Chemical Properties of Fentanyl (CAS 437-38-7)


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InChI Key
Molecular Weight1
Other Names
  • 1-(2-Phenylethyl)-4-(N-propananilido)piperidine
  • 1-Phenethyl-4-(N-Phenylpropionamido)piperidine
  • 1-Phenethyl-4-N-propionylanilinopiperidine
  • Duragesic
  • Fentanest
  • Fentanil
  • Fentora
  • Matrifen
  • N-(1-Phenylethyl-4-piperidinyl)propionanilide
  • N-Phenethyl-4-(N-propionylanilino)piperidine
  • N-phenyl-N[1-(2-phenylethyl)-4-piperidinyl]propanamide (fentanyl)
  • Phentanyl
  • Propanamide, N-phenyl-N-[1-(2-phenylethyl)-4-piperidinyl]-
  • Propionanilide, N-(1-phenethyl-4-piperidyl)-
  • R 4263
  • Sentonil
  • Sublimase
  • Sublimaze
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Physical Properties

Property Value Unit Source
Δfus 30.10 kJ/mol Vapor P...
Δsub 144.60 ± 7.20 kJ/mol NIST
log10WS -4.69 Crippen Calculated Property
logPoct/wat 4.137 Crippen Calculated Property
McVol 283.990 ml/mol McGowan Calculated Property
Inp [2681.00; 2757.00]   Show Hide
Inp 2725.00 NIST
Inp 2701.00 NIST
Inp 2701.00 NIST
Inp Outlier 2681.00 NIST
Inp 2720.00 NIST
Inp Outlier 2757.00 NIST
Inp 2718.00 NIST
Inp 2730.00 NIST
Inp 2730.00 NIST
Inp 2720.00 NIST
Inp 2718.00 NIST

Temperature Dependent Properties

Property Value Unit Temperature (K) Source
ΔfusH [22.51; 30.10] kJ/mol [357.20; 358.30] Show Hide
ΔfusH 22.51 kJ/mol 357.20 NIST
ΔfusH 30.10 kJ/mol 358.30 NIST
ΔvapH 107.20 ± 4.20 kJ/mol 458.00 NIST

Similar Compounds

Para-fluorofentanyl. Methyl-3-fentanyl. 4'-Chloro fentanyl. Acetanilide, N-(1-phenethyl-4-piperidyl)-. Isobutanoyl fentanyl. 4'-Chloro butanoyl fentanyl. Acetyl 4'-fluorofentanyl. 4''-Methoxy fentanyl. 3-Methylfentanyl. 4'-Methoxy fentanyl. «alpha»-Methylfentanyl. «alpha»-Methyl butanoyl fentanyl. «alpha»-Methyl isobutanoyl fentanyl. Isobutanoyl 4'-chloro fentanyl. Butanoyl 4'-fluoro fentanyl.

Find more compounds similar to Fentanyl.


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Outlier This icon means that the value is more than 2 standard deviations away from the property mean.