Dibutyl adipate

アジピン酸ジブチル

CAS No. 105-99-7

Adipic acid dibutyl ester / Hexanedioic acid dibutyl ester

アジピン酸ジブチルエステル/ヘキサン二酸ジブチルエステル

Molecular formula: C14H26O4 Molecular weight: 258.40

ABSTRACT

Dibutyl adipate was studied in a 28-day repeat dose oral toxicity in rats at doses of 0, 20, 140, and 1000 mg/kg/day. Genotoxicity of Dibutyl adipate was also studied by the reverse mutation assay in bacteria and the chromosomal aberration test in cultured Chinese hamster lung (CHL/IU) cells.

No test substance-related changes were noted in terms of clinical observation, body weight, foods consumption, and the findings obtained from hematology tests, blood chemical examination, urinalysis, and pathological examination. The NOELs for the repeat dose toxicity are considered to be over 1000 mg/kg/day for both sexes.

Dibutyl adipate was not mutagenic in Salmonella typhimurium TA100, TA98, TA1535, TA1537 and Escherichia coli WP2 uvrA.

This chemical substance dose-dependently induced structural chromosomal aberrations at the low (0.7 mg/ml) and mid (1.3 mg/ml) concentrations in the presence of an exogenous metabolic activation system. Polyploid cells were not found.

SUMMARIZED DATA FROM THE STUDIES

1. Repeat Dose Toxicity1)

Purity:99.8%
Test species/strain :Rat/Crj:CD (SD)
Test method :Guidelines for 28-Day Repeat Dose Toxicity Test of Chemicals (Japan)
Route:Oral (gavage)
Doses:0 (vehicle), 20, 140, 1000 mg/kg/day
Number of animals:Males, 6 or 12/group (0, 1000 mg/kg/day)
Females, 6 or 12/group (0, 1000 mg/kg/day)
Vehicle :Olive oil
Administration period :Males and females, 28 days
Terminal kill :Days 29 or 43
GLP:Yes

Test results:
No test substance-related changes were noted in clinical observations, body weights, food consumption, and the findings obtained from hematology testing, blood chemical examination, urinalysis, and pathological examination. The NOELs for the repeat dose toxicity are considered to be over 1000 mg/kg/day for both sexes.

2. Genetic Toxicity

2-1 Bacterial test2)

Purity :99.8%
Test species/strains :S.typhimurium TA100, TA1535, TA98, TA1537
E. coli WP2 uvrA
Test method :Guidelines for Screening Mutagenicity Testing of Chemicals (Japan)
Procedures :Plate incorporation method
Solvent :DMSO
Positive controls :-S9, AF-2 (TA100, WP2, TA98) sodium azide (TA1535) and 9-aminoacridine (TA1537)
+S9, 2-aminoanthracene (all strains)
Doses :0, 312.5, 625, 1250, 2500, 5000 ug/plate
S-9 :Rat liver, induced with phenobarbital and 5,6-benzoflavone
Plates/test :3
Number of replicates:2
GLP :Yes

Test results:
Minimum concentration of test substance at which toxicity was not observed:
Toxicity was observed at a concentration of 5000 ug/plate without metabolic activation in TA100.
Genetic effects :
S. typhimurium TA100, TA1535, TA 98, TA1537
+?-
without metabolic activation:[ ][ ][*]
with metabolic activation:[ ][ ][*]
E. coli WP2 uvrA
without metabolic activation:[ ][ ][*]
with metabolic activation:[ ][ ][*]

2-2. Non-bacterial in vitro test (chromosomal aberration test)2)

Purity:99.8%
Type of cell used:Chinese hamster lung (CHL/IU) cells
Test method:Guidelines for Screening Mutagenicity Testing of Chemicals (Japan)
Solvent:Dimethyl sulfoxide
Positive controls:-S9, Mitomycin C
+S9, Cyclophosphamide
Doses:-S9 (continuous treatment): 0, 0.7, 1.3, 2.6 mg/ml
-S9 (short-term treatment): 0, 0.012, 0.023, 0.046 mg/ml
+S9 (short-term treatment): 0, 0.7, 1.3, 2.6 mg/ml
S-9:Rat liver, induced with phenobarbital and 5,6-benzoflavone
Plates/test:2
GLP:Yes

Test results:
Cytogenetic effects were seen as follows.
At the low (0.7 mg/ml) and mid (1.3 mg/ml) concentrations in the short term treatment with metabolic activation, 6.5 and 12.0% cells demonstrated structural chromosomal aberrations including gaps.
Lowest concentration producing cytogenetic effects in vitro:
with metabolic activation (short-term treatment): 0.7 mg/ml (clastogenicity)
Genotoxic effects:
clastogenicitypolyploidy
+?-+?-
without metabolic activation:[ ][ ][*][ ][ ][*]
with metabolic activation:[*][ ][ ][ ][ ][*]

1) The tests were performed by the Mitsubishi Chemical Safety Institute Ltd., 14 Sunayama, Hasaki-machi, Kashima-gun, Ibaraki, 314-02, Japan. Tel +81-479-46-2871 Fax +81-479-46-2874
2) The tests were performed by the Hatano Research Institute, Food and Drug Safety Center, 729-5 Ochiai, Hadano-shi, Kanagawa, 257, Japan. Tel +81-463-82-4751 Fax +81-463-82-9627


Dibutyl adipate

アジピン酸ジブチル


[CAS No. 105-99-7]

Adipic acid dibutyl ester / Hexanedioic acid dibutyl ester

アジピン酸ジブチルエステル/ヘキサン二酸ジブチルエステル

Molecular formula: C14H26O4 Molecular weight: 258.40

ABSTRACT

Dibutyl adipate was studied for oral toxicity in rats in an OECD preliminary reproduction toxicity screening test at doses 0, 100, 300 and 1000 mg/kg/day.

No animals were found dead in any groups. There were no adverse effects on general condition. Slight suppression of body weight gain was observed in male rats in the 1000 mg/kg group, while body weight change and food consumption of female rats in all dibutyl adipate-treated groups were comparable to those in the control group. Macroscopic findings at necropsy and histological findings for internal genitalia showed no abnormalities associated with the administration of dibutyl adipate. Kidney weights were increased in both sexes in the 1000 mg/kg group compared to the control group values.

There were no adverse effects of this compound on copulation, ovulation, fertility, parturition or lactation.

In the 1000 mg/kg group, pup weight on postnatal days 0 and 4 was slightly decreased, along with viability on postnatal day 4 as compared with those for the control group. However, there were no malformations which were related to the administration of dibutyl adipate.

In conclusion, the no observed effect level (NOEL) for toxicity of dibutyl adipate in parent animals as administered under the condition of the present study is considered to be 300 mg/kg/day, that for reproductive toxicity to be 1000 mg/kg/day, and that in offspring to be 300 mg/kg/day.

SUMMARIZED DATA FROM THE STUDIES

1. Reproductive/Developmental Toxicity 1)

Purity:99.0 and more wt%
Test species/strain:Rat/Crj:CD (Sprague-Dawley)
Test method:OECD Preliminary Reproduction Toxicity Screening Test
 Route:Oral (Gavage)
 Doses:100, 300, 1000 mg/kg/day
 Number of animals/group:Males, 13; Females, 13
 Vehicle:Corn oil
 Administration period:Males, 42 days,
Females, from 14 days prior to mating to day 3 of lactation
 Terminal killing:Males, day 43,
Females, day 4 of lactation
GLP:Yes

  Test results:

Copulation, ovulation, fertility, maintenance of pregnancy, and parturition and lactation were not affected by the test compound. Reproduction parameters (i.e., duration of gestation, number of corpora lutea, implantations and resorptions, litter size, and sex distribution) were comparable among all four groups including the controls. In the 1000 mg/kg group, pup weight on postnatal days 0 and 4 was slightly decreased along with viability on postnatal day 4. However, the morphological development of pups was comparable among all groups. Thus, the NOEL for reproduction in male and female rats (P generation) was 1000 mg/kg/day, and the NOEL for the F1 generation was 300 mg/kg/day.

<Maternal and paternal general toxicity>

No mortalities occurred in any compound-treated groups. There were no toxic effects of this compound on general condition of male or female animals. Slight suppression of body weight gain was observed in males in the 1000 mg/kg group, while body weight change in females and food consumption in male and female animals in all compound-treated groups were comparable to those in the controls. Macroscopic findings at necropsy and histological findings for the internal genitalia showed no abnormalities. Kidney weights were increased in males and females of the 1000 mg/kg group as compared to the control values. Thus, the NOEL for general toxicity of this compound in parent animals was suggested to be 300 mg/kg/day.

1)The tests were performed by the Hatano Research Institute, Food and Drug Safety Center, 729-5 Ochiai, Hadano-shi, Kanagawa, 257, Japan. Tel +81-463-82-4751 Fax +81-463-82-9627