4-BA Stats & Data
Pba
4-br-amp
PubChem
MW214.10
FormulaC9H12BrN
LogP2.5
IUPAC1-(4-bromophenyl)propan-2-amine
InChIKey
SMNXUMMCCOZPPN-UHFFFAOYSA-N
Chemical Class
Amphetamine
Psychoactive Class
Stimulant
Effect Profile
Curated
Empathogen
6.4
Strong euphoria with moderate stimulation and sensory enhancement, mild empathy
Empathy / Social Openness×3
5
Euphoria / Mood Elevation×2
8
Stimulation×1
7
Sensory Enhancement×1
7
Stimulant
4.2
Strong anxiety/jitters and euphoria with moderate stimulation
Stimulation / Energy×3
6
Euphoria / Mood Lift×2
8
Focus / Productivity×2
0
Anxiety / Jitters×1
10
Based on reports from:
Tolerance & Pharmacokinetics
drugs.wikiTolerance Decay
Full tolerance
1d
Half tolerance
12d
Baseline
~21d
Acute tolerance: develops within a single session — the reset numbers above apply after sustained heavy use, not after one binge. Within-session tachyphylaxis usually resets largely overnight.