4-HO-MCPT FUMARATE

Buy 4-HO-McPT Fumarate Online 

Buy 4-HO-McPT Fumarate (4-Hydroxy-N-methyl-N-cyclopropyltryptamine fumarate) is currently one of the most potent and sought-after research tryptamines in the entire research chemical scene.

Known as the absolute “crisp king” and “HD geometry monster”, 4-HO-McPT Fumarate delivers razor-sharp, crystalline, high-definition geometric visuals that researchers describe as the cleanest, most structured and intricate patterns in the entire 4-HO series – with significantly higher potency than 4-HO-MET and 4-HO-MiPT.

At ChemCentr.com we stock only the absolute highest-grade 4-HO-McPT Fumarate with ≥99.3% purity – currently the purest 4-HO-McPT fumarate available anywhere in Europe.

Technical Specifications – 4-HO-McPT Fumarate

• Full Chemical Name: infinity 4-Hydroxy-N-methyl-N-cyclopropyltryptamine fumarate (1:1)
• Common Names: 4-HO-McPT, 4-HO-MCPT, McPT, Crispmetocin, Cyclopropylmetocin
• CAS Number: 214038-18-9 (freebase registered research designation)
• Molecular Formula: C14H18N2O • C4H4O4
• Molecular Weight: 346.42 g/mol
• Appearance: Pure white, highly crystalline, sparkling powder with characteristic “glass-like” shard structure
• Purity: ≥99.3% (current batch 99.5% – double-tested HPLC-MS + NMR)
• Form: Fumarate salt – maximum stability, perfect water solubility (>100 mg/ml)
• Current Batch: MCPT-1125-NOV (synthesized October 2025, CoA dated 2025-11-12)

Why 4-HO-McPT Fumarate Is the #1 Visual Powerhouse

4-HO-McPT Fumarate is structurally 4-HO-MET but with the ethyl group replaced by cyclopropyl – this single change creates dramatically increased potency (1.6–1.8× stronger than 4-HO-MET mg-per-mg) and produces visuals that are exceptionally crisp, crystalline, lattice-like, and fractal – often described as “seeing the matrix” or “geometric overload”.

Researchers consistently report:

• Extremely sharp, high-level 8A/8B geometry even at moderate doses
• Crystalline, lattice and grid patterns that “snap” into place
• Moderate color enhancement but overwhelming structure and detail
• Very clean mental state with less “breathing” and more “architectural” than 4-HO-MET
• Moderate euphoria + stimulation without heavy confusion

Duration & Dosage (oral research):

• Threshold: 4-8 mg
• Light: 8–15 mg
• Common: 15–25 mg -HO-McPT Fumarate is extremely potent – 20 mg 4-HO-McPT Fumarate is equivalent to ~35-40 mg 4-HO-MET in visual intensity
• Onset: 20–60 minutes
• Peak: 2–4 hours
• Total duration: 5–8 hours (most report 6–7 hours total with smooth afterglow

Reported Side Effects & Risk Profile of 4-HO-McPT Fumarate

4-HO-McPT Fumarate is known for significant physical side effects – it is noticeably “heavier” on the body than 4-HO-MET.

Common side effects include:

• Strong nausea and vomiting during come-up (60–90 minutes, very common at >15 mg)
• Pronounced vasoconstriction – cold extremities, tingling, potential pain in limbs
• Muscle tension and clenching (jaw, calves, back)
• Increased heart rate and blood pressure spikes
• Temperature dysregulation (feeling cold then hot)
• Potential paranoia, anxiety loops at doses >25 mg
• Heavy body load and sedation after peak

4-HO-McPT Fumarate has higher risk of physically uncomfortable experiences than 4-HO-MET, but the visuals are widely considered “worth it” for pure visual research.

Legal & Shipping Information

• Legal in most EU countries for research use
• 4-HO-McPT Fumarate is explicitly legal in Germany, Netherlands, Spain, Portugal, Poland, Czech Republic when sold as research chemical
• Grey in USA (falls under Analogue Act if for human consumption)
• Discreet shipping worldwide

ChemCentr.com – Your Trusted 4-HO-McPT Fumarate Supplier 

We are the only vendor in Europe with 99.5%+ purity 4-HO-McPT Fumarate in stock and ready to ship today.

Order 4-HO-McPT Fumarate now and experience the crispest tryptamine visuals available – limited batch, will sell out fast.