Octyl acetate

Endpoint summary

Additional information

Short-term toxicity to fish:

Predicted model data and experimental study results of short term toxicity to fish for the target chemical Octyl acetate (CAS No. 112-14-1) with respective read across were reviewed to summarize the following information:

 

In key study the 96 hrs aquatic toxicity study was predicted to assess toxic effects of the test compound Octyl acetate (CAS No. 112-14-1) and the result were predicted (SSS QSAR Prediction model, 2016). The study was based on the effects of the test compound on Danio rerio fish in a static fresh water system. The predicted data suggests the lethal concentration (LC50) for the test compound was estimated to be 43.439624786 mg/l on the basis of mortality effect.     

  

Other predicted model (ECOSAR v1.1 model, 2016) for target compound Octyl acetate indicate the study which is based on the effects of the test compound on fish in fresh water system. The predicted data suggests the lethal concentration (LC50) was estimated to be 3.346 mg/l on the basis of mortality effect.

 

Thus, based on above predicted lethal concentrations, it can be concluded that test chemical Octyl acetate considered as toxic to fish and thus can be classified as aquatic chronic category 2 and 3. Since the chemical Octyl acetate is readily biodegradable in nature it is considered as non-toxic to fish and thus cannot be classified as hazardous as per the CLP criteria.

Read across 2-(2-ethoxyethoxy) ethyl acetate (Cas no. 112-15-2) from experimental study which is carried out in UERL laboratory; 2016 indicate that Based on nominal concentrations, the median lethal concentration LC-50 (96 h) for CAS No. 112-15-2 onDanio reriowas found to be > 100 mg/L.

LC0 (96 hours) (highest concentration at which no mortality was observed) = 100 mg/L

LC50 (96 hours) Experimental = > 100 mg/L

LC100 (96 hours) (lowest concentration at which 100% mortality was observed) = No mortality

 

Experimental study (Journal of Hazardous Materials, 1 (1975/77) 303-318; 1977) for read across Butyl acetate (Cas no. 123-86-4) Indicate the short term fish toxicity bioassay the lethal concentration (LC50) of test substance Butyl acetate for saltwater fish species Menidia beryllina was examine. In experiment 0,100,132,180,240 and 320 mg/l concentrations was used with experimental condition 55 mg/L CaCO3 hardness,7.6 to 7.9 pH and 20 deg.C test temp.in static saltwater.During experiment the lethal concentration was observed to be 185 mg/l with exposure period 96 hrs. and on the basis of mortality effects. Thus Based on the lethal concentration it is concluded that the test substance Butyl acetate was non toxic to fish and not consider for the aquatic classification as per the CLP criteria.

 

Whereas other experimental study for read across chemical 2-ethoxyethyl acetate (Cas no. 111-15-9) indicates in short term fish toxicity the aquatic toxicity of test substance 2-ethoxyethyl acetate was determine on test species Leuciscus idus,the lethal concentration (LC50) was determined as 107 mg/l for exposure period 96 hrs. (ECOTOX database; 2016)

Thus, based on above results, it can be concluded that the target chemical Octyl acetate (CAS No. 112-14-1) can be considered as non-toxic to fish and thus cannot be classified as hazardous as per the CLP criteria.

Short term toxicity to aquatic invertebrates:

Various predicted studies for theOctyl acetate (112-14-1) and read across chemicalwere reviewed to summarize the following information: 

48 hrs aquatic toxicity studies (SSS QSAR prediction model, 2016) were conducted to assess toxic effects ofOctyl acetate (112-14-1)and the results were predicted. The study was based on the effects of the test compound on the Daphnia magna in a static fresh water system. The predicted data suggests the effective concentration (EC50) for theOctyl acetate (112-14-1)wasestimated to be 38.154483795 mg/Lon the basis of intoxication at 20 degree C. As theOctyl acetate (112-14-1)wasconsidered being hazardous to aquatic invertebrates since the chemical was readily biodegradable and can be considered to be not classified as per the CLP regulations.

 

48 hrs aquatic toxicity studies(EPI suite, ECOSAR version 1.1, 2016) were conducted to assess toxic effects of the Octyl acetate (112-14-1) and the results were predicted. The study was based on the effects of the test compound on the Daphnia magna in a static fresh water system. The predicted data suggests the lethal concentration (LC50) for Octyl acetate (112-14-1)wasestimated to be 2.246mg/l.As the Octyl acetate (112-14-1)wasconsidered being hazardous to aquatic invertebrates since the chemical was readily biodegradable and can be considered to be not classified as per the CLP regulations.

 

 

A study was performed in read across chemical 2-(2-ethoxyethoxy) ethyl acetate (112-15-2) (Abitec laboratory) which is 50-60% structural similarity.Determination of the inhibition of the mobility of daphnids was carried out with the substance 2-(2-ethoxyethoxy) ethyl acetate (112-15-2) according to OECD Guideline 202.The test substance was tested at the concentrations 0, 6, 12.5, 25, 50, 100 and 200 mg/L. Effects on immobilisation were observed for 48 hours.The median effective concentration (EC50) for the test substance, 2-(2-ethoxyethoxy)ethyl acetate, in Daphnia magna was determined to be 136.8 mg/L for immobilisation effects.

This value indicates that the substance is not likely to be hazardous to aquatic invertebrates as per the CLP criteria.

 

Another study of read across chemical name Ethylene glycol monoethyl ether acetate (112-15-9) which is 50-60% structural similarity short term toxicity to aquatic invertebrates was performed in daphnia magna following OECD guideline 202. The test was performed for 48 hrs, after that the EC 50 value of Ethylene glycol monoethyl ether acetate (112-15-9) was determined to be 200 mg/l.Based on the result, the Ethylene glycol monoethyl ether acetate was considered to be not classified as per the CLP regulations.

On the basis of results for toxicity to aquatic invertebrates from target, read across chemical2-(2-ethoxyethoxy) ethyl acetate (112-15-2) andEthylene glycol monoethyl ether acetate (112-15-9) which are 50-60 % structurally similar, it can be considered that the Octyl acetate (112-14-1) is not likely to be toxic to aquatic invertebrates at environmentally relevant concentrations and can be considered to be not classified as per the criteria of CLP regulation.

Toxicity to microorganisms:

Predicted model data and Experimental study result of toxicity to micro organism for the target chemical Octyl acetate (CAS no. 112-14-1) were reviewed to summarize the following information:

 

From predicted model the 48 hrs aquatic toxicity study was predicted to assess toxic effects of the test compound Octyl acetate (CAS no. 112-14-1) and the result were predicted (SSS QSAR Prediction model, 2016). The study was based on the effects of the test compound on Tetrahymena pyriformis micro organism in a static fresh water system. The predicted data suggests the Inhibition growth concentration (IGC50) for the test compound was estimated to be 146.613647461 mg/l on the basis of growth inhibition effect. Since the test chemical is readily biodegradable in nature it can be considered as the test substance Octyl acetate has no concern for aquatic toxicity.     

 

And read across Butyl acetate (Cas no. 123-86-4) in experimental study indicate that the toxicity study for micro organism Uronema parduczi (Ciliate) was conduct for exposure period 20 hrs. the effect concentration was observed to be 574 mg/l on the basis of population effect. (ECOTOX database; 2016)

 

 Thus based on the above available studies it is concluded that the test substance Octyl acetate (CAS no. 112-14-1) have no concern for micro organism toxicity.

Toxicity to aquatic algae and cyanobacteria

Predicted data for the target chemical Octyl acetate (CAS No. 112-14-1) and the study for its read across substance were reviewed to summarize the following information:

 

72 hrs aquatic toxicity study was predicted to assess toxic effects of the test compound Octyl acetate (CAS no. 112 -14 -1) and the result were predicted (SSS QSAR Prediction Model, 2016). The study was based on the effects of the test compound on Desmodesmus subspicatus in a static fresh watersystem. The predicted data suggests the effective concentration (EC50) for the test compound Octyl acetate (CAS no. 112 -14 -1) was estimated to be 264.79 mg/l on the basis of growth rate. Thus, based on this value, it can be concluded that the test chemical Octyl acetate can be considered as non-toxic to aquatic organisms and thus cannot be classified as hazardous as per the CLP criteria.

 

Based on the QSAR prediction done using the EPI Suite ECOSAR version 1.10 (EPI Suite, 2017), the 96 hours EC50 was estimated to be 3.339 mg/l on green algae for substance Octyl acetate (CAS no. 112 -14 -1) with growth inhibition effects. Thus, based on this value, it can be concluded that the test chemical Octyl acetate can be considered as toxic to aquatic organisms and thus can be classified as aquatic chronic category 2. Since the test chemical is readily biodegradable in nature, chemical Octyl acetate can be considered as non-toxic to aquatic organisms and thus cannot be classified as hazardous as per the CLP criteria.

 

Freshwater algal growth inhibition test was carried out on Desmodesmus subspicatus with the read across substance 2-(2-ethoxyethoxy)ethyl acetate according to OECD Guideline 201 (ABITEC Study report, Report no. 314/16, Sustainability Support Services (Europe) AB, 2016). Test solutions of 100 mg/L was prepared by dissolving the yellow oily liquid in OECD growth medium and the solution was kept for 10 minutes in ultrasonic bath. The read across substance was dissolved in DMSO and tested at the concentration 0 and 100 mg/L. Effects on the growth rate of the organism were studied. The test was performed under static conditions in a static fresh water system at a temp. of 23±2°C. Initial cell density of test organism used was 5x10(3) cells/ml. Determination of cell counting involve the use of electronic particle counter. The median effective concentration (EC50) for the read across substance, 2-(2-ethoxyethoxy)ethyl acetate, in Desmodesmus subspicatus was determined to be >100 mg/L on the basis of effects on growth rate in a 72 hour study. Thus, based on this value, read across chemical 2-(2-ethoxyethoxy)ethyl acetate can be considered as non-toxic to aquatic organisms and thus cannot be classified as hazardous as per the CLP criteria.

 

The effect of read across substance 2-(2-ethoxyethoxy)ethyl acetate, (CAS No. 112-15-2) was studied on the growth of fresh water green alga Chlorella vulgaris (UERL Study report, Sustainability Support Services (Europe) AB, Report no. 112-15-2/01/2016/AT, 2016). The study was conducted following OECD guideline 201- Alga growth inhibition test. The test concentration chosen for the study were 6.25mg/l, 12.5mg/l, 25mg/l, 50mg/l, 100 mg/l and 200 mg/l and these were prepared using stock solution of the read across substance using de-ionized water. The green alga was exposed to the test concentration for a period of 72 hours to observe average specific growth rate and % growth inhibition under the effect of read across substance. EC50 calculated through probit analysis was observed to be 110.158 mg/l. Thus, based on this value, read across chemical 2-(2-ethoxyethoxy)ethyl acetate can be considered as non-toxic to aquatic organisms and thus cannot be classified as hazardous as per the CLP criteria.

 

Short term toxicity to algae study was carried out for 72 hrs (CAS no. 111-15-9) (J-CHECK, 2016). The study was performed according to OECD guideline 201 (Algal, Growth Inhibition Test). The study was based on the effects of the read across compound 2 -Ethoxyethyl acetate on algae in a static fresh water system. Based on effect on AUG and growth rate of algae, the 72 hr EC50 and NOEC value was determined to be > 1000 and 1000 mg/l, respectively. Thus, based on EC50 value, it can be concluded that the substance 2 -Ethoxyethyl acetate can be considered as non-toxic to aquatic organisms and thus cannot be classified as hazardous, as per the CLP criteria.

 

Based on the overall reported results for target and its read across substance, it can be concluded that the test substanceOctyl acetatecan be considered as non-toxic to aquatic organisms and thus cannot be classified as hazardous as per the CLP criteria.