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Diss Factsheets

Toxicological information

Skin irritation / corrosion

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Administrative data

Endpoint:
skin irritation: in vivo
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Data is from experimental study report

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2014
Report date:
2014

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 404 (Acute Dermal Irritation / Corrosion)
Principles of method if other than guideline:
The objective of the study was to assess the irritant and/or corrosive effects of test chemical after dermal application on the intact skin in rabbits
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
Poly(oxy-1,2-ethanediyl),α-hydro-ω-hydroxy- Ethane-1,2-diol, ethoxylated
EC Number:
500-038-2
EC Name:
Poly(oxy-1,2-ethanediyl),α-hydro-ω-hydroxy- Ethane-1,2-diol, ethoxylated
Cas Number:
25322-68-3
Molecular formula:
(C2-H4-O)mult-H2-O
IUPAC Name:
Poly(oxy-1,2-ethanediyl),α-hydro-ω-hydroxy- Ethane-1,2-diol, ethoxylated
Details on test material:
- Name of test material (as cited in study report): Poly(oxy-1,2-ethanediyl),α-hydro-ω-hydroxy- Ethane-1,2-diol, ethoxylated
- Molecular formula :(C2-H4-O)mult-H2-O
- Molecular weight :44.0526 g/mol
- Substance type: organic
- Appearance: Colourless clear liquid
- Physical state: Liquid

Test animals

Species:
rabbit
Strain:
New Zealand White
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source:Procured from LIVEON BIOLABS PVT. LTD.
- Age at study initiation:3 to 3.5 Months (Approximately)
- Weight (Prior to Treatment):Minimum: 1.956 kg and Maximum: 2.398 kg (Prior to Treatment)
- Health Status : Healthy young adults rabbits were used for the study. Females were nulliparous and non pregnant.
- Housing:The animals were housed individually in stainless steel cages.
- Room Sanitation:The experimental room floor and work tops were swept and mopped with disinfectant solution every day.
- Cages and water bottle:All the cages and water bottles were changed minimum twice a week.
- Diet (e.g. ad libitum):All animals were provided conventional laboratory rabbit diet (Nutrivet Life Sciences, Pune) ad libitum.
- Water (e.g. ad libitum):Aqua guard filtered tap water was provided ad libitum.
- Acclimation period:Rabbits were acclimatised to the test conditions for a period of 8 days (Animal No.-1) and 10 days (Animal No.-2 and 3) prior to the application of the test item.

ENVIRONMENTAL CONDITIONS
- Temperature (°C):Minimum: 19.90 °C Maximum: 22.30 °C
- Humidity (%):Minimum: 52.80 % Maximum: 67.40 %
- Air changes (per hr):More than 12 changes per hour
- Photoperiod (hrs dark / hrs light):12:12

Test system

Type of coverage:
occlusive
Preparation of test site:
clipped
Vehicle:
unchanged (no vehicle)
Controls:
yes
Amount / concentration applied:
TEST MATERIAL
- Amount(s) applied (volume or weight with unit):0.5 ml
- Concentration (if solution):N/A

VEHICLE
- Amount(s) applied (volume or weight with unit):N/A
- Concentration (if solution):N/A
- Lot/batch no. (if required):N/A
- Purity:N/A
Duration of treatment / exposure:
4 hours
Observation period:
72 hours
Number of animals:
3 female rabbits
Details on study design:
TEST SITE
- Area of exposure:The dorsal lumbar region at contralateral sites.
- % coverage:Approximately 6 X 6 cm.
- Type of wrap if used:A porous gauze dressing and non-irritating tape (Micropore 3”).

REMOVAL OF TEST SUBSTANCE
- Washing (if done):The residual test item was removed by using cotton soaked in distilled water.
- Time after start of exposure:4 hour

SCORING SYSTEM:Draize Method

Results and discussion

In vivo

Resultsopen allclose all
Irritation parameter:
erythema score
Basis:
animal: #1 ,#2 and #3
Time point:
other: At 24, 48 and 72 hours
Score:
0.33
Max. score:
3
Reversibility:
no data
Remarks on result:
other: not irritating
Irritation parameter:
edema score
Basis:
animal: #1 ,#2 and #3
Time point:
other: At 24, 48 and 72 hours
Score:
0
Max. score:
3
Reversibility:
no data
Remarks on result:
other: not irritating
Irritant / corrosive response data:
The following were observed in treated rabbits.
The patch was removed after 4 hours and rabbits were observed for erythema and oedema at 1, 24, 48 and 72 hours after patch removal, evaluated and graded as per draize method.
Animal No.1 revealed Very slight erythema (barely perceptible) and no edema at 1 & 24 hours observation. Hence the confirmatory test was conducted on additional two animals (no. 2 and 3) to confirm the non irritant nature of the test item. Animal no. 1 recovered to normal at 48 hours observation period.
After 4 hours of exposure, animal no. 2 and 3 revealed very slight erythema (barely perceptible) and no edema at 1 & 24 hours observation. Animal no. 2 and 3 recovered to normal at 48 hours observation period.
The individual mean score at 24, 48 and 72 hours for animal nos. 1, 2 and 3 were 0.33, 0.33, 0.33 and 0.00, 0.00, 0.00, for erythema and oedema formation, respectively
Other effects:
Clinical Observation
No systemic toxicity was observed at treated rabbits during the experimental period. .

Mortality
No mortality was observed during the observation period.


Any other information on results incl. tables

 

Table 1

Skin Reaction

 

In Treated area Dose:0.5 ml of test item                                                                      Sex:Female

 

Animal

No.

Test

Treated

 area*

Erythema score

Oedema score

1h

24h

48h

72h

1h

24h

48h

72h

1

Initial

Left

1

1

0

0

0

0

0

0

2

Confirmatory

Right

1

1

0

0

0

0

0

0

3

Right

1

1

0

0

0

0

0

0

 

 

 

 

 

In Control areaDose:0.5 ml of distilled water                                                         Sex:Female

 

Animal

No.

Test

Treated area*

Erythema score

Oedema score

1h

24h

48h

72h

1h

24h

48h

72h

1

Initial

Right

0

0

0

0

0

0

0

0

2

Confirmatory

Left

0

0

0

0

0

0

0

0

3

Left

0

0

0

0

0

0

0

0

Key:h = Hour.

 

Erythema                                                                                                       Oedema

0 =No erythema                                                                                          0 =No oedema

1 = Very slight erythema (barely perceptible)
Table 1 Continued…

Mean Individual Animal Score at 24, 48 and 72 hours

 

                     Animal Number                  

Observations                      

1

2

3

Erythema

0.33

0.33

0.33

Oedema

0.00

0.00

0.00

 

 

 

 

 

 

 

 


Table 2

Individual Animal BodyWeight

Sex:Female

Animal

No.

Body Weight (kg)

Prior to Dosing

At termination

1

1.962

2.042

2

1.956

1.988

3

2.398

2.470

 

 

Table 3

Individual AnimalClinicalSigns

Sex:Female

Animal

No.

Days (Post dosing Observation)

0

1

2

3

1

1

1

1

1

2

1

1

1

1

3

1

1

1

1

Key: ./. = Not Applicable. 1 = Normal

Applicant's summary and conclusion

Interpretation of results:
other: not irritating
Conclusions:
The individual mean score at 24, 48 and 72 hours for Animal Nos. 1, 2 and 3 were 0.33, 0.33, 0.33 and 0.00, 0.00, 0.00, for erythema and oedema formation, respectively.Hence, the test chemical was regarded as non-Irritating to the skin of Female New Zealand White rabbits under the experimental conditions tested and is thus not classified as a skin irritant.
Executive summary:

Acute Dermal Irritation/corrosion Study of test chemical in Rabbits, . This study was performed as per OECD guideline No. 404. Three healthy young adult female rabbits were used for conducting acute dermal irritation study.Body weights were re­corded on day 0 (prior to application) and at termination.Rabbits with good intact skin were selected for the study. The hairs of all the rabbits were clipped at contralateral sites, approximately 24 hours prior to treatment.A dose of0.5 ml of test item (as such) wasappliedto the skin,over an area of approximately 6 x 6 cm clippedof haironone side of rabbits.The other untreated side was kept as control area and0.5 ml of distilled water was applied at this site. At the end of 4 hours, the gauze patch was removed and test item application site was wiped with water without altering the integrity of the epidermis. Initially, the test item was applied to the clipped area of skin of one rabbit. The test site was covered with gauze patch.After 4 hours of exposure, animal no. 1 revealed very slight erythema (barely perceptible)and no edema at 1, 24 hours observation.Hence the confirmatory test was conducted on additional two animals (no. 2 and 3)to confirm the non irritant nature of the test item. Animal no. 1 recovered to normal at 48 hours observation.After 4 hours of exposure, animal no. 2 and 3 revealed very slight erythema (barely perceptible)and no edema at 1, 24 hours observation which recovered to 48 hours observation.The patch was removed after 4 hours and animals wereobservedfor erythema and oedemaat 1, 24, 48 and 72 hours after patch removal, evaluatedand graded as per draize method. The individual mean score at 24, 48 and 72 hoursfor animal nos. 1, 2 and 3 were 0.33, 0.33, 0.33 and 0.00, 0.00, 0.00, for erythema and oedema formation, respectively. Hence, the test chemical was regarded as non-Irritating to the skin of Female New Zealand White rabbits under the experimental conditions tested and is thus not classified as a skin irritant.