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Diss Factsheets

Toxicological information

Skin irritation / corrosion

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Administrative data

skin irritation: in vitro / ex vivo
Type of information:
experimental study
Adequacy of study:
key study
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference Type:
study report
Report date:

Materials and methods

Test guideline
according to guideline
OECD Guideline 439 (In Vitro Skin Irritation: Reconstructed Human Epidermis Test Method)
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
Lithium tetrafluoroborate, anhydrous
EC Number:
EC Name:
Lithium tetrafluoroborate, anhydrous
Cas Number:
Molecular formula:
lithium tetrafluoroborate, anhydrous
Test material form:
solid: particulate/powder

In vitro test system

Test system:
human skin model
Source species:
Cell type:
non-transformed keratinocytes
Cell source:
other: not specified
Source strain:
not specified
Details on animal used as source of test system:
6.4.1 Specification
The test system is a commercially available EpiDermTM-Kit, procured by MatTek.
The EpiDermTM tissue consists of human-derived epidermal keratinocytes which have been cultured to form a multi-layered, highly differentiated model of the human epidermis. It consists of organized basal, spinous and granular layers, and a multi-layered stratum corneum containing intercellular lamellar lipid layers representing main
lipid classes analogous to those found in vivo. The EpiDermTM tissues are cultured on specially prepared cell culture inserts.
6.4.2 Origin
EpiDermTM tissues were procured from MatTek In Vitro Life Science Laboratories, Brati-slava.
Designation of the kit: EPI-200-SIT
Day of delivery: 15. May 2018
Batch no.: 28610
Control samples:
yes, concurrent negative control
Amount/concentration applied:
1 mg/mL
Duration of treatment / exposure:
23 hours and 25 minutes
Duration of post-treatment incubation (if applicable):
19 hours and 5 minutes
Number of replicates:

Results and discussion

In vitro

Irritation / corrosion parameter:
% tissue viability
Vehicle controls validity:
Negative controls validity:
Positive controls validity:
Remarks on result:
other: 2.9%
Other effects / acceptance of results:
The test item Lithium Tetrafluoroborate is considered as at least irritant to skin.
After the treatment, the mean value of relative tissue viability was reduced to 11.8%. This value is below the threshold for skin irritation (50%).
The optical density of the negative control was well within the required acceptability crite-rion of 0.8 ≤ mean OD ≤ 2.8.
The positive control has met the acceptance criterion too, for thus ensuring the validity of the test system.
Variation within replicates was within the accepted range for negative control, positive control and test item (required: ≤ 18%).
For these reasons, the result of the test is considered valid.

Applicant's summary and conclusion

Interpretation of results:
Category 2 (irritant) based on GHS criteria
The test item Lithium Tetrafluoroborate is considered as at least irritant to skin.