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EC number: 943-537-4 | CAS number: -
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Acute Toxicity: dermal
Administrative data
- Endpoint:
- acute toxicity: dermal
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 21 January 2015 to 12 February 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 015
- Report date:
- 2015
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 402 (Acute Dermal Toxicity)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method B.3 (Acute Toxicity (Dermal))
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Test type:
- fixed dose procedure
- Limit test:
- yes
Test material
- Reference substance name:
- Reaction product of C16-22, even, C18-rich, unsaturated and saturated triglycerides with, N-(2-hydroxypropylamine)
- Molecular formula:
- Too Complex
- IUPAC Name:
- Reaction product of C16-22, even, C18-rich, unsaturated and saturated triglycerides with, N-(2-hydroxypropylamine)
- Details on test material:
- - Physical state: Dark yellow viscous liquid
- Analytical purity: 100 %
- Expiration date of the lot/batch: 12 June 2016
- Storage condition of test material: Room temperature in the dark
Constituent 1
Test animals
- Species:
- rat
- Strain:
- Wistar
- Sex:
- male/female
- Details on test animals or test system and environmental conditions:
- ANIMALS AND ANIMAL HUSBANDRY
- Five male and five femal Wistar (RccHan: WIST) strain rats were supplied by Harlan Laboratories Ltd, Oxon, UK.
- The animals were randomly allocated to cages on receipt.
- Female animals were nulliparous and non-pregnant.
- After an acclimatisation period of at least 5 days, animals were selected at random and given a number unique within the study by indelible ink-marking on the tail and recording of the number on a cage card.
- Animals weighed at least 200 g and were 8 to 12 weeks of age at the start of the study.
- The weight variation did not exceed ± 20 % of the mean weight for each sex.
- Animals were housed in suspended solid-floor polypropylene cages furnished with woodflakes.
- The initial two animals were housed individually throughout the study.
- The further group of eight animals (four male and four female) were housed individually during the 24 hour exposure period and in groups of four, by sex, for the remainder of the study.
- Free access to mains drinking water and food (2014C Teklad Global Rodent diet supplied by Harlan Laboratories Ltd, Oxon, UK) was allowed throughout the study.
- The diet, drinking water and bedding were routinely analysed and were considered not to contain any contaminants that could reasonably be expected to affect the purpose or integrity of the study.
- Temperature and relative humidity were set to achieve limits of 19 to 25 °C and 30 to 70 % respectively.
- The rate of air exchange was at least fifteen changes per hour.
- Lighting was controlled by a time switch to give 12 hours continuous light (06:00 to 18:00) and 12 hours darkness.
- The animals were provided with environmental enrichment items which were considered not to contain any contaminant of a level that might have affected the purpose or integrity of the study.
Administration / exposure
- Type of coverage:
- semiocclusive
- Vehicle:
- unchanged (no vehicle)
- Details on dermal exposure:
- PROCEDURE
- On the day before treatment, the back and flanks of each animal were clipped free of hair.
- Using available information on the toxicity of the test item, one male and one female rat were initially treated with the test item at a dose level of 2000 mg/kg.
- The calculated volume of test item, as received, waas applied as evenly as possible to an area of shorn skin (approximately 10 % of the total body surface area) using a graduated syringe.
- A piece of surgical guaze was placed over the treatment area and semi-occluded with a piece of self-adhesive bandage.
- The animals were caged individually throughout the study.
- Shortly after dosing the dressings were examined to ensure they were securely in place.
- After the 24 hour contact period the bandage was carefully removed and the treated skin and surrounding hair wiped with cotton wool moistened with suitable vehicle to remove any residual test item. Due to technician error, the vehicle used was not specified in the data, although based on the vehicle determination record, it is reasonable to assume that arachis oil BP was used.
- As no mortalities were noted, a further group of animals (four males and four females) were similarly treated with test item at a dose level of 2000 mg/kg bw .
- After the 24 hour contact period, the bandages were carefully removed and the treated skin and surrounding hair wiped with cotton wool moistened with arachis oil BP to remove any residual test item.
- The four males and four female animals were returned to group housing for the remainder of the test period. - Duration of exposure:
- 24 hours
- Doses:
- 2000 mg/kg bw
- No. of animals per sex per dose:
- 5 males and 5 females
- Control animals:
- no
- Details on study design:
- TEST FORMULATION AND EXPERIMENTAL PREPARATION
- The test item was weighed out according to each animal's individual body weight and applied undiluted as supplied.
- The absorption of the test item was not determined. - Statistics:
- - Data evaluations included the relationsip, if any, between exposure of the animal to the test item and the incidence and severity of all abnormalities including behavioural and clinical observations, gross lesions, body weight changes, mortality and other toxicological effects.
- Using the mortality data obtained, and estimate of the acture dermal median lethal dose (LD50) of the test item was made.
Results and discussion
Effect levels
- Sex:
- male/female
- Dose descriptor:
- LD50
- Effect level:
- > 2 000 mg/kg bw
- Based on:
- test mat.
- Mortality:
- No animal deaths took place.
- Clinical signs:
- other: No signs of systemic toxicity were noted during the observation period.
- Gross pathology:
- - Individual necropsy findings are given in Table 5 (attached).
- No abnormalities were noted at necropsy. - Other findings:
- DERMAL REACTIONS
- Individual dermal reactions are shown in Tables 2 and 3 (attached).
- No signs of dermal irritation were observed.
Applicant's summary and conclusion
- Conclusions:
- The acute dermal median lethal dose (LD50) of the test item in the Wistar strain rat was found to be greater than 2000 mg/kg body weight.
- Executive summary:
GUIDELINE
OECD Guidelines for the Testing of Chemicals No 402 "Acute Dermal Toxicity" (adopted 24 February 1987) and Method B3 Acute Toxicity (Dermal) of Commission Regulation (EC) No 440/2008.
METHOD
Initially, two animals (one male and one female) were given a single, 24 hour, semi-occluded dermal application of the test item to intact skin at a dose level of 2000 mg/kg bw. Based on the results of the initial test, a further group of eight animals (four males and four females) were treated similarly. Clinical signs and body weight development were monitored during the study. All animals were subjected to gross necropsy.
RESULTS
Mortality: No animal deaths took place during the study.
Clinical observations: No signs of systemic toxicity were observed.
Dermal irritation: No signs of dermal irritation were observed.
Body weight: All animals showed expected gains in body weight.
Necropsy: No abnormalities were noted at necropsy.
CONCLUSION
The acute dermal median lethal dose (LD50) of the test item in the Wistar strain rat was found to be greater than 2000 mg/kg body weight.
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