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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

Toxicological information

Acute Toxicity: dermal

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Administrative data

Endpoint:
acute toxicity: dermal
Type of information:
migrated information: read-across based on grouping of substances (category approach)
Adequacy of study:
key study
Study period:
01 June 2012 - 30 August 2012
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: According to the ECHA guidance document “Practical guide 6: How to report read-across and categories (March 2010)”, the reliability was changed from RL1 to RL2 to reflect the fact that this study was conducted on a read-across substance.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2012
Report date:
2012

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 402 (Acute Dermal Toxicity)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Test type:
standard acute method
Limit test:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
Sodium octyl sulphate
EC Number:
205-535-5
EC Name:
Sodium octyl sulphate
Cas Number:
142-31-4
Molecular formula:
C8H18O4S.Na
IUPAC Name:
sodium octyl sulfate
Test material form:
other: solid

Test animals

Species:
rat
Strain:
Wistar
Sex:
male/female
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Details on strain: Wistar / Crl:WI (Han) SPF
- Source: Charles River Wiga GmbH, Sandhofer Weg 7, 97633 Sulzfeld, Germany
- Age at study initiation: approx. 9 weeks (males) and 13 weeks (females), respectively
- Weight at study initiation: mean (males): 273.0 ± 6.63g; mean (females): 225.8 ± 3.19g
- Fasting period before study: Feed was withdrawn from the animals at least 16 hours before administration, but water was available ad libitum.
- Housing: single housing in Makrolon cage, type III
- Diet (ad libitum): VRF1(P); SDS Special Diets Services, 67122 Altrip, Germany
- Water (ad libitum): Tap water
- Acclimation period: at least 5 days

ENVIRONMENTAL CONDITIONS
- Temperature: 22°C ± 3°C
- Humidity: 30 – 70%
- Air changes (per hr): approx. 10
- Photoperiod (hrs dark / hrs light): 12 / 12

Administration / exposure

Type of coverage:
semiocclusive
Vehicle:
water
Remarks:
deionized water
Details on dermal exposure:
TEST SITE
- Area of exposure: clipped epidermis (dorsal and dorsolateral parts of the trunk)
- % coverage: about 40 cm² (corresponds to at least 10% of the body surface)

REMOVAL OF TEST SUBSTANCE
- Washing: rinsing of the application site with warm water
- Time after start of exposure: 24 hours

TEST MATERIAL
- Amount(s) applied (volume or weight with unit): 5.71 mL/kg bw
- Concentration (if solution): 35 g/100 mL
- Constant volume or concentration used: yes
- For solids, paste formed: no
- Form of application: solution in deionized water
- Test item preparation and homogenization: For better handling the test item was ground with mortar and pestle. The test item preparation was produced shortly before application by stirring with a magnetic stirrer.
Duration of exposure:
24 hours
Doses:
2000 mg/kg bw
No. of animals per sex per dose:
5 animals/sex/dose
Control animals:
no
Details on study design:
- Duration of observation period following administration: 14 days
- Frequency of observations: A check for any dead or moribund animals was made at least once each workday.
- Necropsy of survivors performed: yes
- Other examinations performed:
Clinical signs: Recording of clinical signs several times on the day of administration, and at least once daily thereafter each workday for the individual animals.

Scoring of skin findings: Individual readings 30 – 60 minutes after removal of the semi-occlusive dressing (day 1), weekly thereafter and on the last day of observation.
The evaluation of skin reactions was performed according to Draize, J.H. (1959): Appraisal of the safety of chemicals in foods, drugs and cosmetics. The association of food and drug officials of the United States Austin, Texas.

Body weight: Individual body weights shortly before administration (day 0), weekly thereafter and on the last day of observation.

Pathology: Necropsy with gross-pathology examination on the last day of the observation period after sacrifice with CO2 in a chamber with increasing concentrations over time.

Results and discussion

Effect levels
Sex:
male/female
Dose descriptor:
LD50
Effect level:
> 2 000 mg/kg bw
Based on:
test mat.
Mortality:
No mortality occurred.
Clinical signs:
other: No systemic clinical signs were observed during clinical examination.
Gross pathology:
There were no macroscopic pathological findings in the animals sacrificed at the end of observation period.
Other findings:
Local effects:
No local effects were observed.

Any other information on results incl. tables

Body weight changes:

Individual body weight changes

Dose [mg/kg bw]

2000

Sex

male

Animal No.

1

2

3

4

5

mean

sd.

Body weight at study day [g]

 

 

 

 

 

 

 

0

274

267

282

266

276

273.0

6.63

7

278

284

301

281

285

285.8

8.93

14

307

304

330

299

308

309.6

11.93

 

Individual body weight changes

Dose [mg/kg bw]

2000

Sex

female

Animal No.

1

2

3

4

5

mean

sd.

Body weight at study day [g]

 

 

 

 

 

 

 

0

224

222

230

225

228

225.8

3.19

7

231

220

234

226

230

228.2

5.40

14

237

238

240

239

238

238.4

1.14

sd. = standard deviation

Applicant's summary and conclusion

Interpretation of results:
not classified
Remarks:
Migrated information Criteria used for interpretation of results: EU
Conclusions:
CLP: not classified
DSD: not classified