Thermal cracking oil from blends of rubber, fuel oils and paraffin waxes, steam-stripped

Toxicity to reproduction

Administrative data

Endpoint:

toxicity to reproduction

Remarks:

other: expert assessment

Type of information:

other: expert assessment

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: An expert assessment was performed using data derived from other light fuel oils, together with assessment of components known to be present in the UVCB.

Data source

Reference

Reference Type:

other: expert assessment

Title:

Unnamed

Year:

2014

Report date:

2014

Materials and methods

Test guideline

Qualifier:

no guideline available

Principles of method if other than guideline:

An expert assessment was performed using data derived from other light fuel oils, together with assessment of components known to be present in the UVCB.

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

Thermal cracking oil from blends of rubber, fuel oils and paraffin waxes, steam-stripped

EC Number:

941-627-8

Molecular formula:

Not Applicable

IUPAC Name:

Thermal cracking oil from blends of rubber, fuel oils and paraffin waxes, steam-stripped

Constituent 2

Reference substance name:

Not assigned

IUPAC Name:

Not assigned

Test material form:

other: liquid

Details on test material:

Name: Thermal cracking oil from blends of rubber, fuel oils and paraffin waxes, steam-stripped

Results and discussion

Results: P0 (first parental generation)

Effect levels (P0)

Dose descriptor:

NOEL

Effect level:

50 mg/kg bw/day

Based on:

test mat.

Sex:

male/female

Basis for effect level:

other: The maximum tolerated dose in almost all studies and reviews

Overall reproductive toxicity

Reproductive effects observed:

not specified

Any other information on results incl. tables

This is not an exhaustive review of all oil types considered similar to the UVCB substance Thermal cracking oil from blends of rubber, fuel oils and paraffin waxes, steam-stripped but the weight of evidence from review publications and other public sources suggest that there is a low risk of reproductive and developmental effects. There is no evidence across the range of oils reviewed to show that repeated dermal application leads to developmental toxicity at levels tolerated by parental rats.

Very limited data on oral or inhalation exposure that relate to reproductive or developmental endpoints have been found, but it is recognised that dermal exposure is not only the most relevant for human exposure.

The maximum tolerated dose in almost all studies and reviews is about 50 mg/kg/day, above which local dermal effects start to reduce the health of the adult animals; at dose levels in excess of 100 mg/kg/day, there are indications of reduced food intake and reduced weight and at higher dose levels, up to the maximum reported 1000 mg/kg/day, there is decreasing size of foeti and pups and in some cases, increase in the number of resorptions. The developmental observations are considered to be related to parental toxicity.

In the review of known components, it was not possible to find data on every specific component, but component types were assessed. Only toluene is known to have effects on development, and this is at high levels of exposure. Toluene is present at less than 1% in the substance to be registered and is not considered to influence the overall classification.

It is not considered acceptable to perform further reproduction toxicity tests on UVCB substance Thermal cracking oil from blends of rubber, fuel oils and paraffin waxes, steam-stripped in view of the wealth of data on similar light oils with high aromatic content.

Applicant's summary and conclusion

Conclusions:

The evidence indicates that the oil is unlikely to cause toxicity to the reproduction via the dermal route. The maximum tolerated dose in almost all studies and reviews is about 50 mg/kg/day, above which local dermal effects start to reduce the health of the adult animals. The observations on toxicity to the reproduction are considered to be related to systemic toxicity.

Executive summary:

An assessment of the toxicity to the reproduction of the substance was determined via an assessment of the components of the substance. Two methods of assessment have been used; one uses data relating to light distillate oils with similar composition and the second is to review know components of the UVCB substance to consider if there are any substance present thought likely to be toxic to reproduction. The evidence indicates that the oil is unlikely to cause reproductive toxicity via the dermal route. The maximum tolerated dose in almost all studies and reviews is about 50 mg/kg/day, above which local dermal effects start to reduce the health of the adult animals. The observations on toxicity to the reproduction are considered to be related to systemic toxicity.