Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Diss Factsheets
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 240-354-5 | CAS number: 16230-35-6
- 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.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_toxicological-information.png)
Eye irritation
Administrative data
- Endpoint:
- eye irritation: in vitro / ex vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- November 7, 2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
- Report date:
- 2017
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 438 (Isolated Chicken Eye Test Method for Identifying i) Chemicals Inducing Serious Eye Damage and ii) Chemicals Not Requiring Classification for Eye Irritation or Serious Eye Damage)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU method B.48 (Isolated chicken eye test method for identifying occular corrosives and severe irritants)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- N,N'-(ethoxymethylsilylene)bis[N-methylbenzamide]
- EC Number:
- 240-354-5
- EC Name:
- N,N'-(ethoxymethylsilylene)bis[N-methylbenzamide]
- Cas Number:
- 16230-35-6
- Molecular formula:
- C19H24N2O3Si
- IUPAC Name:
- N,N'-[ethoxy(methyl)silanediyl]bis(N-methylbenzamide)
- Test material form:
- liquid
Constituent 1
- Specific details on test material used for the study:
- STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: room temperature.
Test animals / tissue source
- Species:
- chicken
- Strain:
- not specified
- Details on test animals or tissues and environmental conditions:
- SOURCE OF COLLECTED EYES
- Source: Slaughterhouse (Etablissement Brun, 33820 Etauliers, France), the chickens were killed for human consumption.
- Characteristics of donor animals: spring chickens (approximately 7 weeks old, 1.5-2.5 kg).
- Storage, temperature and transport conditions of ocular tissue: Heads have been removed immediately after sedation of the chickens by electric shock, and incision of the neck for bleeding. Intact heads were transported from the slaughterhouse at ambient temperature in plastic boxes humidified with towels moistened with physiological saline.
- Time interval prior to initiating testing: The head collection was at 8:20 am and arrived at 9:45 am at the laboratory.
- indication of any existing defects or lesions in ocular tissue samples: No.
- Indication of any antibiotics used: No
Test system
- Vehicle:
- unchanged (no vehicle)
- Controls:
- yes, concurrent positive control
- yes, concurrent negative control
- Amount / concentration applied:
- TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 30 µL
- Duration of treatment / exposure:
- 10 seconds
- Duration of post- treatment incubation (in vitro):
- 4 hours
- Number of animals or in vitro replicates:
- 3
- Details on study design:
- SELECTION AND PREPARATION OF ISOLATED EYES
Dissection of the eyes: the eyelids were carefully excised, taking care not to damage the cornea. The eyeball was pulled from the orbit by holding the nictitating membrane firmly with surgical forceps, and the eye muscles were cut with a bent, blunt-tipped scissor. When the eye is removed from the orbit, a visible portion of the optic nerve should be left attached. Once removed from the orbit, the eye was placed on an absorbent pad and the nictitating membrane and other connective tissue were cut away.
Selection of the eyes: The enucleated eye was mounted in a stainless steel clamp with the cornea positioned vertically. The clamp was then transferred to a chamber of the superfusion apparatus. The clamps were positioned in the superfusion apparatus such that the entire cornea was supplied with the physiological saline drip (in the range 0.1 to 0.15 mL/min). The chambers of the superfusion apparatus was temperature controlled between 32.3ºC and 32.6ºC. After being placed in the superfusion apparatus, the eyes were examined with a slit-lamp microscope to ensure that they have not been damaged during the dissection procedure using sodium fluorescein. Corneal thickness was also measured at this time at the corneal apex using the depth measuring device on the slit-lamp microscope. Eyes with, (i), a fluorescein retention score of > 0.5, (ii) corneal opacity < 0.5; or, (iii), any additional signs of damage were replaced. For eyes that are not rejected based on any of these criteria, individual eyes with a corneal thickness deviating more than 10% from the mean value for all eyes are to be rejected.
EQUILIBRATION AND BASELINE RECORDINGS
The eyes examined and approved were incubated between 45 and 65 minutes to equilibrate them to the test system prior to dosing. Following the equilibration period, a zero reference measurement was recorded for corneal thickness and opacity to serve as a baseline (i.e. time = 0). The fluorescein score determined at dissection was used as the baseline measurement for that endpoint.
NUMBER OF REPLICATES: 3
NEGATIVE CONTROL USED: 30 µL Physiological saline (Dutscher Batch No. 3011922) (1 replicate).
POSITIVE CONTROL USED: 30 µL of 5% Benzalkonium chloride (Sigma-Batch No. BCBQ4374V) (3 replicates).
APPLICATION DOSE AND EXPOSURE TIME
30 µL of the test item was applied for 10 seconds.
OBSERVATION PERIOD
Pretreatment and at 30, 75, 120, 180 and 240 minutes (± 5 minutes) after the post-treatment rinse.
REMOVAL OF TEST SUBSTANCE
- Volume and washing procedure after exposure period:20 mL of physiological saline at ambient temperature.
- Indicate any deviation from test procedure in the Guideline: no.
METHODS FOR MEASURED ENDPOINTS:
- Corneal opacity: It was measured using a Haag-Streit BP900 slit-lamp microscope with depth-measuring device no. I. It was calculated using the area of the cornea that was most densely opacified for scoring.
- Damage to epithelium based on fluorescein retention: It was calculated for the 30-minute observation time point only, which was used for the overall category score given for each test or control item.
- Swelling: measured with optical pachymeter on a slit-lamp microscope; slit-width setting: It was measured using a Haag-Streit BP900 slit-lamp microscope with depth-measuring device no. I, the slit-width was set at 9 1/2, equalling 0.095 mm. Themean percentage of corneal swelling was calculated for all observation time points.
- Macroscopic morphological damage to the surface: Include "pitting" of the corneal epithelial cells, "loosening" of epithelium, "roughening" of the corneal surface and "sticking" of the test item to the cornea. These findings can vary in severity and may occur simultaneously. The classification of these findings is subjective according to the interpretation of the investigator.
SCORING SYSTEM:
- Mean corneal swelling (%): (corneal thickness at time t - corneal thickness at time=0/ corneal thickness at time=0) x 100.
- Mean maximum opacity score: 0= No opacity; 0.5= Very faint opacity; 1= Scattered or diffuse areas, details of the iris clearly visible; 2= easily discernible translucent area, details of the iris are slighly obscured; 3= Severe corneal opacity, no specific details of the iris are visible, size of the pupil is barely discernible; 4= Complete corneal opacity, iris invisible.
- Mean fluorescein retention score at 30 minutes post-treatment: 0= No fluorescein retention; 0.5= Very minor single cell staining; 1= Single cell staining scattered throughout the treated area of the cornea; 2= Focal or confluent dense single cell staining; 3= Confluent large areas of the cornea retaining fluorescein.
DECISION CRITERIA: please specify if the decision criteria as indicated in the TG was used.
All endpoints were evaluated separately to generate an ICE class for each endpoint and then combined to generate an Irritancy Classification for the test item. The ICE classes were assigned based on a predetermined range.
ICE classification criteria for corneal thickness: 0 to 5 = class I; >5 to 12 = class II; >12 to 18 (>75 min after treatment)= class II; >12 to 18 (≤75 min after treatment)= class III; >18 to 26= class III; >26 to 32 (>75 min after treatment)= class III; >26 to 32 (≤75 min after treatment)= class IV; >32 = class IV.
ICE classification criteria for opacy: 0.0-0.5 0 class I; 0.6-1.5= class II; 1.6-2.5= class III; 2.6-3.0= class IV.
ICE classification criteria for mean fluorescein retention: 0.0-0.5 = clas I; 0.6-1.5= class II; 1.6-2.5=class III; 2.6-3.0= class IV.
Overall in vitro classifications:
No category= 3 x I / 2 x I, 1 x II.
No prediction can be made= Other combinations.
Category 1 (Corrosive/Severe Irritant)= 3 x IV / 2 x IV, 1 x III / 2 x IV, 1 x II / 2 x IV, 1 x I / Corneal opacity ≥ 3 at 30 min (in at least 2 eyes) / Corneal opacity = 4 at any time point (in at least 2 eyes) / Severe loosening of the epithelium (in at least 1 eye).
Results and discussion
In vitro
Resultsopen allclose all
- Irritation parameter:
- cornea opacity score
- Run / experiment:
- Maximal mean
- Value:
- ca. 3
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Remarks on result:
- other: ICE class IV
- Irritation parameter:
- fluorescein retention score
- Run / experiment:
- Mean
- Value:
- ca. 3
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Remarks on result:
- other: ICE class IV
- Irritation parameter:
- percent corneal swelling
- Run / experiment:
- Maximal mean
- Value:
- ca. 30
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Remarks on result:
- other: ICE class III
- Other effects / acceptance of results:
- OTHER EFFECTS:
- Visible damage on test system: A severe loosening of the epithelium was also noted in one treated eye from 30 minutes post-dose.
DEMONSTRATION OF TECHNICAL PROFICIENCY: Yes, 12 of the 13 chemicals tested obtained the same category as OECD 438. There was a borderline chemical (DMSO) over-classified ("No prediction can be made" vs. "No Category") in three separated tests. It should be tested with other adequately validated in vitro tests.
ACCEPTANCE OF RESULTS:
- Acceptance criteria met for negative control: Yes, the combination of the three endpoints was 3 x I and classified as "No Category".
- Acceptance criteria met for positive control: Yes, the combination of the three endpoints was 3 x IV ans classified as "Corrosive/Severe Irritant".
Any other information on results incl. tables
Table 1. Individual and average values for evaluation of corneal lesions after treatment with the negative control (Physiological saline)
Endpoint measured |
Eye No. |
Time (min) |
|||||
0 |
30 |
75 |
120 |
180 |
240 |
||
Corneal opacity |
16 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
ICE class |
I |
||||||
Fluorescein retention |
16 |
0.5 |
0.5 |
- |
- |
- |
- |
ICE class |
|
I |
- |
- |
- |
- |
|
Corneal thickness |
16 |
0.54 |
0.54 |
0.54 |
0.55 |
0.55 |
0.55 |
Corneal swelling (%) |
16 |
- |
0 |
0 |
2 |
2 |
2 |
ICE class |
I |
||||||
Combination of the 3 endpoints |
3 x I |
||||||
CLASSIFICATION |
No Category |
Note: No morphological effects were noted, whatever the examination time.
Table 2. Individual and average values for evaluation of corneal lesions after treatment with the positive control (5% Benzalkonium chloride)
Endpoint measured |
Eye No. |
Time (min) |
|||||
0 |
30 |
75 |
120 |
180 |
240 |
||
Corneal opacity |
1 |
0 |
3 |
3 |
3 |
3 |
3 |
2 |
0 |
3 |
3 |
3 |
3 |
3 |
|
3 |
0 |
3 |
3 |
3 |
3 |
3 |
|
Mean |
0.0 |
3.0 |
3.0 |
3.0 |
3.0 |
3.0 |
|
ICE class |
IV |
||||||
Fluorescein retention |
1 |
0.5 |
3 |
- |
- |
- |
- |
2 |
0.5 |
3 |
- |
- |
- |
- |
|
3 |
0.5 |
3 |
- |
- |
- |
- |
|
Mean |
0.5 |
3.0 |
- |
- |
- |
- |
|
ICE class |
|
IV |
- |
- |
- |
- |
|
Corneal thickness |
1 |
0.54 |
0.63 |
0.98 |
1.06 |
1.20 |
1.20 |
2 |
0.60 |
0.78 |
0.89 |
0.99 |
0.99 |
0.99 |
|
3 |
0.56 |
0.72 |
0.72 |
0.88 |
0.88 |
0.90 |
|
Corneal swelling (%) |
1 |
- |
17 |
81 |
96 |
122 |
122 |
2 |
- |
30 |
48 |
65 |
65 |
65 |
|
3 |
- |
29 |
29 |
57 |
57 |
61 |
|
Mean |
- |
25 |
53 |
73 |
81 |
83 |
|
ICE class |
IV |
||||||
Combination of the 3 endpoints |
3 x IV |
||||||
CLASSIFICATION |
Category 1: Corrosive/Severe irritant |
Note:
Severe loosening of the corneal epithelium noted from 30 minutes post-dose in eyes No. 1, 2 & 3.
(-): evaluation of corneal swelling not possible (Corneal opacity=4 at each examination time, leading to a marked refraction of the light preventing from the evaluation of the corneal swelling with the biomicroscope).
Table 3. Individual and average values for evaluation of corneal lesions after treatment with the test item.
Endpoint measured |
Eye No. |
Time (min) |
|||||
0 |
30 |
75 |
120 |
180 |
240 |
||
Corneal opacity |
7 |
0 |
3 |
3 |
3 |
3 |
3 |
8 |
0 |
3 |
3 |
3 |
3 |
3 |
|
9 |
0 |
3 |
3 |
3 |
3 |
3 |
|
Mean |
0.0 |
3.0 |
3.0 |
3.0 |
3.0 |
3.0 |
|
ICE class |
IV |
||||||
Fluorescein retention |
7 |
0.5 |
3 |
- |
- |
- |
- |
8 |
0.5 |
3 |
- |
- |
- |
- |
|
9 |
0.5 |
3 |
- |
- |
- |
- |
|
Mean |
0.5 |
3.0 |
- |
- |
- |
- |
|
ICE class |
|
IV |
- |
- |
- |
- |
|
Corneal thickness |
7 |
0.54 |
0.72 |
0.72 |
0.74 |
0.76 |
0.77 |
8 |
0.62 |
0.65 |
0.67 |
0.67 |
0.68 |
0.74 |
|
9 |
0.60 |
0.67 |
0.67 |
0.76 |
0.76 |
0.76 |
|
Corneal swelling (%) |
7 |
- |
33 |
33 |
37 |
41 |
43 |
8 |
- |
5 |
8 |
8 |
10 |
19 |
|
9 |
- |
12 |
12 |
27 |
27 |
27 |
|
Mean |
- |
17 |
18 |
24 |
26 |
30 |
|
ICE class |
III |
||||||
Combination of the 3 endpoints |
2 x IV, I x III |
||||||
CLASSIFICATION |
Category 1: Corrosive/Severe irritant |
Note: Severe loosening of the corneal epithelium noted from 30 minutes post-dose in eye No. 7.
Applicant's summary and conclusion
- Interpretation of results:
- Category 1 (irreversible effects on the eye) based on GHS criteria
- Conclusions:
- The combination of the three endpoints for the test item was 2 x IV, 1 x III. Therefore, the test item has to be classified in Category 1 "Irreversible effects on the eye".
- Executive summary:
The eye irritation of the test item has been evaluated using the tests Isolated Chicken Eye test method, according to OECD 438 and EU method B.48, following GLP. The test item was applied, as supplied, at the dose of 30 µL to 3 enucleated chicken eyes during 10 seconds. Then the eyes were rinsed twice with 10 mL of physiological saline. Three eyes were treated in the same manner with a positive control ( 5% Benzalkonium chloride) and one eye with a negative control (physiological saline). Damages by the tests item were assessed by determination of corneal swelling, opacity, and fluorescein retention were evaluated pretreatment and at 30, 75, 120, 180 and 240 minutes post-dose. Fluorescein retention, corneal opacity and corneal swelling were evaluated, then the results of each endpoint were assigned to ICE classes according to OECD guideline 438. Positive control and negative control results were valid. Maximal mean score of corneal opacity was 3.0 corresponding to ICE class IV; mean score of fluorescein retention was 3.0, corresponding to ICE class IV; and maximal mean corneal swelling was 30%, corresponding to ICE class III. The combination of the three endpoints for the test item was 2 x IV, 1 x III. Therefore, according to CLP regulation (EC 1272/2008) the test item has to be classified in Category 1 "Irreversible effects on the eye".
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
![ECHA](/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/echa_logo.png)