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EC number: 290-754-9 | CAS number: 90218-76-1
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Endpoint summary
Administrative data
Description of key information
The subchronic oral toxicity of 1,2,4-Benzenetricarboxylic acid, decyl octyl ester was investigated in a well-conducted study in Sprague Dawley rats after daily oral administration at dose levels of 50, 200 and 500 mg/kg/day for 13 weeks and recovery from any treatment-related effects during a recovery period of 4 weeks. Signs of treatment-related effects of the test item were observed in males and females dosed at 200 and 500 mg/kg/day. These effects included some changes in clinical pathology parameters and some post mortem findings. The liver was identified as the main target organ on the basis of the organ weight data and histopathological findings. However, these changes were mild and fully reversible. The morphological aspect of the hepatocytic hypertrophy was consistent with proliferation of endoplasmic reticulum. As such, the hepatic effects were not considered to be adverse.
No significant changes were observed in the animals dosed at 50 mg/kg/day. It can be concluded that the No Observed Adverse Effect Level (NOAEL) for this study was 500 mg/kg/day.
Additionally two subacute 28-day oral toxicity studies were conducted which support this result.
Key value for chemical safety assessment
Repeated dose toxicity: via oral route - systemic effects
Endpoint conclusion
- Dose descriptor:
- NOAEL
- 500 mg/kg bw/day
- Study duration:
- subchronic
- Species:
- rat
Additional information
The subchronic oral toxicity of 1,2,4-Benzenetricarboxylic acid, decyl octyl ester was investigated in a well-conducted study in Sprague Dawley rats after daily oral administration at dose levels of 50, 200 and 500 mg/kg/day for 13 weeks and recovery from any treatment-related effects during a recovery period of 4 weeks. Signs of treatment-related effects of the test item were observed in males and females dosed at 200 and 500 mg/kg/day. These effects included some changes in clinical pathology parameters and some post mortem findings. The liver was identified as the main target organ on the basis of the organ weight data and histopathological findings. However, these changes were mild and fully reversible. The morphological aspect of the hepatocytic hypertrophy was consistent with proliferation of endoplasmic reticulum. As such, the hepatic effects were not considered to be adverse. No significant changes were observed in the animals dosed at 50 mg/kg/day. It can be concluded that the No Observed Adverse Effect Level (NOAEL) for this study was 500 mg/kg/day. In the study there were not seen any indications for reproductive effects, those investigated were spermatogenic staging, oestrus cycle, weights of ovaries and testes, including microscopic and macroscopic observations.
Two subacute oral toxicity studies in rats were conducted with the test substance which support the result of the subchronic study.
In one subacute oral toxicity study in rats some treatment-related effects were evident in males and to a minor extent in females at the high dose level of 1000 mg/kg/d. The adrenals were identified as the main target organs, based on the post-mortem examination. The observed effects were completely reversible over a 2-week recovery period in the high dose animals. Only mild effects were observed in the animals (essentially males) dosed at 300 mg/kg/d, therefore this dose is expected to be NOAEL. No effects were observed at the low dose level (NOEL = 100 mg/kg/d). In the subacute 28 -day study, a dose of 500 mg/kg bw/d was not used but adverse effects were seen at 1000 mg/kg bw/d (LOAEL). Therefore for repeated dose toxicity, it can be concluded in summary that the NOAEL is 500 mg/kg bw/d.
In another subacute oral study the test item was well tolerated in CD® [Crl:CD®(SD)] rats as a once daily oral gavage for 28 days at dose levels of 0, 100, 300, and 1000 mg/kg/day. Males given 1000 mg/kg/day and females given 100 or 300 mg/kg/day had lower body weights, decreased body weight gain, and/or decreased food consumption. Increases in ALT, AST, and ALP were noted in animals given 1000 mg/kg/day which correlated with hepatocellular hypertrophy. In addition, adrenal gland enlargement in animals given 1000 mg/kg/day and erythrophagocytosis in the medullary sinus of the mesenteric lymph node in all treated groups was observed, and all were considered test article-related. However, none of these findings were considered adverse. Therefore, the no-observed adverse- effect-level (NOAEL) in rats given the test item daily for 28 days is 1000 mg/kg/day.
Justification for classification or non-classification
The results of the repeated dose oral toxicity studies show that 1,2,4-Benzenetricarboxylic acid, mixed decyl and octyl triesters does not warrant classification according to Regulation (EC) No 1272/2008.
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