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    3-FA molecular structure

    3-FA Stats & Data

    Pal-353 3-fluoroamphetamine 3fa
    NPS DataHub
    MW153.2
    FormulaC9H12FN
    CAS1626-71-7
    IUPAC1-(3-fluorophenyl)propan-2-amine
    SMILESCC(N)Cc1cccc(F)c1
    InChIKeyPIOCLGPCMNPZFT-UHFFFAOYSA-N
    Phenethylamines; 2020/1. Von 2-Phenethylamin abgeleitete Verbindungen; 2021/1. Von 2-Phenethylamin abgeleitete Verbindungen; 2022/1. Von 2-Phenethylamin abgeleitete Verbindungen
    Chemical Class Amphetamine
    Psychoactive Class Stimulant
    Half-Life Unknown in humans; animal work suggests relatively rapid clearance consistent with short/intermediate duration of action.

    Receptor Profile

    Receptor Actions

    Other
    Dopamine releasing agent
    Norepinephrine releasing agent
    Serotonin releasing agent (minor)

    History & Culture

    3-Fluoroamphetamine emerged as part of a wave of designer fluorinated amphetamine compounds that gained popularity in the late 2000s as research chemical alternatives to traditionally available stimulants. This series includes related compounds such as 2-FA, 2-FMA, 3-FEA, and 4-FA. The substance was first formally documented on the recreational drug market when Belgium reported its appearance to the European Early Warning System in January 2009. Little is known about the precise origins of 3-fluoroamphetamine's synthesis or early development. Unlike many amphetamine derivatives with extensive pharmaceutical or military research histories, 3-FA appears to have emerged primarily within the designer drug and research chemical context. The compound has been utilized in pharmacological studies examining monoamine release mechanisms, and has attracted some research interest for potential neuropharmacological applications. Its history of human recreational use remains extremely short, with distribution occurring almost exclusively through online grey market vendors rather than through traditional street drug channels.

    Effect Profile

    Curated + 5 Reports
    Empathogen 6.3

    Strong euphoria with moderate stimulation, mild sensory enhancement and empathy

    Empathy / Social Openness×3
    4
    Euphoria / Mood Elevation×2
    10
    Stimulation×1
    7
    Sensory Enhancement×1
    5
    Stimulant 6.6

    Strong euphoria, anxiety/jitters, and focus with mild stimulation

    Stimulation / Energy×3
    5
    Euphoria / Mood Lift×2
    10
    Focus / Productivity×2
    9
    Anxiety / Jitters×1
    10

    Tolerance & Pharmacokinetics

    drugs.wiki
    Half-Life
    Unknown in humans; animal work suggests relatively rapid clearance consistent with short/intermediate duration of action.
    Addiction Potential
    Moderate to high; substrate-type catecholamine releaser with high dopaminergic selectivity is associated with robust nucleus accumbens dopamine efflux and reinforcing effects, increasing redose compulsion risk.

    Tolerance Decay

    Full tolerance 1d Half tolerance 3d Baseline ~10d

    Acute tolerance to subjective and cardiovascular effects develops within a session; partial recovery occurs over several days with baseline typically returning within 1–2 weeks if abstinent. Cross-tolerance with other amphetamines is expected due to shared transporter-mediated mechanisms.

    Cross-Tolerances

    Amphetamine
    70% ●○○
    Methamphetamine
    60% ●○○
    4-FA (4-fluoroamphetamine)
    50% ●○○
    2-FA (2-fluoroamphetamine)
    70% ●○○

    Experience Report Analysis

    Erowid
    5 Reports
    2011–2025 Date Range
    4 With Age Data
    13 Effects Detected

    Demographics

    Gender Distribution

    Age Distribution

    Reports Over Time

    Effect Analysis

    Erowid

    Effects aggregated from 5 experience reports (5 Erowid)

    5 Reports
    13 Effects Detected
    7 Positive
    4 Adverse
    2 Neutral

    Effect Sentiment Distribution

    Confidence Distribution

    Positive Effects 7

    Empathy 100.0% 70%
    Stimulation 100.0% 70%
    Euphoria 80.0% 70%
    Music Enhancement 80.0% 70%
    Tactile Enhancement 80.0% 70%
    Focus Enhancement 60.0% 70%
    Body High 60.0% 70%

    Adverse Effects 4

    Jaw Clenching 80.0% 70%
    Sweating 80.0% 70%
    Increased Heart Rate 80.0% 70%
    Anxiety 60.0% 70%

    Real-World Dose Distribution

    62K Doses

    From 13 individual dose entries

    Oral (n=10)

    Median: 26.5mg 25th: 20.0mg 75th: 33.75mg 90th: 40.5mg
    mg/kg median: 0.327 mg/kg 75th: 0.548

    Form / Preparation

    Most common forms and preparations reported

    Legal Status

    Country Status Notes
    China Controlled substance Classified as a controlled substance as of October 2015.
    Finland Scheduled narcotic Listed in the government decree on substances, preparations, and plants considered to be narcotic drugs.
    France Unscheduled (grey area) As of December 2024, not explicitly scheduled under French drug laws. Possession is technically legal but exists in a regulatory grey area.
    Germany NpSG controlled Controlled under the Neue-psychoaktive-Stoffe-Gesetz (New Psychoactive Substances Act) since November 26, 2016. Production, import for market placement, administration to others, and trading are punishable offenses. Possession is prohibited but not subject to criminal penalty.
    New Zealand Schedule 3 (Class C) Classified as a Schedule 3 Class C controlled substance due to its status as an amphetamine analogue under New Zealand drug scheduling.
    Switzerland Verzeichnis E Specifically named as a controlled substance under Verzeichnis E of Swiss narcotics legislation.
    Turkey Illegal Classified as a controlled drug. Possession, production, supply, and importation are all prohibited.
    United Kingdom Class A Controlled as a Class A substance under the amphetamine analogue clause of the Misuse of Drugs Act 1971. Class A classification carries the most severe penalties under UK drug law.
    United States Unscheduled (analogue liability) Not explicitly scheduled at the federal level but may be prosecuted under the Federal Analogue Act (21 U.S.C. § 813) as structurally similar to amphetamine. This provision applies only when the substance is intended for human consumption, treating it as equivalent to a Schedule I or II controlled substance.

    Harm Reduction

    drugs.wiki

    3-FA (PAL-353) is a monoamine releasing agent with high selectivity for dopamine and norepinephrine over serotonin in in vitro assays and in vivo primate studies, which correlates with reinforcing potential. Human pharmacokinetics are not established; user timelines suggest a 4–8 h primary effect window with residual stimulation and insomnia into the next day. Marked batch-to-batch potency variability has been reported; always allergy test (1–2 mg), use a milligram scale, and titrate slowly. Redosing can escalate cardiovascular strain and insomnia; set a hard cap and avoid extended binges (>24 h) due to psychosis/seizure risk. Stimulant risks include hypertension, tachycardia, vasoconstriction (cold extremities), hyperthermia, and dehydration; actively manage temperature and electrolytes, especially during dancing/exertion. Avoid combinations that raise serotonin (e.g., DXM, tramadol, MDMA) or lower seizure threshold (e.g., bupropion); MAOIs are a hard contraindication. Use drug checking: vendors sometimes mislabel ring-substituted amphetamines/cathinones; multi-reagent testing and, where available, spectrometric checking reduce adulterant risks. Nasal use increases local tissue irritation and infection risk; use clean equipment and isotonic saline rinses post-session. People with cardiovascular disease, uncontrolled hypertension, hyperthyroidism, glaucoma, or a history of psychosis should avoid use; anyone on prescription psych meds should consider interaction risks and spacing. Space sessions by at least 1–2 weeks to allow tolerance and sleep patterns to normalize; prioritize nutrition (carbohydrates, protein) and rehydration after use. Sexual compulsion and prolonged arousal are commonly reported; plan consent and protection ahead and beware of priapism risks.

    References

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