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EC number: 234-324-0 | CAS number: 11099-06-2
- 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
Repeated dose toxicity: oral
Administrative data
- Endpoint:
- repeated dose toxicity: oral, other
- Remarks:
- Combined Repeated Dose Toxicity Study with the Reproduction / Developmental Toxicity Screening Test
- Type of information:
- experimental study
- Adequacy of study:
- weight of evidence
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- secondary literature
- Justification for type of information:
- Data from secondary source
Data source
Reference
- Reference Type:
- other: Secondary source
- Title:
- Subchronic toxicity study of test chemical was performed in rats
- Author:
- OECD SIDS
- Year:
- 2 008
- Bibliographic source:
- OECD HPV Chemical Programme, SIDS Dossier,2008
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 422 (Combined Repeated Dose Toxicity Study with the Reproduction / Developmental Toxicity Screening Test)
- Principles of method if other than guideline:
- Subchronic toxicity study of test chemical was performed in rats
- GLP compliance:
- not specified
- Limit test:
- no
Test material
- Reference substance name:
- Tetraethyl orthosilicate
- EC Number:
- 201-083-8
- EC Name:
- Tetraethyl orthosilicate
- Cas Number:
- 78-10-4
- Molecular formula:
- C8H20O4Si
- IUPAC Name:
- Tetraethyl silicate
- Details on test material:
- - IUPAC Name - Tetraethyl orthosilicate
- InChI - 1S/C8H20O4Si/c1-5-9-13(10-6-2,11-7-3)12-8-4/h5-8H2,1-4H3
- Smiles - [Si](OCC)(OCC)(OCC)OCC
- Molecular formula :C8H20O4Si
- Molecular weight :208.328 g/mole
- Substance type:Organ metallic
- Physical state:liquid
Constituent 1
Test animals
- Species:
- rat
- Strain:
- Sprague-Dawley
- Details on species / strain selection:
- No data available
- Sex:
- male/female
- Details on test animals or test system and environmental conditions:
- No data available
Administration / exposure
- Route of administration:
- oral: gavage
- Details on route of administration:
- No data available
- Vehicle:
- corn oil
- Details on oral exposure:
- Details on exposure
PREPARATION OF DOSING SOLUTIONS:
Test chemical dissolved in corn oil.
DIET PREPARATION
- Rate of preparation of diet (frequency):
- Mixing appropriate amounts with (Type of food):
- Storage temperature of food:
VEHICLE
- Justification for use and choice of vehicle (if other than water): Test chemical dissolved in corn oil.
- Concentration in vehicle: 0,10, 50 and 100 mg/kg bw/day - Analytical verification of doses or concentrations:
- not specified
- Duration of treatment / exposure:
- 28 days in males; up to 53 days in females
- Frequency of treatment:
- Daily
Doses / concentrations
- Remarks:
- 0,10, 50 and 100 mg/kg bw/day
- No. of animals per sex per dose:
- Total :80
0 mg/kg /day: 10males and 10 females
10 mg/kg /day: 10males and 10 females
50mg/kg /day:10males and 10 females
100 mg/kg /day:10males and 10 females - Control animals:
- yes, concurrent vehicle
- Details on study design:
- No data available
- Positive control:
- No data available
Examinations
- Observations and examinations performed and frequency:
- Parental animals observation and examinations
CAGE SIDE OBSERVATIONS: Yes
- Time schedule:
- Cage side observations checked in table [No.?] were included.
DETAILED CLINICAL OBSERVATIONS: Yes / No / No data
- Time schedule:
BODY WEIGHT: Yes
- Time schedule for examinations: Body weight were recorded at designated intervals
FOOD CONSUMPTION AND COMPOUND INTAKE (if feeding study): food consumption were recorded at
designated intervals
- Food consumption for each animal determined and mean daily diet consumption calculated as g food/kg body weight/day: Yes / No / No data
- Compound intake calculated as time-weighted averages from the consumption and body weight gain data: Yes / No / No data
WATER CONSUMPTION AND COMPOUND INTAKE (if drinking water study): Yes / No / No data
- Time schedule for examinations:
OTHER:
Detailed clinical observations and
neurobehavioral tests were conducted at designated intervals to assess behavior, main functions and reflexes (landing foot splay, rectal temperature and forelimb grip strength) and to measure motor activity over a 1- and 10-minute periods. Blood samples were collected from all males of the
principal groups and from all females of the toxicity groups at the end of the treatment period. - Sacrifice and pathology:
- At final sacrifice of the parents, specified organs were weighed and a complete macroscopic post-mortem examination was performed. A microscopic examination was performed on a range of sampled tissue and organs for all males of the principal groups and females of the toxicity groups; a microscopic examination was not performed on the principal group females.
- Statistics:
- No data available
Results and discussion
Results of examinations
- Clinical signs:
- not specified
- Mortality:
- not specified
- Body weight and weight changes:
- effects observed, treatment-related
- Description (incidence and severity):
- Induced a transient decrease in body weight gain during lactation at 100 mg/kg/day. Slight transient decrease in body weight gain was also noted in females of the toxicity group at 100 mg/kg/day but no change in body weight was noted in males of the principal group at any dose-level
- Food consumption and compound intake (if feeding study):
- not specified
- Food efficiency:
- not specified
- Water consumption and compound intake (if drinking water study):
- not specified
- Ophthalmological findings:
- not specified
- Haematological findings:
- not specified
- Clinical biochemistry findings:
- effects observed, treatment-related
- Description (incidence and severity):
- slightly lower sodium, potassium and glucose levels in males given 100 mg/kg/day,
- Urinalysis findings:
- not specified
- Behaviour (functional findings):
- not specified
- Immunological findings:
- not specified
- Organ weight findings including organ / body weight ratios:
- not specified
- Gross pathological findings:
- not specified
- Neuropathological findings:
- not specified
- Histopathological findings: non-neoplastic:
- effects observed, treatment-related
- Description (incidence and severity):
- Tubular nephropathy was observed among some treated males (principal group) at 50 and 100 mg/kg/day and females (toxicity group) at 100 mg/kg/day. This was associated with slightly lower plasma levels of sodium, potassium and glucose. No signs of substance-induced maternal or paternal toxicity occurred at the low dose-level (10 mg/kg/day).
- Histopathological findings: neoplastic:
- not specified
- Other effects:
- not specified
Effect levels
open allclose all
- Dose descriptor:
- NOAEL
- Effect level:
- 50 mg/kg bw/day (nominal)
- Based on:
- test mat.
- Sex:
- female
- Basis for effect level:
- body weight and weight gain
- clinical signs
- gross pathology
- histopathology: non-neoplastic
- mortality
- Remarks on result:
- other: No toxic effects were observed
- Dose descriptor:
- NOAEL
- Effect level:
- 10 mg/kg bw/day (nominal)
- Based on:
- test mat.
- Sex:
- male
- Basis for effect level:
- body weight and weight gain
- gross pathology
- histopathology: non-neoplastic
- organ weights and organ / body weight ratios
- Remarks on result:
- other: No toxic effects were observed
Target system / organ toxicity
- Critical effects observed:
- not specified
- System:
- other: not specified
- Organ:
- not specified
Applicant's summary and conclusion
- Conclusions:
- No Observed Adverse Effect Level (NOAEL) for parental toxicity was considered to be 50 mg/kg/day for the females and 10 mg/kg/day for the males
- Executive summary:
The combined repeated reprductive and developmental toxicity study of test chemical was performed on male and female Sprague-Dawley rats. The test chemical was dissolved in corn oil and administered via oral gavage route throughout the pre-mating period (15 days), during the mating and post-mating periods until final sacrifice for the males (at least 4 weeks in total)and throughout pre-mating (15 days) and mating period, during pregnancy and lactation, until day 4 post-partum inclusive (or until sacrifice for un-mated females) for the females. Three groups of 10 males and 10 females received the test chemical by oral gavage once a day at 10, 50 or 100 mg/kg/day while A group of 10 males and 10 females was given the vehicle (corn oil) under the same experimental conditions and acted as a control group.
Mortality and clinical signs were checked daily in all animals. Body weight and food consumption were recorded at designated intervals. Detailed clinical observations and neurobehavioral tests were conducted at designated intervals to assess behavior, main functions and reflexes (landing
foot splay, rectal temperature and forelimb grip strength) and to measure motor activity over a 1- and 10-minute periods. Blood samples were collected from all males of the principal groups and from all females of the toxicity groups at the end of the treatment period. At final sacrifice, specified organs were weighed and a complete macroscopic post-mortem examination was performed. A microscopic examination was performed on a range of sampled tissue and organs for all males of the principal groups and females of the toxicity group. slightly lower sodium, potassium and glucose levels in males given 100 mg/kg/day, treatment-related degenerative/necrotic nephropathy in 9/10 males,while slightly lower sodium, potassium and glucose levels in males given 50 mg/kg/day,minimal degenerative/necrotic nephropathy in 4/10 males at 50 mg/kg/day. In female slight not significant transient decrease in body weight, slight degenerative/necrotic nephropathy in 3/10 females, no other substance-induced toxicity.While no substance-induced toxicity at these two dose-levels i.e. 10, 50 mg/kg/day. Under the conditions of this combined repeat-dose toxicity study with the reproduction/developmental toxicity screening test, the oral administration of test chemical to male and female Sprague-Dawley rats, from the pre-mating period, during mating and until sacrifice (males) or during gestation and lactation until day 4 post-partum (females), induced a transient decrease in body weight gain during lactation at 100 mg/kg/day. Slight transient decrease in body weight gain was also noted in females of the toxicity group at 100 mg/kg/day but no change in body weight was noted in males of the principal group at any dose-level. Tubular nephropathy was observed among some treated males (principal group) at 50 and 100 mg/kg/day and females (toxicity group) at 100 mg/kg/day. This was associated with slightly lower plasma levels of sodium, potassium and glucose. No signs of substance-induced maternal or paternal toxicity occurred at the low dose-level (10 mg/kg/day). Based on these results, the No Observed Adverse Effect Level (NOAEL) for parental toxicity was considered to be 50 mg/kg/day for the females and 10 mg/kg/day for the males
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