Physical Properties









Acetic Acid



PHYSICAL PROPERTIES



The data in this section refers to the pure acid. Values for the commercial product may deviate slightly

from these figures.



Molecular mass                         60.053

Density at 20°C                        1.049 kg/litre

Melting point                          16.66°C

Latent heat of fusion at               195.5 kJ/kg°C

melting point

Boiling point at 1013 mbar             117.9°C

Latent heat of vaporisation at         394.5 kJ/kg

boiling point

Critical temperature                   591.95 K

Critical pressure                      5.786 MPa

Coefficient of expansion

at 20°C                                1.04 x 10-3 per °C

Mean from 0-100°C                      1.12 x 10-3 per °C

Specific heat capacity at 19.4°C       2.043 J/g /K

(liquid, constant pressure)

Normal entropy S° ( liq, 25°c)         159.8 Jmol/K

               S° ( s, 25°c )          282.5 Jmol/K

Vapour pressure at 20°C                15.7 mbar

Heat of formation (vapour)             432.25 kJ/mole

Flash point (closed cup)               43°C

Autoignition temperature               463°C

Flammable limits in air

               lower                   4.0% volume

               upper                   16.00% volume

Heat of combustion                     -786.6 KJ/mol

Dielectric constant (liquid)           6.170

at 20°C

Refractive index nD20                  1.3719

Surface tension at 20°C                27.6 mN/m

Viscosity at 20°C                      1.183 mPa.s

Dissociation constant at 25°C          4.78 pKa









                                                Page 1 of 2

Technical Service and Development

January 2003







Exclusion of liability

Information contained in this publication is accurate to the b est of the knowledge BP p.l.c. and its subsidiary companies (“BP�).

Any information or advice obtained from BP otherwise than by means of this publication and whether relating to BP materials or other materials, is also given

in good faith. However, it remains at all times the responsibility of the customer to ensure that BP materials are suitable for the particular purpose intended.

Insofar as materials not manufactured or supplied by BP are used in conjunction with or instead of BP materials, the customer should ensure he has received

from the manufacturer or supplier all technical data and other information relating to such materials.

BP accepts no liability whatsoever (except as otherwise provided by law) arising out of the use of information supplied, t he application, adaptation or

processing of the products described herein, the use of other materials in lieu of BP materials or the use of BP materials in conjunction with such other

materials.





Published by BP p.l.c.

© BP p.l.c.

July2001

bp and the Helios mark are registered trademarks of BP p.l.c.









                                                                       Page 2 of 2