1,1'-(1-phenylethane-1,1-diyl)bis[4-(heptyloxy)benzene]

Acute Toxicity: dermal

Administrative data

Endpoint:

acute toxicity: dermal

Type of information:

experimental study

Adequacy of study:

key study

Study period:

23 September 2016 - 11 October 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2016

Report date:

2016

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 402 (Acute Dermal Toxicity)

Deviations:

yes

Remarks:

Deviations from the minimum level of daily mean relative humidity occurred. The study integrity was not adversely affected by the deviation.

GLP compliance:

yes

Test type:

fixed dose procedure

Limit test:

yes

Test material

Test material information

Constituent 1

Reference substance name:

1,1'-(1-phenylethane-1,1-diyl)bis[4-(heptyloxy)benzene]

EC Number:

811-683-7

Cas Number:

1799707-26-8

Molecular formula:

C34H46O2

IUPAC Name:

1,1'-(1-phenylethane-1,1-diyl)bis[4-(heptyloxy)benzene]

Specific details on test material used for the study:

Purity: 99.56%

Test animals

Species:

rat

Strain:

Wistar

Remarks:

Crl:WI (Han) (outbred, SPF-Quality)

Sex:

male/female

Details on test animals or test system and environmental conditions:

Young adult animals (approx. 10 weeks old) were selected. Body weight variation did not exceed +/- 20% of the sex mean. Environmental controls for the animal room were set to maintain 18 to 24°C, a relative humidity of 40 to 70%, at least 10 air changes/hour, and a 12-hour light/12-hour dark cycle. Any variations to these conditions were maintained in the raw data and had no effect on the outcome of the study.

Administration / exposure

Type of coverage:

semiocclusive

Vehicle:

unchanged (no vehicle)

Duration of exposure:

24 hours

Doses:

2000 mg/kg bw (single dose on Day 1)

No. of animals per sex per dose:

5 males and 5 females

Control animals:

not required

Results and discussion

Effect levels

Key result

Sex:

male/female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Remarks on result:

other: Not classified and has no obligatory labelling requirement for acute dermal toxicity according to GHS.

Mortality:

No mortality occurred.

Clinical signs:

Lethargy, chromodacryorrhoea of the snout, ptosis, flat posture, restless behaviour and/or piloerection were noted for all animals on Days 1 and/or 2. General erythema of the treated skin was noted for two male animals on Day 2 only.

Body weight:

The changes noted in body weight gain in males and females were within the range expected for rats used in this type of study and were therefore considered not indicative of toxicity.

Gross pathology:

No abnormalities were found at macroscopic post mortem examination of the animals.

Applicant's summary and conclusion

Interpretation of results:

GHS criteria not met

Conclusions:

The dermal LD50 value of the susbtance in Wistar rats was established to exceed 2000 mg/kg body weight. Based on these results, the substance does not have to be classified and has no obligatory labelling requirement for acute dermal toxicity according to GHS.

Executive summary:

In an acute dermal toxicity study the substance was administered to Wistar rats (5 animals/sex) by dermal application at a dose level of 2000 mg/kg bw (single administration). There were no mortalities or signs of clinical toxicity, mean body weight gain was comparable with the control animals and no abnormalities found at macroscopic post-mortem examination.The dermal LD50 of the susbtance in Wistar rats was established to exceed 2000 mg/kg bw.