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EC number: 214-684-5 | CAS number: 1185-53-1
- 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
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Endpoint summary
Administrative data
Description of key information
Skin irritation: OECD 439, not
irritating to the skin
Eye irritation: OECD 437, not irritating to the eye
Respiratory irritation: no data available
Key value for chemical safety assessment
Skin irritation / corrosion
Link to relevant study records
- Endpoint:
- skin irritation: in vitro / ex vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- November 1, 2016 - December 20, 2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.46 (In Vitro Skin Irritation: Reconstructed Human Epidermis Model Test)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 439 (In Vitro Skin Irritation: Reconstructed Human Epidermis Test Method)
- Qualifier:
- according to guideline
- Guideline:
- other: Skinethic skin irritation test -42bis Standard operating procedure (SOP) 2009
- GLP compliance:
- yes (incl. QA statement)
- Specific details on test material used for the study:
- Designation: Art. 108219
Synonym: Tris(hydroxymethyl)-aminomethananhydrochlorid
Trade name: TRIS-HCL Emprove Bio Bulk
CAS-No.: 1185-53-1
Batch: TD16007119
Purity: 100.2% (Titration with perchloric acid)
Appearance: Colourless crystals
Expiry date: June 30, 2021
Storage: +15 to +25°C, store in tightly closed containers, protected from moisture - Test system:
- human skin model
- Source species:
- human
- Cell type:
- non-transformed keratinocytes
- Cell source:
- foreskin from a single donor
- Justification for test system used:
- standard model
- Vehicle:
- unchanged (no vehicle)
- Remarks:
- No vehicle used in this study; The test item was applied neat to the tissues.
- Details on test system:
- CELL CULTURE
- Supplier: EpiSkin/SkinEthic Laboratories, Lyon, France)
- Source: human keratinocytes cultured on a polycarbonate filter in conditions which permit their terminal differentiation
- Format: 24 well plate
- Batch: 16-RHE-122
- Expires: November 28, 2016
TEMPERATURE USED FOR TEST SYSTEM
- Temperature used during treatment: room temperature
- Temperature of post-treatment incubation: 37°C
REMOVAL OF THE TEST MATERIAL AND CONTROL
After the end of the treatment interval, the residual test item was removed immediately by gently rinsing with a minimum volume of 25 mL DPBS using a pipette. Excess DPBS was removed by gently shaking the inserts and blotting the bottom with blotting paper. - Control samples:
- yes, concurrent negative control
- Amount/concentration applied:
- TEST MATERIAL: 16 mg of solid test material
NEGATIVE CONTROL: 16 µL (Dulbecco`s Phosphate-Buffered Saline)
POSITIVE CONTROL: 16 µL (5% aqueous solution of sodium dodecyl sulfate in deionised water) - Duration of treatment / exposure:
- 42 min (± 1 minute)
- Duration of post-treatment incubation (if applicable):
- 42 hours (± 1 hour)
- Number of replicates:
- 3
- Irritation / corrosion parameter:
- % tissue viability
- Run / experiment:
- Experiment 1 / Run 1
- Value:
- 85.95
- Vehicle controls validity:
- not applicable
- Remarks:
- The test item was applied neat to the tissues
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Remarks on result:
- no indication of irritation
- Other effects / acceptance of results:
- OTHER EFFECTS:
- Visible damage on test system: none
- Direct-MTT reduction: none
- Colour interference with MTT: none
ACCEPTANCE OF RESULTS:
Acceptability of the Quality Control Data of the Skin Model with Reference to Historical Batch Data:
The negative control OD values were 2.450, 2.192 and 2.313 and, thus, in the range of ≥0.8 and ≤3.0.
Acceptability of the Positive and Negative Control:
After treatment with the positive control (5% aqueous solution of sodium dodecyl sulfate) the mean viability value was 1.13% (standard deviation: 2.95%) and, thus, lower than the historically established threshold of 3.12%.
After treatment with the negative control (DPBS-buffer) the mean OD was 2.318 (standard deviation: 5.57%) and, thus, higher than the historically established threshold of 1.436.
Variability of the Data:
The standard deviation between the three tissues replicates treated with the test item was 11.38% and, thus, ≤18%.
The standard deviations between the three tissue replicates of the negative control and the positive control were 5.57% and 2.95%, respectively, and, thus, ≤18%.
The study met all acceptance criteria. - Interpretation of results:
- GHS criteria not met
- Conclusions:
- This study was performed according to GLP and the methods applied are fully compliant with OECD TG 439. Under the conditions of the present study, the test item TRIS-HCL is not considered to possess an irritant potential to skin (UN GHS: No Category).
- Executive summary:
This study was performed according to GLP and the methods applied are fully compliant with OECD TG 439. Under the conditions of the present study, the test item TRIS-HCl is not considered to possess an irritant potential to skin.
Reference
Group | Time / [min] | Mean OD | Mean Relative viability / [%] |
Negative Control | 42 | 2.318 | 100 |
Positive Control | 42 | 0.026 |
1.13 |
Test Material |
42 |
1.993 |
85.95 |
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Eye irritation
Link to relevant study records
- Endpoint:
- eye irritation: in vitro / ex vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- November 1, 2016 - January 6, 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 437 (Bovine Corneal Opacity and Permeability Test Method for Identifying Ocular Corrosives and Severe Irritants)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU method B.47 (Bovine corneal opacity and permeability test method for identifying ocular corrosives and severe irritants)
- GLP compliance:
- yes (incl. QA statement)
- Specific details on test material used for the study:
- Designation: Art. 108219
Synonym: Tris(hydroxymethyl)-aminomethananhydrochlorid
Trade name: TRIS-HCL Emprove Bio Bulk
CAS-No.: 1185-53-1
Batch: TD16007119
Purity: 100.2% (Titration with perchloric acid)
Appearance: Colourless crystals
Expiry date: June 30, 2021
Storage: +15 to +25°C, store in tightly closed containers, protected from moisture
PREPARATION OF THE TEST MATERIAL
The test item Art. 108219 (TRIS-HCL Emprove Bio Bulk) was prepared as a 20% (w/v) solution in a 0.9% sodium chloride solution. The stability in the vehicle was not investigated. The test item preparation was administered within <1 hour after preparation. - Vehicle:
- physiological saline
- Controls:
- yes, concurrent vehicle
- yes, concurrent positive control
- Amount / concentration applied:
- TEST MATERIAL: 750 µL (i.e. 150mg/750µL)
NEGATIVE / VEHICLE CONTROL: 750 µL
Designation: 0.9% sodium chloride solution
Supplier: B. Braun Melsungen AG, Germany
Batch: 15464012
Released until: October 2018
POSITIVE CONTROL: 750 µL
Designation: Art. 814223
Synonym: Imidazole
Supplier: Merck KGaA, Germany
Batch: S6746923
Purity (GC) 99.8% (a/a)
Released until: August 31, 2018
Imidazole was dissolved with 0.9% sodium chloride solution to a concentration of 20% (w/v) - Duration of treatment / exposure:
- 240 minutes
- Number of animals or in vitro replicates:
- in vitro: triplicate design
- Irritation parameter:
- in vitro irritation score
- Run / experiment:
- Run 1 / Experiment 1
- Value:
- 0.8
- Vehicle controls validity:
- valid
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Remarks on result:
- no indication of irritation
- Other effects / acceptance of results:
- OTHER EFFECTS:
- Visible damage on test system: No observations (e.g. tissue peeling, residual test chemical, non-uniform opacity patterns) were seen in a visually inspection of the corneas after treatment.
ACCEPTANCE OF RESULTS:
- Acceptance criteria met for negative control: After treatment with the negative control (0.9% sodium chloride solution) the calculated IVIS was 0.4 and, thus, within three standard deviations of the current historical mean of the negative control (IVIS: -1.4 – 3.4).
- Acceptance criteria met for positive control: After treatment with the positive control (20% Imidazole) the calculated IVIS was 111.4 and, thus, also within two standard deviations of the current historical mean of the positive control (IVIS 78.8 – 134.7). Therefore, the study fulfilled the acceptance criteria. - Interpretation of results:
- GHS criteria not met
- Conclusions:
- Under the conditions of the present study, the test itemTRIS-HCL did not show an eye hazard potential. The test item is not requiring classification for eye irritation or serious eye damage (UN GHS: No Category).
- Executive summary:
This study was performed according to GLP and the methods applied are fully compliant with OECD TG 437. Under the conditions of the present study, the test itemTRIS-HCL did not show an eye hazard potential. The test item is not requiring classification for eye irritation or serious eye damage (UN GHS: No Category).
Reference
Opacity |
Permeability |
IVIS |
||||
per cornea |
per group (mean value) |
SD |
||||
Negative control |
0.9% NaCl Solution |
0.5 |
0.000 |
0.500 |
0.4 |
0.2 |
0.2 |
0.001 |
0.515 |
||||
0.2 |
-0.002 |
0.170 |
||||
Positive control |
20% Imidazole solution |
76.1 |
2.854 |
118.910 |
111.4 |
9.5 |
80.6 |
2.270 |
114.650 |
||||
54.2 |
3.102 |
100.730 |
||||
Test item |
Art. 108219 |
1.8 |
-0.001 |
1.785 |
0.8 |
0.9 |
0.1 |
-0.001 |
0.085 |
||||
0.4 |
0.001 |
0.415 |
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Respiratory irritation
Endpoint conclusion
- Endpoint conclusion:
- no study available
Additional information
Skin irritation:
In an in-vitro skin irritation study according to OECD 439 the potential of the test item TRIS HCl to induce skin irritation in an in vitro human skin model was investigated (reference 7.3.1 -1). The test item was applied topically to a human reconstructed skin model followed by determination of the cell viability. Cell viability was determined by enzymatic conversion of vital dye MTT into a blue formazan salt and measurement of the formazan salt after extraction from tissues. The percent reduction of cell viability in comparison to untreated negative controls was used to predict the skin irritation potential. Triplicates of the human skin RHE-model were treated with the test item, the negative or the positive control for 42 minutes (± 1 minute). 16 µL of either the negative control (DPBS-buffer) or the positive control (5% aqueous solution of sodium dodecyl sulfate) were applied to the tissues. Before application of 16 mg of the solid test item, 10 µL of deionised water was spread to the epidermis surface to improve the contact between the test item and the epidermis. After treatment with the negative control (DPBS-buffer) the mean OD was 2.318 (study acceptance criterion: >1.436). Treatment with the positive control (5% aqueous solution of sodium dodecyl sulfate) revealed a mean viability value of 1.13% (study acceptance criterion: <3.12%). Thus, the acceptance criteria were met. Following treatment with the test item TRIS HCl, the tissue viability was 85.95% and, thus, higher than 50%, i.e. according to OECD 439 the test item is considered as non-irritant to skin.Under the conditions of the present study, the test item TRIS HCl is not considered to possess an irritant potential to skin (UN GHS: No Category).
There is further supporting in-vivo data from the source substance Trometamol (CAS 77-86-1, EC 201-064-4) available, which is considered suitable for read-across using the analogue approach.
In a supporting study performed according to OECD 404 on rabbits, 0.5 g Trometamol (moistened with water) was applied to shaved skin and covered with a semi-occlusive dressing for 4 hours (reference 7.3.1 -2). No erythema or edema was observed in any of the animals 1, 24, 48 and 72 hours after exposure ended.
Eye irritation:
In an in-vitro eye irritation study according to OECD 437 the potential of the test item TRIS HCl to induce serious eye damage in the BCOP assay was investigated (reference 7.3.2 -1). The BCOP assay with isolated fresh bovine corneas is an accepted in vitro model for ocular hazard assessment. To determine the eye hazard potential the induced opacity and increased permeability was investigated in isolated bovine corneas after exposure to the test item TRIS HCL as a 20% (w/v) solution in a 0.9% sodium chloride solution. As negative control 0.9% sodium chloride solution and as positive control 20% (w/v) Imidazole was used. Three corneas were used per group (negative control, positive control or test item group). After a first opacity measurement of the untreated bovine corneas, 750 µL of the dissolved test item, positive or negative control were applied on the corneas and incubated for 240 minutes. After the incubation phase the test item, the positive, and the negative control were rinsed from the corneas and the opacity was measured again. After the opacity measurements, the permeability of the corneas was determined by application of a fluorescein solution for 90 minutes. The amount of fluorescein solution that crossed the cornea was measured spectrophotometrically. The opacity and permeability assessments were combined to determine an in vitro Irritancy Score (IVIS). After treatment with the negative control (0.9% sodium chloride solution) the calculated IVIS was 0.4 (study acceptance criteria range: -1.4 – 3.4). Treatment with the positive control (20% Imidazole) revealed an IVIS of 111.4 (study acceptance criteria range: 78.8 – 134.7). Therefore, the study fulfilled the acceptance criteria. The IVIS obtained after treatment with TRIS HCL was 0.8 and, thus, lower than 3,i.e.according to OECD 437 the test item is not requiring classification for eye irritation or serious eye damage. Under the conditions of the present study, the test item TRIS HCl did not show an eye hazard potential. The test item is not requiring classification for eye irritation or serious eye damage (UN GHS: No Category).
There is further supporting data from the source substance Trometamol (CAS 77-86-1, EC 201-064-4) available, which is considered suitable for read-across using the analogue approach.
In a study performed according to OECD 405, 0.1 g of Trometamol was instilled into one eye of each of 3 rabbits (reference 7.3.2 -2). The eyes remained unwashed and were assessed for irritation 1, 24, 48 and 72 hours after the instillation. Slight to moderate effects on the conjunctiva (score 1-2) and chemosis (score 1-2) were observed from the 1-hour reading time point in 3/3 rabbits. The maximum mean scores for both effects on the conjunctiva and chemosis were 1.33 for 1/3 rabbits, and 0.33 for 2/3 rabbits, respectively. The irritation effects had cleared completely in 2/3 rabbits within 48 hours and in the remaining rabbit with the highest mean scores within 72 hours. No damage to the iris or cornea was observed at any reading time point.
Justification for classification or non-classification
The available data on skin and eye irritation do not meet the criteria for classification according to Regulation (EC) 1272/2008, and are 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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