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EC number: 273-527-9 | CAS number: 68988-45-4
- 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
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_toxicological-information.png)
Skin sensitisation
Administrative data
- Endpoint:
- skin sensitisation: in vivo (non-LLNA)
- Type of information:
- migrated information: read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Background irritation present
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 997
- Report date:
- 1997
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 406 (Skin Sensitisation)
- GLP compliance:
- yes
- Type of study:
- Buehler test
- Justification for non-LLNA method:
- A klimisch score 2 Buehler study already exists on teh test substance. Therefore, it was considered scientifically unjustified to re-run the same study according to the LLNA method.
Test material
- Reference substance name:
- Phosphorodithioic acid, mixed O,O-bis(1,3-dimethylbutyl and iso-Pr) esters, zinc salts
- EC Number:
- 283-392-8
- EC Name:
- Phosphorodithioic acid, mixed O,O-bis(1,3-dimethylbutyl and iso-Pr) esters, zinc salts
- Cas Number:
- 84605-29-8
- Molecular formula:
- Not applicable
- IUPAC Name:
- Phosphorodithioic acid, mixed O,O-bis(1,3-dimethylbutyl and iso-Pr) esters, zinc salts
Constituent 1
In vivo test system
Test animals
- Species:
- guinea pig
- Strain:
- Hartley
- Sex:
- male/female
- Details on test animals and environmental conditions:
- TEST ANIMALS
- Source: Harlan Sprague Dawley, Inc
- Age at study initiation: 6-11 weeks
- Weight at study initiation: 440-493 grams
- Housing: Housed individually in wire mesh suspension cages
- Diet (e.g. ad libitum): ad libitum
- Water (e.g. ad libitum): ad libitum
- Acclimation period: 7 days
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 17.8-26.1
- Humidity (%): 30-70%
- Air changes (per hr):
- Photoperiod (hrs dark / hrs light): 12 hours
IN-LIFE DATES: From: To:
Study design: in vivo (non-LLNA)
Inductionopen allclose all
- Route:
- epicutaneous, occlusive
- Vehicle:
- other: mineral oil
- Concentration / amount:
- Induction: 5% w/v
Challenge: 1% w/v
Challengeopen allclose all
- Route:
- epicutaneous, occlusive
- Vehicle:
- other: mineral oil
- Concentration / amount:
- Induction: 5% w/v
Challenge: 1% w/v
- No. of animals per dose:
- 20 treated with test material, 10 naive control
- Details on study design:
- RANGE FINDING TESTS:
Priary Irritation after 6 hour patch aplication of test material in mineral oil at following concentrations:
Undiluted, 50, 25, 10, 5, 2.5, 1, 0.5 % w/v
MAIN STUDY
A. INDUCTION EXPOSURE
- No. of exposures: 3
- Exposure period: 6 hours
- Test groups:
- Control group:
- Site: Left shoulder
- Frequency of applications: 6 to 7 days
- Duration:
- Concentrations: 5%
B. CHALLENGE EXPOSURE
- No. of exposures: 1
- Day(s) of challenge: 1 and 2 days (24 and 48 hours)
- Exposure period: 6 hours
- Test groups:
- Control group: 10 naive not previously exposed to test material
- Site:
- Concentrations: 1%
- Evaluation (hr after challenge): 24 and 48 hours
OTHER: - Challenge controls:
- 10 naive not previously exposed to test material
- Positive control substance(s):
- yes
- Remarks:
- 1-Chloro-2,4,-Dinitrobenzene
Results and discussion
- Positive control results:
- Postive for skin sensitization
In vivo (non-LLNA)
Resultsopen allclose all
- Reading:
- 1st reading
- Hours after challenge:
- 24
- Group:
- test chemical
- Dose level:
- 1%
- No. with + reactions:
- 3
- Total no. in group:
- 20
- Remarks on result:
- other: Reading: 1st reading. . Hours after challenge: 24.0. Group: test group. Dose level: 1%. No with. + reactions: 3.0. Total no. in groups: 20.0.
- Reading:
- 2nd reading
- Hours after challenge:
- 48
- Group:
- test chemical
- Dose level:
- 1%
- No. with + reactions:
- 0
- Total no. in group:
- 20
- Remarks on result:
- other: Reading: 2nd reading. . Hours after challenge: 48.0. Group: test group. Dose level: 1%. No with. + reactions: 0.0. Total no. in groups: 20.0.
- Reading:
- 1st reading
- Hours after challenge:
- 24
- Group:
- negative control
- Dose level:
- 1%
- No. with + reactions:
- 1
- Total no. in group:
- 10
- Remarks on result:
- other: Reading: 1st reading. . Hours after challenge: 24.0. Group: negative control. Dose level: 1%. No with. + reactions: 1.0. Total no. in groups: 10.0.
- Reading:
- 2nd reading
- Hours after challenge:
- 48
- Group:
- negative control
- Dose level:
- 1%
- No. with + reactions:
- 0
- Total no. in group:
- 10
- Remarks on result:
- other: Reading: 2nd reading. . Hours after challenge: 48.0. Group: negative control. Dose level: 1%. No with. + reactions: 0.0. Total no. in groups: 10.0.
- Group:
- positive control
- Remarks on result:
- not measured/tested
Any other information on results incl. tables
Justification for Read Across from Analogue EC 283-392-8
Common Manufacturing Process:The submission substance (EC 273-527-9) and the analogue (EC 283-392-8) are produced under a common manufacturing process in which a phosphorodithioic acid ester intermediate, (RO)2PS2H, is produced by the reaction of phosphorus pentasulfide with an alcohol or a mixture of two alcohols of a similar class - branched alcohol containing C8, C5 and C4 carbons (submission substance) and C3 and C6 carbons (analogue). The intermediate is neutralized with zinc oxide to produce the final multicomponent substance. The reaction is performed in the presence of a highly refined base oil which accounts for 8 – 10.3 % of the final products.
Impurities:The level of impurities in the submission substance and the analogue (data source) is minimal. Impurities have been identified as residual, unreacted alcohols from the production of the phosphorodithioic acid ester intermediates (isobutanol, pentanol and 2-ethylhexanol in the submission substance and isopropyl and 1,3-dimethylbutyl alcohols in the analogue).
Same Chemical Category:The submission substance (EC 273-527-9) and the analogue (EC 283-392-8), generically referred to as ZDDPs, have been shown to have sufficient structural similarities to be included in the Zinc Dialkydithiophosphate Category (ZDDPs) in the United States Environmental Protection Agency High Production Volume (HPV) Chemical Challenge Program.
Structural Similarity:The primary feature accounting for the similarity of the submission substance (EC 273-527-9) and the analogue (EC 283-392-8) is the common organometallic core structure consisting of a central zinc metal bonded to four alkyldithiophosphate esters (ligands) by coordinate covalent bonds -Zn[(S2P(OR)2]2.Structural variations between the submission substance and the analogue are related to the alkyl (R) groups of the alkyldithiophosphate ligands.
The analogue/data source (EC 283-392-8) is a multicomponent mixture of ZDDP monomers and dimers containing isopropyl dithiophosphate ligands, 1,3-dimethylbutyl dithiophosphate ligands and mixtures of isopropyl and 1,3-dimethylbutyl dithiophosphate ligands with a molecular weight range of 492 – 660 (monomer).
The submission substance (EC 273-527-9) is a multicomponent mixture of ZDDP monomers and dimers containing isobutyl dithiophosphate ligands, pentyl dithiophosphate ligands, 2-ethylhexyl dithiophosphates ligands and mixtures of isobutyl, pentyl and 2-ethylhexyl dithiophosphate ligands with a molecular weight range of 548 – 772 (monomer).
Tanimoto Fingerprint (ToxMatch Version 1.06 software) gives a similarity index greater than 0.8 (values range from 0, no similarity to 1, identical). Peer reviewed literature indicates that values greater than 0.6 are significantly similar.DSSTox similarity was 80% between the submission substance and the analogue.
Applicant's summary and conclusion
- Interpretation of results:
- not sensitising
- Remarks:
- Migrated information
- Conclusions:
- The irritation in 3/20 animals in the challenge phase scored after 24 hours did not persist to 48 hours, indicating an irritation response rather than a skin sensitization response.
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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