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EC number: 212-889-4 | CAS number: 877-24-7
Endpoint summary
Administrative data
Description of key information
Appearance:
In an experiment conducted by SSS(Europe)AB,the chemical Potassium hydrogen phthalate was white colored crystalline solid in appearance.
Melting point:
The melting point determination of Potassium hydrogen phthalate (CAS No. 877-24-7) was done following OECD Guideline 102 and according to the metal block capillary method. The test was conducted in replicates and mean melting temperature range was determined to be 301.7°C -303.7°C at 974.9hPa.
Boiling point:
The boiling point determination of Potassium hydrogen phthalate (CAS No. 877-24-7 ) was done as per the test guideline OECD 103. The method followed was according to Siwoloboff. The boiling point of Potassium hydrogen phthalate is greater then 300°C at 977.5 hPa.
Density:
The density of Potassium hydrogen phthalate (CAS No. 877-24-7)was determined following OECD Guideline 109 and according to the Test methods: Pour density and tapped density of powders” recommended in The International Pharmacopoeia, Fourth Edition, 2014 using bulk density apparatus.The mean pour density and tapped density of chemical Potassium hydrogen phthalatwas determined to be 0.9092 g/cm³ and 1.000 g/cm³at 25.9°C and 976.7 hPa.
Particle Size Distribution:
The particle size distribution of test test item Potassium hydrogen phthalate (CAS No. 877-24-7 ) wasdetermined by granulometric analysis with rotap sieve shaker. The particle size distribution was determined to be in the range of 150 micron to 25 micron.
Vapour Pressure:
The study does not need to be conducted because the substance is a solid which melts above 300 degree C
Partition Coefficient:
Data from various authoritative and modeling, authoritative databases suggests that the estimated LogPow of Potassium Biphthalate was -2.73.
This value indicates that Potassium Biphthalate is hydrophillic in nature, which is also supported by its high solubility in water.
Water Solubility:
In the first study the water solubility determination of test substance Hydrogen potassium phthalate was done as per the shake flask method. The solubility was observed to be 82658.7 mg/L at 30°C. Thus this value suggest that the chemical is considered to be very soluble.
Surface tension
In accordance with column 2 of Annex VII of the REACH regulation, the study need only be conducted if surface activity is a desired property of the chemical. The 1,2-Benzenedicarboxylic acid, monopotassium salt (877-24-7) is used as a buffering agent. For this use, surface activity is not an important property. Hence this study was considered for waiver.
Flash point
The flash point determination of Potassium hydrogen phthalate (CAS No. 877-24-7)was done following closed cup method using Pensky-Martens flash point apparatus. The test was conducted in replicates and mean flash point was found to be 197.3°C at 977.0hPa.
Based on criteria mentioned in CLP regulation the chemical has flash point >than 60 degree C hence the substance Potassium hydrogen phthalate (CAS No. 877-24 -7) was considered to be non-flammable.
Autoflammability
1,2-Benzenedicarboxylic acid, monopotassium salt did not catch fire on being exposed to air at room temperature of 27°C and atmospheric pressure of 966 hPa. This indicates that 1,2-Benzenedicarboxylic acid, monopotassium salt is not auto-flammable.
Flammability
1,2-Benzenedicarboxylic acid, monopotassium salt 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 1,2-Benzenedicarboxylic acid, monopotassium salt is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus 1,2-Benzenedicarboxylic acid, monopotassium salt was considered non-flammable.
Explosiveness:
The study does not need to be conducted because the substance contains chemical groups associated with explosives properties which include oxygen,but the calculated oxygen balance is less than -200.
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 precedure does not need to be applied.
pH
From the available data from handbook, the pH of 1,2-Benzenedicarboxylic acid, monopotassium salt(877-24-7) was determined to be 4.005 This value indicate that the 1,2-Benzenedicarboxylic acid, monopotassium salt(877-24-7) is acidic in nature.
Viscosity: The study does not need to be conducted because the substance is a solid.
Additional information
Appearance:
In an experiment conducted by SSS(Europe)AB,the chemical Potassium hydrogen phthalate was white colored crystalline solid in appearance.
Other supporting studies from reliable sources such as authoritative database and handbook suggests that the chemicalHydrogen potassium phthalate was odourless,white crystals in appearance.
Melting point:
The melting point determination of Potassium hydrogen phthalate (CAS No. 877-24-7) was done following OECD Guideline 102 and according to the metal block capillary method. The test was conducted in replicates and mean melting temperature range was determined to be 301.7°C -303.7°C at 974.9hPa.
Boiling point:
The boiling point determination of Potassium hydrogen phthalate (CAS No. 877-24-7 ) was done as per the test guideline OECD 103. The method followed was according to Siwoloboff. The boiling point of Potassium hydrogen phthalate is greater then 300°C at 977.5 hPa.
Density:
The density of Potassium hydrogen phthalate (CAS No. 877-24-7)was determined following OECD Guideline 109 and according to the Test methods: Pour density and tapped density of powders” recommended in The International Pharmacopoeia, Fourth Edition, 2014 using bulk density apparatus.The mean pour density and tapped density of chemical Potassium hydrogen phthalatwas determined to be 0.9092 g/cm³ and 1.000 g/cm³at 25.9°C and 976.7 hPa.
Other supporting study from various reliable handbooks suggests that the density of chemical Hydrogen potassium phthalate was reported to be 1.636 g/cm3 at 25 degree C.
As the data from lab has K1 reliability and the test was performed using OECD guidelines which has the value of mean pour density and tapped density as 0.9092 g/cm³ and 1.000 g/cm³ respectively,thus considered as key study for the chemical safety assessment.
Particle Size Distribution:
The particle size distribution of test test item Potassium hydrogen phthalate (CAS No. 877-24-7 ) wasdetermined by granulometric analysis with rotap sieve shaker. The particle size distribution was determined to be in the range of 150 micron to 25 micron.
Vapour Pressure:
The study does not need to be conducted because the substance is a solid which melts above 300 degree C
Partition Coefficient:
Data from various authoritative and modeling, authoritative databases suggests that the estimated LogPow of Potassium Biphthalate was -2.73.
This value indicates that Potassium Biphthalate is hydrophillic in nature, which is also supported by its high solubility in water.
Water Solubility:
Summarized result for the water solubility determination of test substance Hydrogen potassium phthalate.
In the first study the water solubility determination of test substance Hydrogen potassium phthalate was done as per the shake flask method. The solubility was observed to be 82658.7 mg/L at 30°C. Thus this value suggest that the chemical is considered to be very soluble.
Similarly a study was conducted to determine the water solubility of hydrogen potassium phthtlate at various temperatures. The water solubility of hydrogen potassium phthalate was determined to be 83 g/l at 20 deg C and 330 g/l at 100 deg C. These values suggests that hydrogen potassium phthalate is highly soluble in water.
Data from authoritative and estimated databases suggests that the water solubility of hydrogen potassium phthalate was determined to be 83300 mg/l. This value suggests that hydrogen potassium phthalate is highly soluble in water.
Thus based on the above studies, chemical consider to be very soluble in water.
Surface tension
In accordance with column 2 of Annex VII of the REACH regulation, the study need only be conducted if surface activity is a desired property of the chemical. The 1,2-Benzenedicarboxylic acid, monopotassium salt (877-24-7) is used as a buffering agent. For this use, surface activity is not an important property. Hence this study was considered for waiver.
Flash point
Various studies for the Potassium hydrogen phthalate (CAS No. 877-24-7) were reviewed to summarize the following information:
The flash point determination of Potassium hydrogen phthalate (CAS No. 877-24-7)was done following closed cup method using Pensky-Martens flash point apparatus. The test was conducted in replicates and mean flash point was found to be 197.3°C at 977.0hPa.
As per the available data for flash point from Haz- Map database, the flash point value of Potassium hydrogen phthalate (877-24-7)was determined to be >200 degree C.
As per the available data for flash point from laboratory report and databases, the flash point value determined was in range from197.3 degree C to >200 degree C. As the data from labortory has K1 reliability and the test was performed using OECD guidelines which has the value of flash point as 197 °C at 977.0 hPa within the range thus considered as key study for the chemical safety assessment. Also based on criteria mentioned in CLP regulation the chemical has flash point >than 60 degree C hence the substance Potassium hydrogen phthalate (CAS No. 877-24 -7) was considered to be non-flammable.
Autoflammability
1,2-Benzenedicarboxylic acid, monopotassium salt did not catch fire on being exposed to air at room temperature of 27°C and atmospheric pressure of 966 hPa. This indicates that 1,2-Benzenedicarboxylic acid, monopotassium salt is not auto-flammable.
Flammability
1,2-Benzenedicarboxylic acid, monopotassium salt 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 1,2-Benzenedicarboxylic acid, monopotassium salt is not flammable at high temperature. However since such high temperatures are not found under normal circumstances of transportation and use, thus 1,2-Benzenedicarboxylic acid, monopotassium salt was considered non-flammable.
Explosiveness:
The study does not need to be conducted because the substance contains chemical groups associated with explosives properties which include oxygen,but the calculated oxygen balance is less than -200
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 precedure does not need to be applied.
pH
From the available data from handbook, the pH of 1,2-Benzenedicarboxylic acid, monopotassium salt(877-24-7) was determined to be 4.005 This value indicate that the 1,2-Benzenedicarboxylic acid, monopotassium salt(877-24-7) is acidic in nature.
Viscosity:
The study does not need to be conducted because the substance is a solid.
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