstructed human epidermal model EpiDerm™
- Tissue batch number(s): Lot No. 30880; strain 00267
- Production date: 5.7.2020
- Delivery date: 13.7.2020
- Date of initiation of testing: 13.7.2020
TEMPERATURE USED FOR TEST SYSTEM
- Temperature used during treatment / exposure: RT
REMOVAL OF TEST MATERIAL AND CONTROLS
-Volume and number of washing steps: 20 times
MTT DYE USED TO MEASURE TISSUE VIABILITY AFTER TREATMENT / EXPOSURE
- MTT concentration: 1mg/mL
- Incubation time: 3h
- Spectrophotometer: Spectrophotometer MRX Dynex, UK Spectra MRX / 1SPA0086
- Wavelength: 570 nm
FUNCTIONAL MODEL CONDITIONS WITH REFERENCE TO HISTORICAL DATA
- Viability:
- Barrier function:
- Morphology:
- Contamination:
- Reproducibility:
NUMBER OF REPLICATE TISSUES: 2
CONTROL TISSUES USED IN CASE OF MTT DIRECT INTERFERENCE
- Fresh tissues / killed tissues
- Procedure used to prepare the killed tissues (if applicable):
- N. of replicates :
- Method of calculation used:
NUMBER OF INDEPENDENT TEST SEQUENCES / EXPERIMENTS TO DERIVE FINAL PREDICTION: A single testing run composed of at least two tissue replicates should be sufficient for a test chemical when the resulting classification is unequivocal. However, in cases of borderline results, such as non-concordant replicate measurements, a second run may be considered, as well as the third one in case of discordant results between the first two runs.
PREDICTION MODEL / DECISION CRITERIA (choose relevant statement)
- The test substance is considered to be corrosive to skin if the viability after 3 minutes exposure is less than 50%, or if the viability after 3 minutes exposure is greater than or equal to 50 % and the viability after 1 hour exposure is less than 15%.
- The test substance is considered to be non-corrosive to skin if the viability after 3 minutes exposure is greater than or equal to 50% and the viability after 1 hour exposure is greater than or equal to 15%.- Control samples:
- yes, concurrent negative control
- yes, concurrent positive control
- Amount/concentration applied:
- TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 25 mg
NEGATIVE CONTROL
- Amount(s) applied (volume or weight): 50 μl
POSITIVE CONTROL
- Amount(s) applied (volume or weight): 50 μl
- Concentration (if solution): 8 N KOH - Duration of treatment / exposure:
- 3-minute and 1-hour time points.
- Number of replicates:
- 2
Test system
- Amount / concentration applied:
- Amount(s) applied (volume or weight): 25 μl
POSITIVE CONTROL
- Amount(s) applied (volume or weight): 25 μl
- Concentration (if solution): 5%
Results and discussion
In vitro
Resultsopen allclose all
- Irritation / corrosion parameter:
- % tissue viability
- Run / experiment:
- 1-hour exposure
- Value:
- 65
- Negative controls validity:
- valid
- Remarks:
- 100
- Positive controls validity:
- valid
- Remarks:
- 6.5
- Irritation / corrosion parameter:
- % tissue viability
- Run / experiment:
- 3-min exposure
- Value:
- 93.2
- Negative controls validity:
- valid
- Remarks:
- 100
- Positive controls validity:
- valid
- Remarks:
- 62.4
- Other effects / acceptance of results:
- - OTHER EFFECTS:
- Visible damage on test system: no
- Direct-MTT reduction: The test item was checked for possible direct MTT reduction before the study was started. No color change were observed.
- Colour interference with MTT: The test item was checked for possible color interference before the study was started. Some non-colored test items may change into colored items in aqueous conditions and thus stain the skin tissues during the exposure. No color changes were observed.
ACCEPTANCE OF RESULTS:
- Acceptance criteria met for negative control: The relative mean tissue viability obtained after 15 ± 0.5 minutes treatment with the test item compared to the negative control tissues was 6.8%. The absolute mean OD570(optical density at 570 nm) of the three tissues of the negative control should reasonably be within the laboratory historical control data range.
- Acceptance criteria met for positive control: the positive control had a mean cell viability of 16% after 15 ± 0.5 minutes exposure. The mean relative tissue viability of the positive control should be <=50% relative to the negative control.
- Acceptance criteria met for variability between replicate measurements: The standard deviation value of the percentage viability of three tissues treated identically was less than 12%. The SD calculated from individual % tissue viabilities of the three identically treated replicates should be <=18.
Any other information on results incl. tables
Results obtained with test item, PC and NC
|
3 min endpoint |
1-hour endpoint |
Diff [%] |
Prediction |
|||||||||||||
Viability [%] |
Diff [%] |
CV [%] |
Viability [%] |
CV [%] |
QC |
||||||||||||
NC |
100.0 |
5.1 |
3.6 |
100.0 |
5.8 |
5.8 |
4.1 |
qualified |
Not classified |
||||||||
PC |
62.4 |
10.1 |
8.4 |
6.5 |
0.0 |
0.0 |
36.9 |
qualified |
Cat 1B/1C |
||||||||
TA |
93.2 |
7.4 |
7.7 |
65.0 |
3.4 |
3.4 | 0.0 |
qualified |
Not classified |
Diff – the difference between two identically treated tissues, CV – Coefficient of variation,QC – Quality criteria
NC – Negative control, PC – Positive Control, TA – Test article
Applicant's summary and conclusion
- Interpretation of results:
- other: does not require classification regarding the skin corrosivity.
- Conclusions:
- Based on the experimental data conducted according to the OECD TG 431, it can be concluded, that test item “Zinc chlorohydroxy sulphate and copper sulphide, precipitation” does not require classification regarding the skin corrosivity.
- Executive summary:
The purpose of the study was to evaluate the skin corrosion potential of “Zinc chlorohydroxy sulphate and copper sulphide, precipitation” in In Vitro Skin Corrosion Test utilising the Reconstructed Human Epidermis (RhE) Test Method (OECD TG 431).
The skin corrosion potential of “Zinc chlorohydroxy sulphate and copper sulphide, precipitation” was examined in the in vitro skin corrosion test using the reconstructed human epidermal model EpiDermTM. Two tissue replicates were used for each treatment (exposure times 3 min and 60 minutes). Concurrent positive (8N KOH) and negative (UP H2O) controls were used to ensure the adequate performance of the experimental model.
The Optical densities (ODs) of Negative controlt reated tissues were 2,630 at three min and 2,417 at 1 hour. The viability of the tissues exposed for 1 hour to the positive control (8N KOH) was 6.5%.The Positive and Negative controls met the acceptance criteria set by the OECD TG 431.
The viability of cultures treated by “Zinc chlorohydroxy sulphate and copper sulphide, precipitation” was 93.2 % after 3 min and 65.0% after 60 min. Since the material did not reduce MTT, nor it interacted with water, and was very easily removed from the tissue surface during the washing procedure, no additional steps were necessary to correct the result obtained on viable tissues in the main experiment
The Test Item is classified as non-corrosive on the basis of the 1-hour time-point.
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