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Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

Appearance:

The physical appearance of the test chemical 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone was determined to be a yellow colored powder.

Other supporting study also indicates that the chemical Couramin 7 is odourless yellow colored powder.

Melting Point:

The melting point determination of Test item 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone(CAS No. 27425-55-4) was done as per the test guideline OECD 102. The method followed was according toCapillary/metal block. The mean melting point range was found to be between 222.1°C to 234.5 °C at 969.9hPa. No decomposition was observed at this temperature.

Based on other supporting studies the melting point of the test chemical 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone (CAS no 27425 -55-4) is found to be in the range of 234 - 252 deg C.

Boiling Point:

The boiling point determination of Test item3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone(CAS No. 27425-55-4) was done as per the test guideline OECD 103. The method followed was according toSiwoloboff. The mean boiling point was found to be greater than 250°C at 969.3 hPa.

Density:

The mean density of test item 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone (CAS No. 27425-55-4) was determined following OECD Guideline 109 and according to theOECD guideline 109 and according to the method adapted from ASTM D 854-02 using glass pyknometer . The mean density of the test item was found to be0.3899 g/cm3at 20°C and 969.6 hPa.

Particle Size Distribution:

The particle size distribution of test item 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone (CAS No. 27425-55-4 )was determined by granulometric analysis with rotap sieve shaker.The particle size distribution was found to be in the range of 150 micron to 10 micron. The majority of the particulates were in the range of 75 to 53 microns. Thus, the particles of this chemicals are not of inhalable size.

Vapour Pressure:

Vapour pressure of 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone is estimated to be 0.000000000007453 Pa (Danish QSAR, 2016).

Partition Coefficient:

The octanol-water partition coefficient (log kow) of 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone is estimated to be 3.68 (Danish QSAR, 2016).

Water solubility:

The test substance 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone was found to be Slightly soluble in nature

Surface tension:

In accordance with column 2 of Annex VII of the REACH regulation, this testing needs to be carried out only if surface activity is a desired property of the chemical. The chemical 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone (Common name: Solvent Yellow 185) is used as a Fluorescent color. For this use, surface activity is not a desired property and hence this end point was considered for waiver.

Flash Point:

The flash point determination of 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone(CAS No. 27425-55-4) 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 begreater than 250°C at 970.6 hPa. For the puropse of chemical safety assessment, the flash point was considered to be 251oC.

Autoflammability:

The chemical 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone (Common name: Solvent Yellow 185) does not catch fire spontaneously upon exposure to air under normal conditions of temperature and pressure. Thus, the chemical is unlikely to be "Auto Flammable". Thus, this end point was considered for waiver.

Flammability:

The NFPA rating for the chemical 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone (Common name: Solvent Yellow 185) for flammability ranges between 0 to 1, indicating that the chemical is not likely to be flammable under normal conditions of temperature and pressure. Thus, this end point was considered for waiver. The chemical is considered as "Non Flammable" for the purpose of chemical safety assessment.

Explosiveness:

In accordance with column 2 of Annex VII of the REACH regulation, the study is scientifically unjustified since there are no chemical groups associated with explosive properties present in the molecule of the chemical 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone (Common name: Solvent Yellow 185). Thus, the chemical is not likely to be explosive and is considered as "Non Explosive" for the purpose of chemical safety assessment.

Oxidising properties:

In accordance with column 2 of Annex VII of the REACH regulation, the substance 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone (Common name: Solvent Yellow 185) is incapable of reacting exothermically with combustible materials,on the basis of the chemical structure. It is an organic substance containing oxygen but no halogen atoms and these elements are not chemically bonded to nitrogen or oxygen. THus, the chemical is unlikely to exhibit oxidising properties and this study was therefore considered for waiver and the chemical considered as "Non-oxidisng" for the purpose of chemical safety assessment.

pH:

The pH determination of test item 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone (CAS No. 27425-55-4) was done as per the test guideline OECD 122. The pH of the test solution was determined with the help of digitalpH meter. The pH of 1% w/v aqueous dispersion was found to be 6.21 at 30 °C indicating near neutral pH.

Viscosity:

In accordance with Section 2 of REACH Annex XI, information requirement section 7.17, this study cannot be conducted on solid materials or gases. According to ECHA Chapter 7 guidance, viscosity measurement is only relevant to liquids. 3-(1H-benzimidazol-2-yl)-7-(diethylamino)-2-benzopyrone is a powder.Hence this study can be considered for waiver.