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EC number: 201-622-7 | CAS number: 85-68-7
- 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
Genetic toxicity: in vivo
Administrative data
- Endpoint:
- in vivo mammalian somatic cell study: cytogenicity / bone marrow chromosome aberration
- Remarks:
- Type of genotoxicity: chromosome aberration
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- According to the NTP website the start dates for the three studies were 31 August 1987, 17 December 1987 and 22 August 1988
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Little data on methods used or on animal husbandry. Full results on types of aberrations detected not reported; the mitotic index was not determined as an indicator of toxicity to the bone marrow cells.
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:
- EPA OPPTS 870.5385 (In Vivo Mammalian Cytogenetics Tests: Bone Marrow Chromosomal Analysis)
- Deviations:
- yes
- Remarks:
- cytotoxicity not determined; only 50 metaphases examined per animal
- GLP compliance:
- not specified
- Type of assay:
- chromosome aberration assay
Test material
- Reference substance name:
- Benzyl butyl phthalate
- EC Number:
- 201-622-7
- EC Name:
- Benzyl butyl phthalate
- Cas Number:
- 85-68-7
- Molecular formula:
- C19H20O4
- IUPAC Name:
- 1-benzyl 2-butyl benzene-1,2-dicarboxylate
- Details on test material:
- - Name of test material (as cited in study report): butyl benzylphthalate
- Physical state: solid
- Analytical purity: no data
- Impurities (identity and concentrations): no data
- Composition of test material, percentage of components:
- Isomers composition: no data
- Purity test date: no data
- Lot/batch No.: no data
- Expiration date of the lot/batch: no data
- Stability under test conditions: no data
- Storage condition of test material: no data
- Other:
Constituent 1
Test animals
- Species:
- mouse
- Strain:
- B6C3F1
- Sex:
- male
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: no data
- Age at study initiation: no data
- Weight at study initiation: no data
- Assigned to test groups randomly: [no/yes, under following basis: ] no data
- Fasting period before study: no data
- Housing: no data
- Diet (e.g. ad libitum): no data
- Water (e.g. ad libitum): no data
- Acclimation period: no data
ENVIRONMENTAL CONDITIONS
- Temperature (°C): no data
- Humidity (%): no data
- Air changes (per hr): no data
- Photoperiod (hrs dark / hrs light): no data
IN-LIFE DATES: From: To:
Administration / exposure
- Route of administration:
- intraperitoneal
- Vehicle:
- - Vehicle(s)/solvent(s) used: corn oil
- Justification for choice of solvent/vehicle: no data
- Concentration of test material in vehicle: no data
- Lot/batch no. (if required): no data
- Purity: no data - Details on exposure:
- intraperitoneal injection of 0.4 ml
- Duration of treatment / exposure:
- single injection
- Frequency of treatment:
- single injection
- Post exposure period:
- 17 hr (2 studies); 36 hr (1 study)
Doses / concentrationsopen allclose all
- Remarks:
- Doses / Concentrations:
0, 1250, 2500, or 5000 mg/kg bw
Basis:
nominal conc.
Study 1: 36 hr sampling time
- Remarks:
- Doses / Concentrations:
0, 1250, 2500, or 5000 mg/kg bw
Basis:
nominal conc.
Study 2: 17 hr sampling time
- Remarks:
- Doses / Concentrations:
0, 2500, 3750 or 5000 mg/kg bw
Basis:
nominal conc.
Study 3: 17 hr sampling time
- No. of animals per sex per dose:
- 8 males per dose
- Positive control(s):
- dimethylbenzanthracene
- Justification for choice of positive control(s): no data
- Route of administration: not specified but presumably i.p.
- Doses / concentrations:100 mg/kg bw
Examinations
- Tissues and cell types examined:
- bone marrow cells
- Details of tissue and slide preparation:
- CRITERIA FOR DOSE SELECTION: based on available information on LD50 values. Highest dose "limited by experimental design" to 5000 mg/kg bw
TREATMENT AND SAMPLING TIMES ( in addition to information in specific fields): for the 17 hr sampling time the mice were implanted subcutaneously with a bromodeoxyuridine tablet 1 hr before exposure to BBP (to allow selection of cells in the first metaphase following treatment for scoring). Mice sampled at 36 hr were implanted subcutaneously with a bromodeoxyuridine tablet 18 hr after exposure to BBP. The mice received an i.p. injection of colchicine 2 hrs before sacrifice.
DETAILS OF SLIDE PREPARATION: Bone marrow cells were flushed from the femurs with phosphate-buffered saline, treated with a hypotonic salt solution, fixed and dropped onto chilled slides. After drying in air for 24 hr, the slides were stained.
METHOD OF ANALYSIS: 50 first-division metaphases were scored from each of the eight animals for all types of aberrations. The mean number of cells with aberrations (excluding gaps) and the mean total aberrations were determined for each treatment group.
OTHER: - Statistics:
- The values for the percentage of cells with aberrations were analysed by a one-tailed trend test, and the significance was set at P=0.025
Results and discussion
Test resultsopen allclose all
- Sex:
- male
- Genotoxicity:
- positive
- Remarks:
- 17 hr sampling time; at 5000 mg/kg bw only (2 studies)
- Toxicity:
- not specified
- Vehicle controls validity:
- valid
- Negative controls validity:
- not applicable
- Positive controls validity:
- valid
- Sex:
- male
- Genotoxicity:
- negative
- Remarks:
- 36 hr sampling time (1 study)
- Toxicity:
- not specified
- Vehicle controls validity:
- valid
- Negative controls validity:
- not applicable
- Positive controls validity:
- valid
- Additional information on results:
- RESULTS OF RANGE-FINDING STUDY: not carried out
RESULTS OF DEFINITIVE STUDY
- Types of structural aberrations for significant dose levels (for Cytogenetic or SCE assay): not given in report
- Appropriateness of dose levels and route: appropriate, single i.p. injection
- Statistical evaluation: significant (P=0.003) at 5000 mg/kg bw dose at 17hr sampling time in both studies (studies 2 and 3).
Any other information on results incl. tables
Butyl benzyl phthalate gave a weak positive result at a dose of 5000 mg/kg bw when sampled at 17 hr post treatment only. Trend analysis was also positive in studies 2 and 3 (p=0.003)
Study 1 (36 hr sampling) |
Study 2 (17 hr sampling) |
Study 3 (17 hr sampling) |
||||
Dose (mg/kg bw) |
% cells with aberrations |
Dose (mg/kg bw) |
% cells with aberrations |
Dose (mg/kg bw) |
% cells with aberrations |
|
Corn oil | 0.25 | 0.75 | 1.00 | |||
DMBA | 100 | 26.75 | 100 | 11.50 | 100 | 14.00 |
BBP | 1250 | 1.50 | 1250 | 1.50 | 2500 | 2.25 |
2500 | 0.25 | 2500 | 0.75 | 3750 | 2.00 | |
5000 | 0.50 | 5000 | 3.25* | 5000 | 4.25* |
* P=0.006
Applicant's summary and conclusion
- Conclusions:
- Interpretation of results (migrated information): other: weak positive
In an in vivo assay for chromosome aberrations in which mice were treated by a single intraperitoneal injection, butyl benzyl phthalate showed a weak positive response in the bone marrow at the top dose of 5000 mg/kg bw. - Executive summary:
Butyl benzyl phthalate was assessed for its ability to induce chromosome aberrations in the bone marrow cells of mice.
In two separate studies, groups of eight male mice were injected intraperitoneally with either 0, 1250, 2500 or 5000 mg/kg bw of the test compound, another group received dimethylbenzanthracene (positive control) and cells were harvested at either 17 or 36 hr after treatment. In a further study mice were dosed with 0, 2500, 3750 or 5000 mg/kg bw and cells were harvested at 17 hr. The mice were subcutaneously implanted with a bromodeoxyuridine tablet 18 hr before harvesting, and injected with colchicine 2 hr before harvesting of the cells. Bone marrow cells were collected from the femurs of each animal, washed, fixed and spread on slides before staining. Fifty first-division metaphases from each animal were scored for all types of chromosome aberrations. The mean number of aberrations and the mean percentage of cells containing aberrations (excluding gaps) were determined for each treatment group. The mitotic index was not determined as an indicator of cytotoxicity.
In both studies in which cells were harvested at 17 hr post treatment, a weak (but statistically significant) increase in aberrations was seen only at 5000 mg/kg bw. There was no such increase at the delayed 36-hr sampling time.
In an in vivo assay for chromosome aberrations in which mice were treated by a single intraperitoneal injection, butyl benzyl phthalate showed a weak positive response in the bone marrow at the top dose of 5000 mg/kg bw.
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