2',3,4',5,7-pentahydroxyflavone

Skin irritation / corrosion

Administrative data

Endpoint:

skin irritation: in vitro / ex vivo

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2015

Report date:

2015

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 439 (In Vitro Skin Irritation: Reconstructed Human Epidermis Test Method)

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method B.46 (In Vitro Skin Irritation: Reconstructed Human Epidermis Model Test)

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

2',3,4',5,7-pentahydroxyflavone

EC Number:

207-542-9

EC Name:

2',3,4',5,7-pentahydroxyflavone

Cas Number:

480-16-0

Molecular formula:

C15H10O7

IUPAC Name:

2',3,4',5,7-pentahydroxyflavone

Constituent 2

Reference substance name:

Morin

IUPAC Name:

Morin

Test system

Vehicle:

unchanged (no vehicle)

Duration of treatment / exposure:

15 min exposure

Observation period:

42 hours post incubation

Results and discussion

In vitro

Results

Irritation / corrosion parameter:

other: other:

Remarks on result:

other:

Remarks:

Remarks: mean relative cell viability: 59 %. (migrated information)

Applicant's summary and conclusion

Interpretation of results:

not irritating

Remarks:

Migrated information Criteria used for interpretation of results: OECD GHS

Conclusions:

Non Irritant

Executive summary:

EpiSkinTM SM test of Morin has been performed to predict its irritation potential by measurement of its cytotoxic effect. Disks of EPISKIN (three units) were treated with test item and incubated for 15 minutes at room temperature. Exposure of test material was terminated by rinsing with PBS 1x solution. Epidermis units were then incubated at 37°C for 42 hours in an incubator with 5% CO2. The viability of each disk was assessed by incubating the tissues for 3 hours with MTT solution at 37°C in 5% CO2 protected from light. The precipitated formazan was then extracted using acidified isopropanol and quantified spectrophotometrically. As the test item has an intrinsic colour (yellow to brown), one additional chemical-treated tissue was used for the non-specific OD evaluation. SDS (5% aq.) and 1×PBS treated (three units / positive and negative control) epidermis were used as positive and negative controls respectively. For each treated tissue viability was expressed as a percentage relative to negative control. The test item is considered to be irritant to skin, if the mean relative viability after 15 minutes exposure and 42 hours post incubation is less or equal (≤) to 50% of the negative control. In this in vitro skin irritation test using the EPISKIN model, the test item Morin did not show significantly reduced cell viability in comparison to the negative control (mean relative viability: 59 %). Therefore the test item was considered to be non-irritant to skin. Positive and negative controls showed the expected cell viability values within acceptable limits. In this in vitro skin irritation test in the EPISKIN model with test item Morin the results indicated that the test item is Non Irritant (NI) [UN GHS: No Category].