Properties of aspirin

Thermophysical properties for aspirin (CAS: 50-78-2). Use the selector below to view properties in different unit systems.

Unit System

Calculation Conditions

The following state-dependent properties were calculated at these standard conditions.

Temperature

25 °C

Pressure

1.01325 bar

Need properties at a different state? Use our interactive calculator.

Open Calculator

Identification

Atoms
C: 9, H: 8, O: 4
CAS
50-78-2
Formula
C9H8O4
ID
50-78-2
InChI
C9H8O4/c1-6(10)13-8-5-3-2-4-7(8)9(11)12/h2-5H,1H3,(H,11,12)
InChI Key
BSYNRYMUTXBXSQ-UHFFFAOYSA-N
IUPAC Name
2-acetyloxybenzoic acid
Molecular Weight (kg)
180.157
Phase
s
PubChem ID
2244
SMILES
CC(=O)Oc1ccccc1C(=O)O
Synonyms

Physical Properties

Acentric factor
0.833
Critical pressure (bar)
32.7
Critical temperature (°C)
491.85
Critical volume (m³/kmol)
0.469
Dipole moment
Melting temperature (°C)
135
Normal boiling temperature (°C)
367.76

State-dependent Properties

API gravity
-17.8451
Compressibility factor
0.00543012
Density (kg/m³)
1356.1
Dynamic viscosity (cP)
0
Enthalpy of vaporization (mass) (kJ)
526.999
Enthalpy of vaporization (molar) (kJ/kmol)
9.4943e+4
Gibbs free energy (kJ/kmol)
0
Joule–Thomson coefficient
Kinematic viscosity
Molar enthalpy (kJ/kmol)
0
Molar entropy (kJ/(kmol·K))
0
Molar heat capacity (kJ/(kmol·K))
189.444
Molar volume (m³/kmol)
0.13285
Parachor
6.9877e-5
Poynting correction factor
1.00596
Prandtl number
Saturation pressure (bar)
1.8834e-7
Saturation temperature (°C)
290.572
Solubility parameter
2.5213e+4
Specific enthalpy (kJ)
0
Specific entropy (kJ/kg·K)
0
Specific gravity
1.35743
Specific heat capacity (kJ/kg·K)
1.05155
Surface tension
0.0520112
Thermal conductivity
Thermal diffusivity

Safety Properties

Autoignition temperature (°C)
-273.15
Flash point temperature (°C)
164.92
Lower flammability limit
0.0128784
Upper flammability limit
0.0761288

Environmental Properties

Global warming potential
Ozone depletion potential