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Description of key information

Appearance:

On the basis of physical observation the chemical 1-(1-naphthyl)ethanone is observed to be clear pale yellow colored liquid in appearance.

Freezing point:

The Freezing point determination of 1'-acetonaphthone (CAS No.941-98-0) was done using crushed ice and salt. No freezing was observed up to -13.65 °C. Hence, the freezing point was inferred to be less than -13.65 °C at 979.4 hPa.

Boiling point:

The boiling point determination of 1-(1-naphthyl)ethanone (CAS No. 941-98-0) was done following OECD Guideline 103 and according to the method of Siwoloboff. The test was conducted in replicates and mean boiling point was determined to be 297.6°C at 979.6 hPa.

Density:

The density of substance 1-(1-naphthyl)ethanone (CAS No. 941-98-0)was determined following OECD Guideline 109 and according to the IS 4730 : 1994 (Reaffirmed 2010) – Method for Determination of Density of Liquids (First Revision) using glass pyknometer .The mean density of substance 1-(1-naphthyl)ethanone was determined to be 1.1144g/cm³ at 20°C and 972.3 hPa.

Particle Size Distribution:

The study does not need to be conducted because the test chemical is marketed or used in a non- solid or granular form.

The chemical 1-(1-naphthyl)ethanone is observed to be clear pale yellow colored liquid in appearance.

Hence this endpoint was considered for waiver.

Vapour Pressure:

Data from handbooks, authoritative and modeling databases suggests that the experimental vapour pressure of 1-acetonapthone at 25 deg C was 5.23E-02 Pa.

Partition Coefficient:

The partition Coefficient n-octanol/water of test chemical 1'-acetonaphthone (CAS No. 941-98-0) was determined by the Reverse Phase High Performance Liquid Chromatographic method according to OECD Guideline No. 117 for testing of Chemicals. A test item solution was prepared by accurately measuring 5 μL of test item and diluting with acetonitrile up to 10 mL. Thus, the test solution concentration was 560 mg/l. The pH of test substance was 6.0. The reference substances were chosen according to estimated Pow range of the test substance and generalized calibration graph was prepared.. The reference substances were Phenol, Biphenyl, Benzyl Benzoate, 1,2,4-Trichlorobenzene, 2,3-Dichloroaniline, Diphenylamine, Cinnamyl alcohol, 4-Methylbenzyl alcohol, Cinnamic Acid, Dodecanoic acid, n-Butylbenzene, Naphthalene, Diphenyl ether, DDT having log Pow value ranging from 1.5 to 6.5. The Log Pow value of the test chemical 1'-acetonaphthone was determined to be 3.368 ± 0.001 dimensionless at 25°C.

Water Solubility:

The water solubility determination of test item 1'-acetonaphthone (CAS No. 941-98-0) was done as per the OECD guideline 105 by spectrophotometric analytical method as per OECD 101. The solubility of (1'-acetonaphthone of 941-98-0 )in water was determine to be 87.677 mg/L at 25°C.

Thus the 1'-acetonaphthone is considered to be slightly soluble in water.

Surface tension:

The surface tension of 1-(1-naphthyl)ethanone (941-98-0)from Advanced Chemistry Development was predicted to be 42.3 mN/m.

Flash point:

The flash point determination of 1-(1-naphthyl)ethanone (CAS No. 941-98-0)was done following closed cup method using Pensky-Martens flash point apparatus. The test was conducted in replicates and mean flash point was determined to be 135.3°C at 978.8hPa. Based on criteria mentioned in CLP regulation the chemical has flash point >than 60 degree C hence the substance was considered to be non-flammable.

Autoflammability:

1-(1-naphthyl)ethanone did not catch fire on being exposed to air at room temperature of 27°Cpressure of 966 hPa. This indicates that 1-(1-naphthyl)ethanone is not auto-flammable.

Flammability:

1-(1-naphthyl)ethanone does not indicate any ignition when the flame of bunsen burner having temperature of approximately 950°C is brought in contact with it. Thus it can be concluded that 1 -(1-naphthyl)ethanone is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus 1-(1-naphthyl)ethanone was considered non-flammable.

Explosivenss:

The study does not need to be conducted because there are no chemical groups present in the molecule which are associated with explosive properties

Oxidising properties:

The study does not need to be conducted because there are no chemical groups present in the molecule which are associated with oxidising properties and hence, the classification procedure does not need to be applied

pH:

The pH determination of test item 1'-acetonaphthone (CAS No. 941-98-0 ) was done as per the test guideline OECD 122. The mean pH of the test solutionwas determined with the help of digital pH meter. The mean pH was determine to be 6.08 at 28 °C.

Viscosity:

The viscosity determination of Test item 1'-acetonaphthone (CAS No. 941-98-0 )was done as per the test guideline OECD 114 using Redwood Viscometer No. 1. Kinematic viscosity (experimental) of Test item at 20°C and 40°C is 32.357 mm²/sec and 68.4931 mm²/s, respectively. Dynamic viscosity (calculated) of Test item at 20°C and 40°C is 36.0586 mPa.S and 76.3287 mPa.S, respectively

Additional information

Appearance:

On the basis of physical observation the chemical 1-(1-naphthyl)ethanone is observed to be clear pale yellow colored liquid in appearance.

Other supporting studies from reliable sources such as review article and authoritative database also suggets that the chemical 1 -(1 -naphthyl)ethanone is reported to be yellow colored liquid in appearance having fruity odour.

Freezing point:

The Freezing point determination of 1'-acetonaphthone (CAS No.941-98-0) was done using crushed ice and salt. No freezing was observed up to -13.65 °C. Hence, the freezing point was inferred to be less than -13.65 °C at 979.4 hPa.

Based on available data from authoritative database the freezing point of chemical 1-(1-naphthyl)ethanone is determined to be 10.5 degree C. Other supporting study from review article also suggests that the freezing point of chemical 1-(1-naphthyl)ethanone was reported to be 10 degree C, 10.2 degree C & in the range between 9 -10 Deg C.

Boiling point:

The boiling point determination of 1-(1-naphthyl)ethanone (CAS No. 941-98-0) was done following OECD Guideline 103 and according to the method of Siwoloboff. The test was conducted in replicates and mean boiling point was determined to be 297.6°C at 979.6 hPa.

Other supporting studies from various reliable sources such as handbooks and authoritative database also suggests that the boiling point of chemical 1-(1-naphthyl)ethanone was reported to be in the range of 297 degree C to 302 degree C.

As the data from lab has K1 reliability and the test was performed using OECD guidelines which has the value of boiling point temperature as 297.6 degree C at 979.6 hPa, 164 degree C at 13 Torr, in the range between 75 -80 Deg C at 0.15 Torr, thus considered as key study.

Density:

The density of substance 1-(1-naphthyl)ethanone (CAS No. 941-98-0)was determined following OECD Guideline 109 and according to the IS 4730 : 1994 (Reaffirmed 2010) – Method for Determination of Density of Liquids (First Revision) using glass pyknometer .The mean density of substance 1-(1-naphthyl)ethanone was determined to be 1.1144g/cm³ at 20°C and 972.3 hPa.

Other supporting from various reliable sources such as authoritative database and handbooks suggests that the density of chemical 1-(1-naphthyl)ethanone was reported to be in the range of 1.117 g/cm3 to 1.1338 g/cm3 ,and the selected key study value lies in the range as mentioned above.

As the data from lab has K1 reliability and the test was performed using OECD guidelines which has the value of density as 1.1144 g/cm3 at 20 degree C,thus considered as key study.

Particle Size Distribution:

The study does not need to be conducted because the test chemical is marketed or used in a non- solid or granular form.

The chemical 1-(1-naphthyl)ethanone is observed to be clear pale yellow colored liquid in appearance.

Hence this endpoint was considered for waiver.

Vapour Pressure:

Data from handbooks, authoritative and modeling databases suggests that the experimental vapour pressure of 1-acetonapthone at 25 deg C was 5.23E-02 Pa.

MPBPVP v1.43 was used to estimate the vapour pressure of 1-acetonapthone.The estimated vapour pressure of 1-acetonapthone at 25 deg C was 0.253 Pa.

Partition Coefficient:

The partition Coefficient n-octanol/water of test chemical 1'-acetonaphthone (CAS No. 941-98-0) was determined by the Reverse Phase High Performance Liquid Chromatographic method according to OECD Guideline No. 117 for testing of Chemicals. A test item solution was prepared by accurately measuring 5 μL of test item and diluting with acetonitrile up to 10 mL. Thus, the test solution concentration was 560 mg/l. The pH of test substance was 6.0. The reference substances were chosen according to estimated Pow range of the test substance and generalized calibration graph was prepared.. The reference substances were Phenol, Biphenyl, Benzyl Benzoate, 1,2,4-Trichlorobenzene, 2,3-Dichloroaniline, Diphenylamine, Cinnamyl alcohol, 4-Methylbenzyl alcohol, Cinnamic Acid, Dodecanoic acid, n-Butylbenzene, Naphthalene, Diphenyl ether, DDT having log Pow value ranging from 1.5 to 6.5. The Log Pow value of the test chemical 1'-acetonaphthone was determined to be 3.368 ± 0.001 dimensionless at 25°C.

Water Solubility:

The water solubility determination of test item 1'-acetonaphthone (CAS No. 941-98-0) was done as per the OECD guideline 105 by spectrophotometric analytical method as per OECD 101. The solubility of (1'-acetonaphthone of 941-98-0 )in water was determine to be 87.677 mg/L at 25°C.

Thus the 1'-acetonaphthone is considered to be slightly soluble in water.

Surface tension:

The surface tension of 1-(1-naphthyl)ethanone (941-98-0)from Advanced Chemistry Development was predicted to be 42.3 mN/m.

Flash point:

Flash point of 1-(1-naphthyl)ethanone (CAS No. 941-98-0) was determined from experimental report of laboratory ,authoritative database and handbook. As the data from laboratory report has K1 reliability and the test was performed using OECD guidelines which have the value of flash point as 135.3 °C at 978.8 hPa thus considered as key study for the chemical safety assessment. Supported to the above data from Gestis database and handbooks the flash point was determined to be 113 and 110 degree C. Thus,based on criteria mentioned in CLP regulation the chemical has flash point >than 60 degree C hence the 1-(1-naphthyl) ethanone (941-98-0) was considered to be non-flammable.

From the available data of 1-(1-naphthyl)ethanone (941-98-0) from gestis database the flash point was determined to be 113 degree C & 110 degree C..

Autoflammability:

1-(1-naphthyl)ethanone did not catch fire on being exposed to air at room temperature of 27°Cpressure of 966 hPa. This indicates that 1-(1-naphthyl)ethanone is not auto-flammable.

Flammability:

1-(1-naphthyl)ethanone does not indicate any ignition when the flame of bunsen burner having temperature of approximately 950°C is brought in contact with it. Thus it can be concluded that 1 -(1-naphthyl)ethanone is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus 1-(1-naphthyl)ethanone was considered non-flammable.

Explosivenss:

The study does not need to be conducted because there are no chemical groups present in the molecule which are associated with explosive properties

Oxidising properties:

The study does not need to be conducted because there are no chemical groups present in the molecule which are associated with oxidising properties and hence, the classification procedure does not need to be applied

pH:

The pH determination of test item 1'-acetonaphthone (CAS No. 941-98-0 ) was done as per the test guideline OECD 122. The mean pH of the test solutionwas determined with the help of digital pH meter. The mean pH was determine to be 6.08 at 28 °C.

Viscosity:

The viscosity determination of Test item 1'-acetonaphthone (CAS No. 941-98-0 )was done as per the test guideline OECD 114 using Redwood Viscometer No. 1. Kinematic viscosity (experimental) of Test item at 20°C and 40°C is 32.357 mm²/sec and 68.4931 mm²/s, respectively. Dynamic viscosity (calculated) of Test item at 20°C and 40°C is 36.0586 mPa.S and 76.3287 mPa.S, respectively

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