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Other Properties of Adi-pure®

Physical and Chemical Properties
The Tables show the typical physical and chemical properties of INVISTA Adi-pure®

Typical Physical Properties of Adi-pure®
Property Typical Value
Molecular Weight 146.14
Boiling Point (760 mm) 337.5°C (639.5°F) with
decomposition
Melting Point 151.5–153.0°C
(304.7–307.4°F)
Density
  Solid
  Liquid at 163°C (325.4°F)

1.360 g/cc
1.093 g/cc
Bulk Density
  Loose
  Packed

640–720 kg/m3 (40–45 lb/ft3)
Packed 800–930 kg/m3 (50–58 lb/ft3)
Hygroscopicity Nonhygroscopic at 27°C
(80.6°F) and 85% RH
Crystal Form Monoclinic needles
Solution Properties
Property Typical Value
Solubility see Figure below the Table
pH of Aqueous
Solutions at
25°C (77°F)
Concentration     pH
0.1% 3.2
0.2% 3.1
0.4% 3.0
0.6% 2.9
1.2% 2.8
2.5% 2.7
Density of Saturated
Aqueous Solutions
Temperature     Density
20°C (68°F) 1.0045 g/cc
40°C (104°F) 1.0050 g/cc
60°C (140°F) 1.0125 g/cc
Ionization Constant
( K) in Water at 25°C
(77°F)
Step 1   3.71 x 10–5 (p K1 = 4.43)
Step 2 3.87 x 10–6 (p K2 = 5.41)
Adipic Acid Solubility
Thermal Properties
Property Typical Value
Specific Heat
  Solid
  Liquid

1.59 kJ/kg·°K (0.38 cal/g·°C)
2.26 kJ/kg·°K (0.54 cal/g·°C)
Heat of Formation –6503 kJ/kg (–1625.8 cal/g)
Heat of Fusion 238.5 kJ/kg (57.0 cal/g)
Heat of Vaporization 560.3 kJ/kg (133.9 cal/g)
Heat of Sublimation at
25°C (77°F)

881.8 kJ/kg (210.8 cal/g)
Heat of Combustion 19,149 kJ/kg (4576.8 cal/g)
Heat of Solution, Water
10–20°C (50–68°F)
90–100°C (194–212°F)

–213.6 kJ/kg (–51.1 cal/g)
–240.5 kJ/kg (–57.5 cal/g)
Heat of Crystallization
from Water

265.3 kJ/kg (63.4 cal/g)
Other Typical Physical Properties
Property Typical Value
Flash Point, Cleveland
Open Cup

210°C (410°F)
Flash Point, Tag
Closed Cup

196°C (385°F)
Vapor Pressure, Molten
       Temperature     Vapor Pressure
       159.5°C (319.1°F)     0.13 kPa (1 mmHg)
       205.5°C (401.9°F)     1.33 kPa (10 mmHg)
       240.5°C (464.9°F)     5.33 kPa (40 mmHg)
       265.0°C (509.0°F)     13.33 kPa (100 mmHg)
       312.5°C (594.5°F)     53.32 kPa (400 mmHg)
       337.5°C (639.5°F)     101.31 kPa (760 mmHg)
       (with decomposition)      
Viscosity, Molten
       Temperature     Viscosity
       160°C (320°F)     4.54 cP
       193°C (379.4°F)     2.64 cP
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