Benzyl propionate

Eye irritation

Administrative data

Endpoint:

eye irritation: in vivo

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

data is from experimental reports

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2014

Report date:

2014

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 405 (Acute Eye Irritation / Corrosion)

Principles of method if other than guideline:

The objective of the study was to assess the irritant and/or corrosive effects of “Benzyl propionate (CAS No. - 122-63-4)” on eye, when exposed by the ocular route in rabbits.

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Benzyl propionate

EC Number:

204-559-3

EC Name:

Benzyl propionate

Cas Number:

122-63-4

Molecular formula:

C10H12O2

IUPAC Name:

benzyl propanoate

Test material form:

liquid

Details on test material:

- Name of test material (as cited in study report):Benzyl propionate
- Molecular formula :C10H12O2
- Molecular weight :164.20 g/mol
- Substance type:Organic
- Physical state:Colourless Liquid

Specific details on test material used for the study:

- Name of test material (as cited in study report):Benzyl propionate
- Molecular formula :C10H12O2
- Molecular weight :164.20 g/mol
- Substance type:Organic
- Physical state:Colourless Liquid
- Batch number: Lot 1/04
- AI Content: 99.39 %
- Manufactured date: December, 2013
- Expiry Date : December, 2014
- Storage conditions: Tightly closed, in well-ventilated place. Keep away from ignition source
- Safety precautions: Take precautionary measures against static discharges. Kept away from source of ignition. Whenusing do not eat or drink, Aprons, caps, mask, gloves and goggles were used to ensure the health and safety of the Personnel.
- Disposal: The remaining unused test item was dispersed as per the internal SOPs

Test animals / tissue source

Species:

rabbit

Strain:

New Zealand White

Details on test animals or tissues and environmental conditions:

TEST ANIMALS
- Sex: Male
- Source:Procured from RABBI ROOF Animal Facility, A. P., India.
- Age at study initiation:4.5 to 5 Months (Approximately)
- Weight at study initiation:Minimum: 1.924 kg and Maximum: 2.038 kg (Prior to Treatment)
- Health Status: Healthy young adult.
- Housing:The animals were housed individually in stainless steel cages.
- Room Sanitation:The experimental room floor and work tops were swept and mopped with disinfectant solution every day.
- Cages and water bottle:All the cages and water bottles were changed minimum twice a week.
- Diet (e.g. ad libitum):All animals were provided conventional laboratory rabbit diet (Nutrivet Life Sciences, Pune) ad libitum.
- Water (e.g. ad libitum):Aqua guard filtered tap water was provided ad libitum.
- Acclimation period:Rabbits were acclimatised to the test conditions for a period of 6 days (Animal No.-1) and 9 days (Animal No. 2 and 3) prior to the application of the test item.

ENVIRONMENTAL CONDITIONS
- Temperature (°C):Minimum: 19.50 °C and Maximum: 22.20 °C
- Humidity (%):Minimum: 41.20 % and Maximum: 59.20 %
- Air changes (per hr): More than 12 changes per hour
- Photoperiod (hrs dark / hrs light): 12:12

Test system

Vehicle:

unchanged (no vehicle)

Controls:

yes, concurrent no treatment

Amount / concentration applied:

TEST MATERIAL
- Amount(s) applied (volume or weight with unit):0.1 ml
- Concentration (if solution):N/A

VEHICLE
- Amount(s) applied (volume or weight with unit):N/A
- Concentration (if solution):N/A
- Lot/batch no. (if required):N/A
- Purity:N/A

Duration of treatment / exposure:

24 hrs

Observation period (in vivo):

Animals were observed at 24 hours intervals for 72 hours.

Number of animals or in vitro replicates:

3 male rabbits

Details on study design:

REMOVAL OF TEST SUBSTANCE
- Washing (if done):The treated eye of rabbit was washed with normal saline.
- Time after start of exposure:24 hours

SCORING SYSTEM:N/A

TOOL USED TO ASSESS SCORE: Ophthalmoscope and fluorescent strips.

Results and discussion

In vivo

Results

Results 1

Irritation parameter:

cornea opacity score

Basis:

animal: #1,#2 and #3

Time point:

other: 24,48 and 72 hrs

Score:

0

Max. score:

3

Reversibility:

not specified

Remarks on result:

other: Untreated (Control Eye)

Results 2

Irritation parameter:

iris score

Basis:

animal: #1,#2 and #3

Time point:

other: 24,48 and 72 hrs

Score:

0

Max. score:

3

Reversibility:

not specified

Remarks on result:

other: Untreated (Control Eye)

Results 3

Irritation parameter:

conjunctivae score

Basis:

animal: #1,#2 and #3

Time point:

other: 24,48 and 72 hrs

Score:

0

Max. score:

3

Reversibility:

not specified

Remarks on result:

other: Untreated (Control Eye)

Results 4

Irritation parameter:

chemosis score

Basis:

animal: #1,#2 and #3

Time point:

other: 24,48 and 72 hrs

Score:

0

Max. score:

3

Reversibility:

not specified

Remarks on result:

other: Untreated (Control Eye)

Results 5

Irritation parameter:

cornea opacity score

Basis:

animal: #1,#2 and #3

Time point:

other: After 24, 48, 72 Hours

Score:

0

Max. score:

3

Reversibility:

not specified

Remarks on result:

other: For treated eye

Results 6

Irritation parameter:

iris score

Basis:

animal: #1,#2 and #3

Time point:

other: After 24, 48, 72 Hours

Score:

0

Max. score:

3

Reversibility:

not specified

Remarks on result:

other: For treated eye

Results 7

Irritation parameter:

conjunctivae score

Basis:

animal #1

Time point:

other: After 24 Hours

Score:

0

Max. score:

3

Reversibility:

not specified

Remarks on result:

other: For treated eyes

Results 8

Irritation parameter:

conjunctivae score

Basis:

animal #2

Time point:

other: After 48 Hours

Score:

0.67

Max. score:

3

Reversibility:

not specified

Remarks on result:

other: For treated eyes

Results 9

Irritation parameter:

conjunctivae score

Basis:

animal #3

Time point:

other: After 72 Hours

Score:

0

Max. score:

3

Reversibility:

not specified

Remarks on result:

other: For treated eyes

Results 10

Irritation parameter:

chemosis score

Basis:

animal: #1,#2 and #3

Time point:

other: After 24, 48, 72 Hours

Score:

0

Max. score:

3

Reversibility:

not specified

Remarks on result:

other: For treated eyes

Irritant / corrosive response data:

The following were observed in treated rabbits.
Observation at 1 hour after instillation of test item revealed: Cornea- No ulceration or opacity in all 3 animals; Area of Opacity- Zero in all the animals; Iris: Normal in all the animals. Conjunctivae - Some blood vessels definitely hyperaemic (injected) in all the animals; Chemosis: Some swelling above normal (includes nictating membranes) were observed in animal number 1 and 3 whereas animal number 2 was normal.
Observation at 24 hours after instillation of test item revealed: Cornea- No ulceration or opacity in all the animals; Area of Opacity- Zero in all the animals; Iris: Normal in all the animals. Conjunctivae - Some blood vessels definitely hyperaemic (injected) was observed in animal no. 2. Animal no. 1 and 3 recovered to normal; Chemosis: No swelling was observed in all the Animals.
At 24 hours observation the rabbits were examined for corneal epithelium cell damage using sodium fluorescein strips and noticed 0 % damage in Animal Nos 1, 2 and 3, respectively.
Observation at 48 and 72 hours after instillation of test item revealed: Cornea- No ulceration or opacity in all the animals; Area of Opacity- Zero in all the animals; Iris: Normal in all the animals. Conjunctivae - Some blood vessels definitely hyperaemic (injected) was observed in animal no. 3 at 48 hours which was recovered to normal at 72 hours observation whereas blood vessels were normal in Animal Numbers 1 and 3 at 48 and 72 hours observation; Chemosis: No swelling was observed in all the animals.
The individual mean score for Animal Nos. 1, 2 and 3 at 24, 48, 72 hours for Corneal opacity, iris, conjunctiva, chemosis were found 0.00, 0.00, 0.00, 0.00 ; 0.00, 0.00, 0.67, 0.00 and 0.00, 0.00, 0.00, 0.00, respectively.

Other effects:

Clinical Observation
No systemic toxicity was observed at treated rabbits during the experimental period.
Mortality
No mortality was observed during the observation period.
Body weight
All rabbits were weighed on test day 0 (prior to application) and at termination.
The body weights were marginally increased in all the animals when compared with pre-treatment body weight.

Any other information on results incl. tables

Table 1 : Individual Animal Eye Irritation Scores

 

In Treated area Dose:0.1 ml of test item                                                               Sex:Male

Animal Numbers	1					2					3
Application Side	Left					Left					Left
Eye Reactions	At hour					At hour					At hour
	*	1	24	48	72	*	1	24	48	72	*	1	24	48	72
Corneal Opacity	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Area of Opacity	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Iris	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Conjunctiva	0	1	0	0	0	0	1	1	1	0	0	1	0	0	0
Chemosis	0	1	0	0	0	0	0	0	0	0	0	1	0	0	0
Corneal Damage%	0					0					0

 

 

 

Dose:Untreated (Control Eye)                                                                       Sex:Male

Animal Numbers	1					2					3
Application Side	Left					Left					Left
Eye Reactions	At hour					At hour					At hour
	*	1	24	48	72	*	1	24	48	72	*	1	24	48	72
Corneal Opacity	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Area of Opacity	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Iris	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Conjunctiva	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
Chemosis	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0
Corneal Damage%	0					0					0

Key:*= Pre-exposure eye examination,h = Hour.

 

Table 1 Continued…

Eye Irritation Scores - Mean Values after 24, 48, 72 Hours (Treated eye)

Animal No.  Eye Reaction	1	2	3
Corneal Opacity	0.00	0.00	0.00
Iris	0.00	0.00	0.00
Conjunctiva	0.00	0.67	0.00
Chemosis	0.00	0.00	0.00

 

 Formula :

 

Mean Eye Irritation Score = Sum of the Individual Animal Score for eye reactionat 24, 48 and 72 hours

Number of the Observations (3)

 

 

Table 2 : Individual Animal Clinical Signs

 

Sex:Male

Animal No.	Days (Post application observation)
	0	1	2	3
1	1	1	1	1
2	1	1	1	1
3	1	1	1	1

Key:1 = Normal

 

Table 3: Individual Animal Body Weight

Sex :Male

Animal No.	Animal Body Weight (kg)
	Prior to application	At termination
1	1.950	1.978
2	2.038	2.128
3	1.924	1.962

Key:kg = Kilogram

Applicant's summary and conclusion

Interpretation of results:

not irritating

Conclusions:

Under the experimental conditions tested, eye irritation and reversibility of effects on eyes of rabbits was observed at 72 hours.
Hence under the experimental test conditions, Benzyl propionate (CAS No. - 122-63-4) is “Non Irritant” to New Zealand White Male rabbit eyes and is being classified as “Not Classified” as per the CLP regulation.

Executive summary:

Acute Ocular Irritation/corrosion Study of “Benzyl propionate(CAS No. -122-63-4)”in Rabbits, was performed in an OECD GLP laboratory (Sustainability Support Services (Europe) AB has the letter of access). This study was performed as per OECD guideline No. 405.

.

Rabbits free from injury of eye were selected for the study. The eyes of all the rabbits were examined 24 hours prior to treatment. One eye of each rabbit served as control and other as treated. Control eye was left untreated whereas;0.1 ml of test item (as such)was instilled in the other (treated) eye of rabbits.The eye was observed at 1, 24, 48, 72 hours after test item instillation.Ophthalmoscope was used for scoring of eye lesions.

In the initial test,0.1 ml of test itemwas applied into the conjunctival sac of the right eye of Animal No.1. The left eye of the rabbit served as the control. Animal No. 1 presented ocular lesions at 1 hour observation period. Hence the confirmatory test was conducted on additional two rabbits (Animal No. 2 and 3);0.1 ml of test itemwas instilled into the conjunctival sac of right eye and left eye served as the control. Ocular lesions were observed at 1, 24 and 48 hour in Animal Number 2 whereas in Animal Number 3 ocular lesions presented only at 1 hour observation period. Untreated eye of the treated rabbits was normal throughout the experimental period of 72 hours.

The following grading scores were observed in treated eye of tested rabbits.

Observation at 1 hour after instillation of test item revealed: Cornea-No ulceration or opacity in all 3 animals; Area of Opacity-Zero in all the animals;Iris:Normal in all the animals.Conjunctivae -Some blood vessels definitely hyperaemic (injected) in all the animals;Chemosis:Some swelling above normal (includes nictating membranes) were observed in animal number 1 and 3 whereas animal number 2 was normal. Observation at 24 hours after instillation of test item revealed: Cornea-No ulceration or opacity in all the animals; Area of Opacity-Zero in all the animals;Iris:Normal in all the animals.Conjunctivae -Some blood vessels definitely hyperaemic (injected) was observed in animal no. 2. Animal no. 1 and 3 recovered to normal;Chemosis:No swelling was observed in all the Animals. At 24 hours observation the rabbits were examined for corneal epithelium cell damage using sodium fluorescein strips and noticed 0 % damage in Animal Nos 1, 2 and 3, respectively. Observation at 48 and 72 hours after instillation of test item revealed: Cornea-No ulceration or opacity in all the animals; Area of Opacity-Zero in all the animals;Iris:Normal in all the animals.Conjunctivae -Some blood vessels definitely hyperaemic (injected) was observed in animal no. 3 at 48 hours which was recovered to normal at 72 hours observation whereas blood vessels were normal in Animal Numbers 1 and 3 at 48 and 72 hours observation;Chemosis:No swelling was observed in all the animals.

The individual mean score for Animal Nos. 1, 2 and 3at 24, 48, 72 hoursfor Corneal opacity, iris, conjunctiva, chemosis were found 0.00, 0.00, 0.00, 0.00 ; 0.00, 0.00, 0.67, 0.00 and 0.00, 0.00, 0.00, 0.00, respectively. Under the experimental conditions tested, eye irritation and reversibility of effects on eyes of rabbits was observed at 72 hours. 

Hence under the experimental test conditions,Benzyl propionate (CAS No. - 122-63-4) is “Non Irritant” to New Zealand White Male rabbit eyes and is being classified as “Not Classified” as per the CLP regulation.