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EC number: 221-328-2 | CAS number: 3068-76-6
- 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
![](https://echa-term.echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_toxicological-information.png)
Endpoint summary
Administrative data
Description of key information
Buehler-test (OECD 406): not sensitizing
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
- Study period:
- 2014-11-19 to 2014-12-25
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 406 (Skin Sensitisation)
- Deviations:
- no
- GLP compliance:
- yes
- Type of study:
- Buehler test
- Justification for non-LLNA method:
- The Buehler type of sensitization test was selected since the test substance is a functional silane and the Local Lymph Node Assay as the preferred alternative has shown to provide false positive results for silicone substances.
- Species:
- guinea pig
- Strain:
- Dunkin-Hartley
- Sex:
- female
- Details on test animals and environmental conditions:
- TEST ANIMALS:
- Source: Charles River France, L’Arbresle Cedex, France
- Weight at study initiation: 252 - 302 g
- Age at study initiation: approx. 4 weeks
- Housing: Group housing of maximally 5 animals per Noryl cage
- Bedding: sawdust from JRS - J.Rettenmaier & Söhne GmbH + CO. KG, Rosenberg, Germany
- Diet: maintenance diet for guinea pigs (MS-H, SSNIFF® Spezialdiäten GmbH, Soest, Germany). Hay (TecniLab-BMI BV, Someren, The Netherlands), provided at least twice a week
- Water: (tap/filtered) water, ad libitum
- Acclimation period: at least 5 days
ENVIRONMENTAL CONDITIONS:
- Temperature (°C): 18 - 24
- Humidity (%): 40 - 70
- Air changes (per hr): 10
- Photoperiod (hrs dark / hrs light): 12/12 - Route:
- epicutaneous, occlusive
- Vehicle:
- corn oil
- Concentration / amount:
- 100%
- Route:
- epicutaneous, occlusive
- Vehicle:
- corn oil
- Concentration / amount:
- 100%
- No. of animals per dose:
- 10 (controls), 20 (in test groups)
- Details on study design:
- RANGE FINDING TESTS
- For the dermal inductions the initially test item concentrations were 1, 2, 5, 10, 20, 50 and 100%. The undiluted test item was selected for main study.
MAIN STUDY
A. INDUCTION EXPOSURE
- No. of exposures: 3
- Exposure period: 6 h
- Test groups: test substance in corn oil
- Control group: water
- Site: left scapular region
- Frequency of applications: every 7 days
- Duration: days 0-21
- Concentrations: 100%
B. CHALLENGE EXPOSURE
- No. of exposures: 1
- Day(s) of challenge: 28
- Exposure period: 6 h
- Test groups: test substance in corn oil
- Control group: water
- Site: right flank
- Concentrations: 100%
- Evaluation: 24 and 48 h after patch removal - Challenge controls:
- The control group is actually a challenge control
- Positive control substance(s):
- yes
- Remarks:
- a-hexylcinnamicaldehyde
- Positive control results:
- The six-month reliability check with a-hexylcinnamicaldehyde indicates that the Buehler Test is an appropriate model for testing for contact hypersensitivity. The skin reactions observed in four experimental animals in response to the 50% test substance concentration in the challenge phase were considered indicative of sensitization, based on the absence of any response in the control animals. These results lead to a sensitization rate of 40 percent.
- Reading:
- 1st reading
- Hours after challenge:
- 24
- Group:
- negative control
- Dose level:
- 100%
- No. with + reactions:
- 0
- Total no. in group:
- 10
- Remarks on result:
- other: Reading: 1st reading. . Hours after challenge: 24.0. Group: negative control. Dose level: 100%. No with. + reactions: 0.0. Total no. in groups: 10.0.
- Reading:
- 2nd reading
- Hours after challenge:
- 48
- Group:
- negative control
- Dose level:
- 100%
- 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: 100%. No with. + reactions: 0.0. Total no. in groups: 10.0.
- Reading:
- 1st reading
- Hours after challenge:
- 24
- Group:
- test chemical
- Dose level:
- 100%
- No. with + reactions:
- 0
- Total no. in group:
- 20
- Remarks on result:
- other: Reading: 1st reading. . Hours after challenge: 24.0. Group: test group. Dose level: 100%. No with. + reactions: 0.0. Total no. in groups: 20.0.
- Reading:
- 2nd reading
- Hours after challenge:
- 48
- Group:
- test chemical
- Dose level:
- 100%
- 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: 100%. No with. + reactions: 0.0. Total no. in groups: 20.0.
- Reading:
- 1st reading
- Hours after challenge:
- 24
- Group:
- positive control
- Dose level:
- 50%
- No. with + reactions:
- 4
- Total no. in group:
- 10
- Remarks on result:
- other: Reading: 1st reading. . Hours after challenge: 24.0. Group: positive control. Dose level: 50%. No with. + reactions: 4.0. Total no. in groups: 10.0.
- Reading:
- 2nd reading
- Hours after challenge:
- 48
- Group:
- positive control
- Dose level:
- 50%
- No. with + reactions:
- 0
- Total no. in group:
- 10
- Remarks on result:
- other: Reading: 2nd reading. . Hours after challenge: 48.0. Group: positive control. Dose level: 50%. No with. + reactions: 0.0. Total no. in groups: 10.0.
- Interpretation of results:
- other: CLP/EU GHS criteria are not met, no classification required according to Regulations (EC) No 1272/2008
Reference
TOXICITY/MORTALITY
No mortality occurred and no symptoms of systemic toxicity were observed in the animals of the main study.
BODY WEIGHT
Body weights and body weight gain of experimental animals remained in the same range as controls over the study period.
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not sensitising)
- Additional information:
The skin sensitizing properties of N-phenyl-3-aminopropyltrimethoxysilane (CAS 3068-76-6) were tested in a study according to OECD TG 406 under GLP conditions using the test for delayed contact hypersensitivity in guinea pigs (Buehler-test, WIL, 2015).
For the dermal inductions the initially test item concentration was 100% (v/v). A 100% (v/v) preparation of the test item was selected for the challenge application. Topical application of the appropriate test substance concentrations (20 test animals) or vehicle (10 control animals) was performed once a week at the right flanks of each animal for three consecutive weeks. Seven days following the last topical application of the test substance or vehicle (corn oil) all animals were challenged with the test substance at a concentration of 100% (v/v). Skin reactions of all animals were evaluated 24 and 48 hours after challenge administration. No animal showed any skin reactions. Positive controls were included in the study and gave the expected result.No mortality occurred and no symptoms of systemic toxicity were observed in the animals of the main study. Body weights and body weight gain of experimental animals remained in the same range as controls over the study period.Thus, N-phenyl-3-aminopropyltrimethoxysilane (CAS 3068-76-6) was not skin sensitizing under the conditions of this Buehler test.
Respiratory sensitisation
Endpoint conclusion
- Endpoint conclusion:
- no study available
- Additional information:
The study is not required according to Annex VII-X of Regulation (EC) No 1907/2006.
Justification for classification or non-classification
Based on the reliable data on the registered substance it is concluded that the data does not meet the criteria for classification according to Regulation (EC) 1272/2008 and according to Directive 67/548/EEC, and therefore conclusive but not sufficient for classification.
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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