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EC number: 203-817-2 | CAS number: 110-94-1
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- Irritation / corrosion
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Endpoint summary
Administrative data
Description of key information
An in vitro skin corrosion study was performed on glutaric acid. As a result of this study it was concluded that the substance was corrosive to the skin. In accordance with Annex VII of REACH, the substance being classified as corrosive to the skin, the eye irritation and skin irritation studies do not need to be conducted.
In accordance with the CLP Regulation, glutaric acid was classified as Skin Corr 1A; H314 and Eye Dam 1; H318.
Key value for chemical safety assessment
Skin irritation / corrosion
Link to relevant study records
- Endpoint:
- skin irritation: in vitro / ex vivo
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- the study need not be conducted because the available information indicates that the criteria are met for classification as corrosive to the skin or irritating to eyes
- Reason / purpose for cross-reference:
- data waiving: supporting information
- Endpoint:
- skin corrosion: in vitro / ex vivo
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- From 13 September 2016 to 15 September 2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 431 (In Vitro Skin Corrosion: Reconstructed Human Epidermis (RHE) Test Method)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: Method B.40bis of Commission Regulation (EC) No 440/2008
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Test system:
- human skin model
- Source species:
- other: Reconstructed Human Epidermis
- Details on animal used as source of test system:
- Not applicable
- Vehicle:
- unchanged (no vehicle)
- Details on test system:
- REMOVAL OF TEST MATERIAL AND CONTROLS
- Rinsing was achieved by filling and emptying each tissue under a constant soft stream of DPBS to gently remove any residual test item. Excess DPBS was removed by blotting the bottom of the tissue insert with tissue paper.
DYE BINDING METHOD
- Dye used in the dye-binding assay: MTT
- Spectrophotometer: Anthos 2001 microplate reader
- Wavelength: 562nm (OD562) - Control samples:
- yes, concurrent negative control
- yes, concurrent positive control
- Amount/concentration applied:
- TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 25 mg
NEGATIVE CONTROL
- Amount(s) applied (volume or weight with unit): 50 μL
- Lot/batch no. (if required): 3011859
- Purity: Not supplied
POSITIVE CONTROL
- Amount(s) applied (volume or weight with unit): 50 μL
- Lot/batch no. (if required): SLBM9898V
- Purity: 7.92N (specification 7.92 – 8.08N) - Duration of treatment / exposure:
- 3 and 60 minutes
- Number of replicates:
- Duplicate
- Irritation / corrosion parameter:
- % tissue viability
- Run / experiment:
- 3 minutes
- Value:
- 24.6
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Irritation / corrosion parameter:
- % tissue viability
- Run / experiment:
- 60 minutes
- Value:
- 9.6
- Vehicle controls validity:
- not applicable
- Negative controls validity:
- valid
- Positive controls validity:
- valid
- Other effects / acceptance of results:
- - OTHER EFFECTS:
- Direct-MTT reduction: none
- Colour interference with MTT: none
DEMONSTRATION OF TECHNICAL PROFICIENCY:
ACCEPTANCE OF RESULTS:
- Acceptance criteria met for negative control: yes
- Acceptance criteria met for positive control: yes
- Acceptance criteria met for variability between replicate measurements: yes - Interpretation of results:
- Category 1A (corrosive) based on GHS criteria
- Conclusions:
- The Relative mean tissue viability calculated as a percentage of the negative control was 9.6% after the 60-minute exposure and 24.6% after the 3 minute exposure. The test item met the criteria for classification as corrosive to the skin (Skin Corr 1A) according to Regulation (EC) No.1272/2008 on the Classification, Labelling and Packaging of Substances and Mixtures.
- Executive summary:
The in vitro skin corrosion of the test substance was determined in accordance with the OECD Guideline for Testing of Chemicals 431. The purpose of this test is to evaluate the corrosivity potential of the test item using the EpiDerm™ Human Skin Model after treatment periods of 3 and 60 minutes. Corrosion is directly related to cytotoxicity in the EpiDerm™ tissue. Cytotoxicity is determined by the reduction of MTT (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl-tetrazolium bromide) to formazan by viable cells in the test item treated tissues relative to the corresponding negative control. The results are used to make a prediction of the corrosivity potential of the test item.
Duplicate tissues were treated with the test item for exposure periods of 3 and 60 minutes. At the end of the exposure period the test item was rinsed from each tissue before each tissue was taken for MTT-loading. After MTT loading each tissue was placed in 2 mL Isopropanol for MTT extraction.
At the end of the formazan extraction period each well was mixed thoroughly and triplicate 200 μL samples were transferred to the appropriate wells of a pre-labeled 96-well plate. The optical density (OD) was measured at 562 nm (OD562). Data are presented in the form of percentage viability (MTT reduction in the test item treated tissues relative to negative control tissues).
The Relative mean tissue viability calculated as a percentage of the negative control was 9.6% after the 60-minute exposure and 24.6% after the 3 minute exposure. The test item met the criteria for classification as corrosive to the skin (Skin Corr 1A) according to Regulation (EC) No.1272/2008 on the Classification, Labelling and Packaging of Substances and Mixtures.
Referenceopen allclose all
The relative mean viabilities for each treatment group were as follows:
Exposure period | Percentage viability | ||
Negative control | Positive control | Test item | |
3 minute | 100 | 4.2 | 24.6 |
60 minute | 100 | 3.7 | 9.6 |
Endpoint conclusion
- Endpoint conclusion:
- adverse effect observed (corrosive)
Eye irritation
Link to relevant study records
- Endpoint:
- eye irritation: in vitro / ex vivo
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- the study need not be conducted because the available information indicates that the criteria are met for classification as corrosive to the skin or irritating to eyes
- Reason / purpose for cross-reference:
- data waiving: supporting information
Reference
Endpoint conclusion
- Endpoint conclusion:
- no study available
Respiratory irritation
Endpoint conclusion
- Endpoint conclusion:
- no study available
Additional information
In accordance with Annex VII of REACH, the in vitro skin irritation and in vitro eye irritation does not need to be conducted as the substance is classified as corrosive to the skin.
Justification for classification or non-classification
The Relative mean tissue viability of Epiderm Reconstructed Human Epidermis calculated as a percentage of the negative control was 9.6% after the 60-minute exposure and 24.6% after the 3 minute exposure. Glutaric acid met the criteria for classification as Skin Corr 1A; H314 in accordance to the CLP Regulation.
In accordance with the CLP Regulation and Annex VII of REACH, a substance being classified as corrosive to the skin shall be classified as Eye Dam 1; H318.
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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