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EC number: 237-158-7 | CAS number: 13674-84-5
- 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://chesar.echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_toxicological-information.png)
Basic toxicokinetics
Administrative data
- Endpoint:
- basic toxicokinetics
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Acceptable, well-documented publication which meets basic scientific principles.
Data source
Reference
- Reference Type:
- publication
- Title:
- Comparative studies on Absorption,Distribution,and Excretion of Flame Retardants Halogenated Alkyl Phophate in Rats.
- Author:
- Minegishi K, Kurebayashi H, Nambaru S, Morimoto K, Takahashi T & Yamaha T
- Year:
- 1 988
- Bibliographic source:
- EISEI KAGAKU. 34(2): 102-114
Materials and methods
- Objective of study:
- absorption
- distribution
- excretion
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EPA OPPTS 870.8223 (Pharmacokinetic Test)
- Deviations:
- not specified
- GLP compliance:
- not specified
Test material
- Reference substance name:
- Tris(2-chloro-1-methylethyl) phosphate
- EC Number:
- 237-158-7
- EC Name:
- Tris(2-chloro-1-methylethyl) phosphate
- Cas Number:
- 13674-84-5
- Molecular formula:
- C9H18Cl3O4P
- IUPAC Name:
- tris(2-chloro-1-methylethyl) phosphate
- Details on test material:
- - Radiochemical purity: >99% (ascertained by GC)
- Specific activity: 0.213 mCi/mmol
- Other: The test material was obtained from Daihachi Chemicals Indust.,Ltd.
Constituent 1
- Radiolabelling:
- yes
- Remarks:
- C14 labeled
Test animals
- Species:
- rat
- Strain:
- Wistar
- Sex:
- male
- Details on test animals or test system and environmental conditions:
- The 5-week-old rats weighing 150±5g were obtained from Nippon BioSupp.Center(Tokyo,Japan). Animals were kept in an environment-controlled room maintained at 22-25 centidegree and 60-70% relative humidity and artificially illuminated for 12h/d. The animals were maintained on a standard diet (MF,Oriental YEAST Co.,Ltd.) and tap water ad libitum before use. After observation of general appearance and behavior for a week, the animals were given orally dose.Each animal was housed in an alumite metabolism cage (Nihon Clea or Okazaki Sangyo Co., Ltd., Japan) to collect the urine and feces every 24h of 168h.
Administration / exposure
- Route of administration:
- oral: unspecified
- Vehicle:
- olive oil
- Duration and frequency of treatment / exposure:
- 168 hours after single application
Doses / concentrations
- Remarks:
- Doses / Concentrations:
50 μmol/kg (16.38 mg/kg)
- No. of animals per sex per dose / concentration:
- 5
- Control animals:
- not specified
- Positive control reference chemical:
- not applicable
- Details on study design:
- no data
- Details on dosing and sampling:
- PHARMACOKINETIC STUDY (Absorption, distribution, excretion)
- Tissues and body fluids sampled : urine, faeces, blood, plasma, serum or other tissues, cage washes, bile
- Time and frequency of sampling: Urine and faeces were collected every 24 hours for 7 days. Expired 14CO2 was determined after 72 and 96 hours. Bile was collected via cannulation every 2 hours for the first 30 hours following administration, from 30 – 46 hours and from 46 – 48 hours. Tissue samples were taken at 3, 6, 12, 24, 72 and 168 hours. Tissue radioactivity was analysed by oxidation followed by LSC and also by GC. - Statistics:
- Statistical analyses of the data were carried out as reported. Analyses of distributions and recoveries of 14C-TCPP were evaluated by using Bartlett's test for homogeneity of variance, analysis of variance (ANOVA) (or Kruskal Wallis' nonparametric ANOVA when the variances were not homogeneneos), and Scheffe's multiple comparison test (or Scheffe's type mean rank test for Kruskal-Wallis'ANOVA) was used. All paired comparisons were made using Sheffe's multiple comparison test.
Results and discussion
- Preliminary studies:
- no data
Toxicokinetic / pharmacokinetic studies
- Details on absorption:
- The absorption rate is about 77% via oral route and details displayed in table 1.
Absorption was calculated from the radioisotopic measurements of cumulative urinary excretion and cumulative exhalation (performed for 3 or 4 d post-administration), and the amount in blood and tissues of rats sacrificed at 3, 6, 12, 24, 72, and 168 hr following administration.
Absorption of radiolabeled TCPP was rapid; radiolabel was detected throughout the body as early as 3 hr post-administration. At 168 hr, 75.6% of the administered oral dose had been excreted in the urine and expired air, or remained in the carcass. Another 22% was excreted in the feces; however, TCPP undergoes enterohepatic circulation (see Excretion section), and it is not clear if this proportion includes unabsorbed TCPP, TCPP excreted in the bile, or both. Therefore, at least 75.6% is absorbed following oral administration to rats. - Details on distribution in tissues:
- The distribution rate was determined by the average time at which the TCPP reached the maximum concentrations in various tissues and details displayed in table 2.
The concentrations of the radiolabel in blood, heart, spleen, brain, testis, adipose tissue, and muscle were all <4 nmol/g tissue. The radiolabel concentration remained highest in the liver during subsequent timepoints up to d 7. Radiolabel reached its maximum concentration in various tissues 3–6 hr after administration.
Transfer into organs
- Transfer type:
- blood/brain barrier
- Observation:
- slight transfer
- Remarks:
- 0.18+-0.03% after 168 h
- Details on excretion:
- Approximately 97% of radiolabeled TCPP (67% in urine, 22% in feces, and 7.7% in expired air) was excreted within 7 days of administration in rats. Only 0.7% of the administered dose was recovered in the carcass after 168 hr, and approximately 2.5% was not recovered. Removal of TCPP from the tissues followed a biphasic pattern. Excretion was fairly rapid from all compartments (t1/2=5.2–13.5) for the first 24 hr. During the subsequent 6 d, tissue half-lives ranged from 45 hr in the liver to 103.4 hr in adipose tissue.
Biliary radioactivity peaked within 2 hr of administration, and after 48 hr, biliary excretion represented approximately 45% of the administered dose. The ratio of biliary excretion to fecal excretion was calculated to be 2.23, suggesting to the authors that TCPP is subject to enterohepatic circulation.
Toxicokinetic parametersopen allclose all
- Test no.:
- #1
- Toxicokinetic parameters:
- half-life 1st: 16.46 in Adipose tissue
- Test no.:
- #2
- Toxicokinetic parameters:
- half-life 2nd: 103.43 in Adipose tissue
Metabolite characterisation studies
- Metabolites identified:
- not measured
- Details on metabolites:
- The metabolic transformation of TCPP has not been investigated.
Any other information on results incl. tables
Table 1 Recovery of 14C-Radioactivity from Urine, Feces and Expired Air of Rats at 168h after Oral Administration of 14C-flame Retardants
Dose % recovered | |
Urine f) | 67.17±2.66*b,×c,×e |
Feces f) | 22.17±1.17 |
Expired air g) | 7.72±0.84×a-c |
Carcass f,h) | 0.7±0.08*a |
Total | 97.76 |
Each flame retardant was orally administered to rats at a dose of 50 µmol/kg. Mean values are given ±S.E.
*The difference is significant, 0.01<p<0.05
×The difference is highly significant, p<0.01
a-e Superscripts show mutual differences
f five animals were used
g Three animals were used
Table 2 The Distribution of 14C-Radioactivity in the Blood and Tissues of Rats after Oral Administration of 14C-Flame Retardants
Concentration(nmol/g of tissue) | ||||||
3h | 6h | 12h | 24h | 72h | 168h | |
Tissues | ||||||
Blood | 3.51±0.16 | 4.62±0.19 | 2.05±0.11*a | 1.46±0.12*a | 0.74±0.13*a | 0.26±0.04×a,*b |
Heart | 3.97±0.86*b | 4.41±0.10 | 1.81±0.15*a | 1.36±0.05*a | 0.72±0.03*a | 0.22±0.04*b |
Lung | 9.37±1.51*c | 10.87±0.50×c | 7.17±0.32×a,*b,*c | 2.60±0.19*a | 1.49±0.29×a | 0.59±0.06*a,*b |
Liver | 28.64±4.38*c | 31.46±1.74×c | 13.69±1.43×a-c | 8.00±0.56 | 3.30±0.86 | 1.15±0.26×b |
Kideny | 27.26±7.48 | 23.25±4.56*e | 9.17±0.81×a,×b,*c | 4.16±0.08*a | 1.57±0.05 | 0.82±0.11*a,*b |
Spleen | 2.83±0.31*b,*e | 4.13±0.68*e | 2.20±0.18×a,×c | 1.35±0.04*a | 0.68±0.02 | 0.26±0.03*a,×b |
Brain | 1.2±0.14*e | 2.16±0.40*c,×e | 0.89±0.06×a,×c,×e | 0.74±0.01 | 0.41±0.02 | 0.18±0.03×a-c |
Testis | 2.00±0.20 | 2.87±0.26 | 1.13±0.12 | 0.98±0.04*a | 0.58±0.03 | 0.26±0.02×a,×b |
Adipose | 2.85±0.70 | 3.37±0.17*c,×e | 2.10±0.11 | 1.51±0.04 | 0.95±0.02 | 0.54±0.03 |
Muscle | 1.84±0.18 | 2.65±0.15*b,*c | 1.74±0.16*a | 1.02±0.03×a,×b | 0.66±0.06 | 0.35±0.03 |
Each flame retardant was orally administered to rats at a dose of 50 µmol/kg. Mean values are given ±S.E.
*The difference is significant, 0.01<p<0.05
×The difference is highly significant, p<0.01
a-e Superscripts show mutual differences
f five animals were used
g Three animals were used
Table 3 The biological half life of 14C-Radioactivity in the Blood and Tissues of Rats after Oral Administration of 14C-Flame Retardants
Tissues | ||
1 st phase b | 2 nd phase c | |
Blood | 11.67 | 58.73 |
Heart | 11.23 | 53.72 |
Lung | 8.65 | 67.94 |
Liver | 9.68 | 45.89 |
Kideny | 7.67 | 58.73 |
Spleen | 11.93 | 61.33 |
Brain | 13.48 | 70.00 |
Testis | 5.17 | 74.52 |
Adipose | 16.46 | 103.43 |
Muscle | 13.38 | 94.93 |
b) Calculated from the data of 6, 12 and 24 h after dosing
c) Calculated from the data of 24, 72 and 168 h after dosing
Applicant's summary and conclusion
- Conclusions:
- Interpretation of results (migrated information): no bioaccumulation potential based on study results
The concentration of radioactivity was low implying no bioaccumulation. - Executive summary:
In the comparative study on absorption, distribution, and excretion of flame retardants halogenated alkyl phosphate in rats, 5 rats were orally administered a single dose of 50 µmol/kg (16.38 mg/kg) 14C-TCPP (purity 99%; specific activity 0.213 mCi/mmol) in olive oil. Urine and faeces were collected every 24 hours for 7 days. Expired 14CO2 was determined after 72 and 96 hours. Bile was collected via cannulation every 2 hours for the first 30 hours following administration, from 30 – 46 hours and from 46 – 48 hours. Tissue samples were taken at 3, 6, 12, 24, 72 and 168 hours. Tissue radioactivity was analysed by oxidation followed by LSC and also by GC.
The recovery of radioactivity after 7 days was urine (67.2%), faeces (22.2%), expired air (7.7%) and carcass (0.7%) (total recovery was 97.8%). Seven days after oral administration of TCPP, the tissue distribution of radioactivity was, in order of decreasing concentration, liver, kidney, lung, fat, muscle, gonads, spleen, blood, heart and brain. Approximately 45% of administered radioactivity was excreted via the bile in 48 hours. This excretion was quite rapid, with approximately 30% being excreted after 3 hours. The average Tmax value for TCPP radioactivity in tissues was 5.7 hours. Tissue/blood ratios calculated at various intervals over 7 days were > 1 for liver, kidney and lung and from 12 hours in adipose tissue indicating incorporation of radioactivity into these tissues. The decrease in radioactivity in all tissues was biphasic. The longest t½ was recorded in adipose tissue in both phases of elimination (16.5 hours and 103.4 hours, respectively). However, the concentration of radioactivity was low implying no bioaccumulation. The biliary/faecal excretion ratio was 2.23 at 48 hours indicating enterohepatic re-circulation from the GI tract.
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