Registration Dossier

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

 

Summary of Physico-chemical properties for p-toluic acid at 1-10T

 

IUCLID ref no

Study

Result

Notes / Source

4.1

Appearance; physical state; colour

Slightly yellowish crystalline powder at STP.

 

4.2

Melting / freezing point

179.6 °C at 1 atm.

OECD SIDS 2008

4.3

Boiling point

273.9°C at 101.3 hPa.

OECD SIDS 2008

4.4

Density

1.06 g/cm3

Merck SDS v5.1

4.5

Granulometry

The D50 was found to be 41.4 µm. (50% < 41.4 µm)

Bioscience Research Foundation, Tamilnadu, India. 2018

4.6

Vapour pressure

0.0000811 hPa at 25°C.

OECD SIDS 2008

4.7

Partition coefficient

2.44 (HPLC)

OECD SIDS 2008

4.8

Water solubility

349 mg/l at 20°C

OECD SIDS 2008

4.9

Solubility in organic solvents / fat solubility

n/a

 

4.10

Surface tension

Study not undertaken as this characteristic is not required.

Study waived

4.11

Flash point

Study not undertaken as substance is a solid.

Study waived

4.12

Auto-flammability

No ignition was observed up to 400°C

Bioscience Research Foundation, Tamilnadu, India. 2018

4.13

Flammability

Non-flammable.

Bioscience Research Foundation, Tamilnadu, India. 2018

4.14

Explosiveness

Substance does not contain explosive groups.

Study waived

4.15

Oxidising properties

Molecule does not contain oxidising groups.

Study waived

4.16

Oxidation / reduction potential

n/a

 

4.17

Stability in organic solvents and identity of relevant degradation products

n/a

 

4.18

Storage stability and reactivity towards container material

n/a

 

4.19

Stability: thermal, sunlight, metals

Degradation 50% after 4.2 days (sunlight)

OECD SIDS 2008

4.20

pH

Not required at this tonnage band.

 

4.21

Dissociation constant

pKa 4.22 at 25°C

OECD SIDS 2008

4.22

Viscosity

n/a

 

4.23

Additional physico-chemical information

n/a

 

 

Additional information