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Physical & Chemical properties

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The melting point of chlorobenzene is -46°C (Römpp Online, 2008)

Chlorobenzene boiling point is 131 -132 °C (The Merck Index, 2006, Römpp Online, 2008 ).

The density of chlorobenzene is

according to The Merck Index, 2006 at 20 °C 1.107 g/cm³.

Particle size distribution: the study does not need to be conducted because the substance is marketed or used in a non solid granular form.

Chlorobenzene vapor pressure is

at 20 °C: 11.73 hPa (Neumüller O-A, 1979. 8. Aufl., Bd 1, Frank´sche Verlagsbuchhandlung, Stuttgart, p 715)

at 22.2 °C: 13.3 hPa (Ullmann´s encyclopedia of industrial chemistry, fifth, completely revised edition, band A6, VHC Verlagsgesellschaft mmH Weinheim, 328-340)

at 25 °C: 15.81 hPa (J. Phys. Chem Ref. Data 10, 1175-1193)

Chlorobenzene vapor pressure is 11.73 hPa (20 °C); 13.3 hPa (22.2 °C); 15.81 hPa (25 °C).

In the BUA report 54, 1990. Chlorobenzene n-Octanol/water partition coefficients, log Pow are listed below:

-calculated according to Leo 2.855

-calculated according to Rekker 2.81

-calculated according to Nys & Rekker 2.83

-calculated (THOR database) 2.84

-calculated according to Leo 2.86

- calculated according to Leathy 2.80

- shaking method 2.84

-shaking method 2.46

-shaking method at 20°C 2.84

-column chromatographic method

and HPLC (25°C) 2.98 +-0.02

- RP-HPLC method (25°C) 2.98 +-0.04

- RP-HPLC method 3.00

- slow stirring method 2.898 +-0.004

- method not given 3.79

Accoriding to the BUA report 54 (1990) Chlorobenzene´s water solubility measured values are listed below :

at 20 ° C: 0.207 g/L (Bayer AG, interne Messungen, Wasserlöslichkeit. Werk Leverkusen, Zentrale Analytik, unveröffentlicht, 1987)

at 25 ° C: 0.295 ± 0.06 g/L ( Miller et al. 1984. J. Chem. Eng. Data 29:184-190)

at 25 °C: 0.499 ± 0.07 g/L (Wasik SP et al 1983. Residue Reviews 85:29-42)

at 25 °C: 0.503 g/L (Yalkowsky SH et al 1980. J. Pharm. Sci. 69:912-922)

at 30 ° C: 0.448 g/L (Freed VH et al 1979. Environ. Health Perspect. 30:75-80)

at 25 °C ± 0.05 °C: 0.502 g/L (Banerjee S et al. 1984. Environ. Sci. Technol 18:587-591)

at 30 °C: 0.474 g/L (McNally ME et al. 1983. J. Chromatogr. 260:23-32)

Chlorobenzene´s calculated water solubilty is:

at 25 °C: 0.538 g/L (Yalkowsky et al. 1979. Ind. Eng. Chem. Fundam. 18:351-353)

Chlorobenzene´s solubility value in salt water (salt content 30%) is: 0.339 g/L (Abernethy S et al. 1986. Aquat. Toxicol. 8:163-174)

Chlorobenzene is freely soluble in alcohol, benzene, chloroform, ether (Merk index, 2006).

In the BUA report, 1990, it has been reported that chlorobenzene surface tension is 33.86 mN/m at 15 °C, 33.28

mN/m at 20°C, 32.11 mN/m at 30 °C (Rathjen H ,1975. Ullmans Encyklopädie der technichen Chemie, 4. Auflage, Band , Verlag Chemie Weinheim/Bergstr., 499 -509).

Chlorobenzene flash point is 28 °C (Merck Index 2006).

Chlorobenzene ignition temperature of chlorobenzene is 590 °C (BUA report 54, 1990).

Chorobenzene is flammable. The flammable limits are the following:

1) upper flammable limit: 9.6%

2) lower flammable limit: 1.8%

(HSDB-database, 2008)

Chlorobenzene´s explosive limits in air are:

lower       vol 5%       g/cm³

1.3           50

upper       vol 5%       g/cm³

11             520

(Rossberg et al.2006)

Oxidising properties: due to its chemical structure the active substance does not contain functional groups in its molecular backbone which are known to enhance oxidising properties. The atom chlorine, presented in the chemical structure, is only bonded to carbon. Thus the active substance may not react exothermically with a combustible material and does not have oxidising properties.

Stability in organic solvents and identity of relevant degradation products: in accordance with Annex IX of the Regulation EC 1907/2006 testing is not neccessary because the stability of the substance is considered not to be critical.

Dissociation constant: due to a lack of relevant functional groups, the dissociation constant is irrelevant.

Chlorobenzene's viscosity is 0. 756 mPa*s (Kirk-Othmer, 2006)