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EC number: 204-798-3 | CAS number: 126-71-6
- 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
Endpoint summary
Administrative data
Description of key information
In a GLP-compliant Buehler-Test according to OECD Guideline 406 in guinea pigs Triisobutyl phosphate was sensitising.
Key value for chemical safety assessment
Skin sensitisation
Link to relevant study records
- Endpoint:
- skin sensitisation: in vivo (non-LLNA)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 406 (Skin Sensitisation)
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.6 (Skin Sensitisation)
- Qualifier:
- according to guideline
- Guideline:
- EPA OPP 81-6 (Skin Sensitisation)
- GLP compliance:
- yes
- Type of study:
- Buehler test
- Justification for non-LLNA method:
- study was conducted before implementation of LLNA
- Specific details on test material used for the study:
- - Name of test material: Etingal
- Physical state: liquid, achromatic
- Lot/batch No.: MG-94-37
- Storage condition of test material: room temperature
- Substance number: 94/261 - Species:
- guinea pig
- Strain:
- other: Pirbright White, Dunkin Hartley Crl: (HA)BR (SPF)
- Sex:
- female
- Details on test animals and environmental conditions:
- TEST ANIMALS
- Source: Charles River GmbH - Wiga, Sulzfeld, FRG
- Age at study initiation: Young adult animals
- Weight at study initiation: 313 - 388 g
- Housing: No. of animals per cage: 5. Type of cage: Makrolon, type IV. Bedding: Granulat Typ 3/4 (staubfrei); SSNIFF
- Diet (ad libitum): Kliba Labordiät 341 (Kaninchen- Meerschweinchen-Haltungsdiät)
- Water (ad libitum): tap water; about 2 g of ascorbic acid per 10 l water was added to the drinking water twice a week
- Acclimation period: 8 days before the beginning of the study in the laboratory for dermal toxicity
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 20 - 24°C
- Humidity (%): 30 - 70% .
- Air changes (per hr): not specified
- Photoperiod (hrs dark / hrs light): 12h light (6.00 a.m. - 6.00 p.m.) 12 h darkness (6.00 p.m. - 6.00 a.m.)
IN-LIFE DATES:
Not specified - Route:
- epicutaneous, occlusive
- Vehicle:
- other: olive oil
- Concentration / amount:
- 75 % / 0.5 mL
- Day(s)/duration:
- 3 times (once per week) for 6 hours, respectively
- Route:
- epicutaneous, occlusive
- Vehicle:
- other: olive oil
- Concentration / amount:
- 50 % / 0.5 mL
- Day(s)/duration:
- 6 hours
- No. of animals per dose:
- Pretest: 4
Main test;
- control group: 10
- test group: 20 - Details on study design:
- 2 x 2 cm gauze patches were applied to the skin of the flanks under an occlusive dressing (the bandage consists of rubberized linenpatches 4 x 4 cm
from Russka, test patch of Idealbinde 5 x 5 cm from Pfälzische Verbandstoff-Fabrik, and Fixomull® Stretch (adhesive fleece) from Beiersdorf AG). 0.5 mL of the test substance or test substance preparations were exposed to the animals.
RANGE FINDING TESTS:
Duration of exposure: 6 hours
Site of application: right and left flank
Application frequency: 2 times (one application per week) on the same application area
Number of test animals: 4 per test concentration
Readings: 24 and 48 h after the removal of the patch
Assessment of skin findings: according to Draize, J.H. (1959)
MAIN STUDY
A. INDUCTION EXPOSURE
- Exposure period: 6 hours
- Test groups: 20 animals
- Control group: 10 animals
- Site: anterior left flank
- Frequency of applications: 3 times (one application per week; days 0, 7 and 14) on the same application area
- Concentrations: 75%
B. CHALLENGE EXPOSURE
- Day(s) of challenge: 14 days after the third induction
- Exposure period: 6 hours
- Test groups: 20 animals
- Control group: 10 animals
- Site: Substance formulation: anterior right flank. Vehicle: posterior right flank
- Concentrations: 50%
- Evaluation (hr after challenge): 24 and 48 h after the removal of the patch - Challenge controls:
- Treatment of the test group and of control group 1 with the test substance formulation. Additionally olive oil DAB 10 was applied as a vehicle. Control group 2 only received olive oil DAB 10.
- Positive control substance(s):
- yes
- Remarks:
- alpha-hexylcinnamaldehyde
- Positive control results:
- The positive control showed that the test system was able to detect sensitizing compounds under laboratory conditions chosen.
- Key result
- Reading:
- 1st reading
- Hours after challenge:
- 24
- Group:
- test chemical
- Dose level:
- 0.5 ml
- No. with + reactions:
- 9
- Total no. in group:
- 18
- Clinical observations:
- very slight erythema
- Remarks on result:
- other:
- Reading:
- 1st reading
- Hours after challenge:
- 24
- Group:
- negative control
- No. with + reactions:
- 0
- Total no. in group:
- 10
- Remarks on result:
- no indication of skin sensitisation
- Reading:
- 1st reading
- Hours after challenge:
- 24
- Group:
- positive control
- Dose level:
- undiluted
- No. with + reactions:
- 4
- Total no. in group:
- 20
- Remarks on result:
- positive indication of skin sensitisation
- Remarks:
- No concurrent positive control group. Separate studies were performed twice a year in the laboratory. The results of the latest study are reported.
Reference
Endpoint conclusion
- Endpoint conclusion:
- adverse effect observed (sensitising)
- Additional information:
In the key study, Triisobutyl phosphate was tested for its sensitizing effect on the skin of the guinea pig in the Beuhler test according to OECD guideline 406 (BASF, 1989).
After the 1st, 2nd or 3rd induction with 75% test substance preparations very slight to well-defined signs of irritation could be observed in test group animals.
The challenge with a 50% test substance preparation caused very slight to well-defined skin reactions in test group animals.
Macroscopic examination revealed that the cause of death in two animals was not substance-related.
Based on the results of the study under the test conditions chosen and applying the evaluation criteria it was concluded that Triisobutyl phosphate has a sensitizing effect on the skin of the guinea pig in the Buehler Test.
Supportingly, Triisobutyl phosphate was tested in a Guinea pig maximisation test (Hoechst, 1989). Intradermal induction was carried out with 0.05% w/w Triisobutyl phosphate in paraffin DAB, while for dermal induction and dermal challenge, 4% w/wTriisobutyl phosphate in white Vaseline DAB was used. The challenge resulted in a reaction in 9 of the 10 animals. Furthermore, Triisobutyl phosphate was tested in guinea pigs (Eastman Kodak, 1986). The observed score at the 48 hours reading was 2.5.
Additionally, an in vitro skin sensitization test battery was conducted (BASF, 2013). The test substance has been assessed in vitro methods addressing major steps of the sensitization process. The test evaluation of the Direct Peptide Reactivity Assay (DPRA, addresses peptide binding potential), the LuSens Assay (addresses the keratinocyte activation potential) and the Myeloid U937 Skin Sensitization Test (MUSST, addresses dendritic cell line activation potential) was negative. An additional in vitro skin sensitization test, the human cell line activation test (h-CLAT, addresses dendritic cell line activation potential), showed positive results. In conclusion, the test substance is not predicted to be a skin sensitizer in the in vitro skin sensitization test battery. However, because of the positive results observed in animal studies, the test substance is considered to be a skin sensitizer.
Respiratory sensitisation
Endpoint conclusion
- Endpoint conclusion:
- no study available
Justification for classification or non-classification
Classification, Labelling, and Packaging Regulation (EC) No. 1272/2008
The available experimental test data are reliable and suitable for classification purposes under Regulation 1272/2008. Based on the effects as observed in the Buehler test, the substance is considered to be classified as a skin sensitizer (Cat. 1B) under Regulation (EC) No. 1272/2008, as amended for the tenth time in Regulation (EC) No. 2017/776.
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