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Dielectric constants chart
The dielectric constant of common fluids is indicated below. Dielectric constants are generally
influenced by:
• temperature
• moiture levels
• electrical frequency
• part thickness
Fluid Temperature in °C (°F) Dielectric Constant
(
ε
)
Acetal 25 (77) 3.8
Acetaldehyde 15
Acetamide 76.7 (170) 59.2
Acetic Acid 20 (68) 6.2
Acetone 25 (77) 20.7
Acetophenone 18
Acetyl bromid 16.2
Acetyl chloride 15.9
Acetylacetone 23
Acetylene dibromide 7.2
Acetylene tetrabromide 5.6
Aconite acid ester 6.3
Adipic Acid 1.8
Aerosile 1.0
Aether 4.0
Air (at STP, for 0.9 MHz) 1.00058986 ±0.00000050
Alcohol, allyl 20.6
Alcohol, cetyl 60 (140) 3.6
Alcohol, diacetone 18.2
Alcohol, ethyl (ethanol) 25 (77) 24.3
Alcohol, methyl (methanol) 20 (68) 33.1
Alcohol, propyl 20 (68) 21.8
Allyl chloride 8.2
Allyl iodide 6.1
Aluminum bromide 100 (212) 3.4
Ammonia 15
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