Paraffin waxes and Hydrocarbon waxes, chloro, sulfochlorinated, saponified

Endpoint summary

Description of key information

LD50 oral rat > 2000 mg/Kg bw
LD50 dermal rat > 2000 mg/Kg bw

Key value for chemical safety assessment

Acute toxicity: via oral route

Link to relevant study records

Reference

Endpoint:

acute toxicity: oral

Type of information:

migrated information: read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Study period:

From June 7,2012 to June 29,2012

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: GLP compliant with international guideline

Qualifier:

according to guideline

Guideline:

EU Method B.1 bis (Acute Oral Toxicity - Fixed Dose Procedure)

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 420 (Acute Oral Toxicity - Fixed Dose Method)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test type:

fixed dose procedure

Limit test:

yes

Species:

rat

Strain:

Sprague-Dawley

Sex:

female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: Harlan Italy
- Age at study initiation:6-7 weeks old
- Weight at study initiation: 150 to 174 g
- Fasting period before study: overnight fast prior to dosing and a period of approximately 4 hours after dosing.
- Housing: 5 of one sex to a cage, in polisulphone solid bottomed cages measuring 59 x 38.5 x 20 cm.
- Diet: A commercially available laboratory rodent diet (4RF18, Mucedola S.r.l) will be offered ad libitum throughout the study.
- Water : Drinking water will be supplied ad libitum to each cage via water bottles
- Acclimation period: 5 days
- Health check: yes
- Water content: 15%

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22°C ± 2°C
- Humidity (%): 55% ± 15%
- Air changes (per hr):15 to 20 air changes per hour
- Photoperiod (hrs dark / hrs light):12 hours cycle dark/light

Route of administration:

oral: gavage

Vehicle:

corn oil

Details on oral exposure:

VEHICLE
- Concentration in vehicle: 10 ml/kg w

Doses:

5, 50, 300, 2000 mg/kg bw (based on active ingredient)

No. of animals per sex per dose:

4 females x doses

Control animals:

yes

Details on study design:

- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: twice daily
- Sings: Animals will be examined for signs of reaction to treatment on dosing, approximately 30 minutes, 2 and 4 hours after dosing on Day 1, then at least once daily for a total of 14 days.
- Body weight: Each animal will be weighed on the day of allocation to study, on the day of dosing (Day 1) and on Days 2, 8 and 15. Animals dying dur ing the study will be weighed at the time of death or when found.
- Necropsy of survivors performed: yes, Necropsy was carried out on all animals, (gross necropsy examination for both external and internal abnor malities, with particular attention to the gastro-intestinal tract). All abnormalities were recorded.
Animals in extremis and those that have completed the scheduled test period will be killed with carbon dioxide.
- Other examinations performed: gross examination including the opening of the cranial, thoracic and abdominal cavities and the examination of the major organs. The stomach and representative sections of the gastro-intestinal tract will be opened for examination.

Sex:

female

Dose descriptor:

LD0

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Sex:

female

Dose descriptor:

LD50

Effect level:

> 2 000 mg/kg bw

Based on:

test mat.

Mortality:

no mortality observed

Clinical signs:

other: Four additional female animals were treated at 2000 mg/kg. No mortality was observed in the main study. No clinical signs were noted during the observation period in 3 out of 4 animals treated. In the fourth animal (no. 91080023) clinical signs such as sa

Gross pathology:

No abnormalities were observed at the necropsy examination performed on termination of the observation period in the sighting study animal and in 3 out of 4 animals of the main study (those who did not show clinical signs). In the remaining animal of the main study, swollen abdomen was noted and at the internal examination, gas content and swelling were observed in the stomach, duodenum, jejunum, ileum, caecum and colon.

Interpretation of results:

practically nontoxic

Remarks:

Migrated information Criteria used for interpretation of results: EU

Conclusions:

The results indicate that the test item, has no toxic effect on the rat following oral administration of single doses of 2000 mg/kg. The lack of mortality demonstrates the LD50 to be greater than 2000 mg/kg body weight.

Executive summary:

The acute toxicity of Paraffin waxes and Hydrocarbon waxes C14-17, chloro, sulfochlorinated, low sulphonated, saponified was investigated following a single oral administration (10 mL/kg in corn oil) to the Sprague Dawley rat followed by a 14-day observation period. A sighting study was performed in which a single female animal was dosed at 2000 mg/kg. No mortality and no clinical signs were seen during the observation period. A main study was then performed on an additional 4 females which were dosed at 2000 mg/kg. No mortality occurred. No clinical signs considered related to the toxicity of the test item were noted during the observation period. The body weight changes observed in the animals were not remarkable with the exception of body weight loss observed in a single animal showing signs that could be unrelated to the toxicity of the test item. All animals were killed at the end of the observation period and subjected to necropsy examination. No abnormalities were observed at the necropsy examination performed on termination of the observation period in 4 out of 5 animals treated. In the remaining animal, swollen abdomen, gas content and swelling were observed in the gastrointestinal tract. These results indicate that the test item,

Paraffin waxes and Hydrocarbon waxes C14-17, chloro, sulfochlorinated, low sulphonated, saponified, has no toxic effect on the rat following oral administration of single doses of 2000 mg/kg. The lack of mortality demonstrates the LD50 to be greater than 2000 mg/kg body weight.

Endpoint conclusion

Endpoint conclusion:

adverse effect observed

Dose descriptor:

LD50

Value:

2 000 mg/kg bw

Quality of whole database:

Good GLP study available on a similar substance

Acute toxicity: via inhalation route

Endpoint conclusion

Endpoint conclusion:

no study available

Acute toxicity: via dermal route

Endpoint conclusion

Endpoint conclusion:

no adverse effect observed

Dose descriptor:

LD50

Value:

2 000 mg/kg bw

Quality of whole database:

Good GLP study available on a similar substance

Additional information

Two good GLP studies are available on a very similar substance, and both agreed in not showing any clinical sign and any toxicity at doses of 2000 mg/Kg bw for oral and dermal routes.

It can be assumed that the results will be the same also for Paraffin waxes and Hydrocarbon waxes, chloro, sulfochlorinated, saponified. Molecular weight will be usually higher or sulphonation degree, then hydrophylicity and/or salification proportions higher, leading to a better toxicological profile

Justification for selection of acute toxicity – oral endpoint
Study conducted on Paraffin waxes and Hydrocarbon waxes C14-17, chloro, sulfochlorinated, low sulphonated, saponified and has been used as read across for Paraffin waxes and Hydrocarbon waxes, chloro, sulfochlorinated, saponified. This study is conducted in accordance with GLP compliance with international guideline

Justification for selection of acute toxicity – dermal endpoint
Study conducted on Paraffin waxes and Hydrocarbon waxes C14-17, chloro, sulfochlorinated, low sulphonated, saponified and has been used as read across for Paraffin waxes and Hydrocarbon waxes, chloro, sulfochlorinated, saponified. This study is conducted in accordance with GLP compliance with international guideline

Justification for classification or non-classification

Substances can be allocated to one of four toxicity categories based on acute toxicity by the oral, dermal or inhalation route according to the numeric criteria shown in Table 3.1.1 of CLP Regulation. Acute toxicity values are expressed as (approximate) LD50 (oral, dermal) or LC50 (inhalation) values or as acute toxicity estimates (ATE). The limit value that can trigger to Classification is 2000 mg/Kg both for oral and dermal exposure pattern

No classification for acute toxicity oral is warranted under Regulation 1272/2008

No classification for acute toxicity dermal is warranted under Regulation 1272/2008

Categories Display