Amphetamine Data

Structure #

L-amphetamine and D-amphetamine

Name

Structure

L-amphetamine
Levo-amphetamine
(-)-amphetamine
(R)-amphetamine
左旋

D-amphetamine
Dextro-amphetamine
(+)-amphetamine
(S)-amphetamine
右旋

Chemical and Physical Properties #

Property Name

Property Value

Molecular Weight

135.21

Exact Mass

135.104799419

Monoisotopic Mass

135.104799419

Dissociation Constants

pKa 9.9 (ADDERALL XR (amphetamine) FDA label) pKa = 10.13 (conjugate acid) (Dissociation constants of organic bases in aqueous solution) A pKa of 10.13(1) indicates amphetamine will exist almost entirely in the cation form at pH values of 5 to 9.

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Spectral Information #

GC-MS #

Main Library

m/z Top Peak 44

m/z 2nd Highest 91

m/z 3rd Highest 65

Replicate Library

m/z Top Peak 44

m/z 2nd Highest 91

m/z 3rd Highest 42

MS-MS #

Ionization Mode: Positive

Top 5 Peaks

119.0859 100

136.1124 77.34

120.0892 12.35

137.1161 8.38

LC-MS #

MS Level MS2

Precursor Type [M+H]+

Precursor m/z 136.1121

Ionization ESI

Ionization Mode positive

Collision Energy 10 eV

Top 5 Peaks

119.0859 100

136.1124 77.34

120.0892 12.35

137.1161 8.38

Reference #

Pubchem: Amphetamine