Paraxanthine Powder, also known as 1,7-dimethylxanthine or 1,7-dimethyl-2,3,6,7-tetrahydro-1H-purine-2,6-dione, is a typical methylxanthine compound and a major metabolite of caffeine after its biotransformation in the human body. It belongs to the purine heterocyclic organic compound class. Structurally, it has a typical xanthine skeleton with two methyl substituents in the purine ring system. Its structure is highly correlated with that of caffeine, theobromine, and theophylline; therefore, it is usually classified into the Methylxanthine family in biological activity and pharmacological studies. One of the biggest structural differences between it and caffeine lies in the different methyl substitution positions. This subtle structural change further affects its metabolism, receptor binding, and physiological effects in vivo. After caffeine is ingested, it undergoes N-demethylation primarily through metabolic pathways such as the liver's CYP1A2, with a significant proportion of caffeine ultimately being converted into it. Therefore, it is not a completely unfamiliar exogenous compound, but rather an important naturally exposed component in the human caffeine metabolism process. As a raw material, its value lies not only in its well-defined chemical structure but also in its connection between "caffeine metabolites" and "functional methylxanthine raw materials."
Compared to using caffeine directly, it can be used as an independent active ingredient for research, allowing formulators to design more targeted products focusing on attention, cognitive performance, alertness, energy metabolism, and sports nutrition. In modern functional ingredient development, compounds that are naturally produced through the caffeine metabolic pathway and can be studied independently as raw materials have high development value. Its simple structure and low molecular weight make it a well-studied xanthine derivative, and thus it has long been a focus of research in pharmacology, neuroscience, sports nutrition, and metabolism.
Shaanxi Medibridge Biotech Co., Ltd. focuses on the supply of pharmaceutical raw materials and research-use compounds. We support customers with stable quality, clear specification communication, flexible packaging options, and document-related support for different project stages.
COA
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Product Name |
CAS Number |
Batch Number |
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Paraxanthine Powder |
611-59-6 |
MB2606130245 |
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Manufacturer Date |
Analysis Date |
Expiry Date |
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2026/6/13 |
2026/6/15 |
2028/6/15 |
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Sample Qty Base |
Packing |
Test Method |
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120KGS |
25KG/drum |
HPLC |
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Item |
Standard |
Results |
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Appearance |
Light-White Powder |
Conform |
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Odor |
Characteristic |
Conform |
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Assay |
≥98.0% |
99.37% |
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Particle Size |
100% pass 80mesh |
Conform |
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Moisture |
<5.0% |
Conform |
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Ash Content |
<4.0% |
Conform |
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Solvent Residue |
Eur.Pharm |
Conform |
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Total Heavy Metals |
<10 ppm |
Conform |
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Arsenic |
<1.0 ppm |
Conform |
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Lead |
<1.0 ppm |
Conform |
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Mercury |
<0.5 ppm |
Conform |
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DDT |
<0.2ppm |
Conform |
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E. Coli |
Negative |
Negative |
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GMO Status |
Complies |
GMO Free |
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Irradiation |
Complies |
Irradiation Free |
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Conclusion |
The batch conforms to the IN-HOUSE standard |
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Mechanisms of Action
- Adenosine Receptor Antagonism
Competitive Binding: Similar to caffeine, paraxanthine acts as a potent antagonist at adenosine A1 and A2A receptors, blocking adenosine-induced neural inhibition and fatigue, thereby increasing alertness and focus.
Higher Receptor Affinity: Research indicates that paraxanthine exhibits a slightly higher binding affinity for A2A receptors compared to caffeine, providing targeted stimulation with greater efficiency.
- Dopaminergic Pathway Modulation
By antagonizing A2A receptors, it relieves the allosteric inhibition on dopamine D2 receptors, indirectly enhancing dopaminergic neurotransmission in the striatum to elevate mood, motivation, and motor control.
- Phosphodiesterase (PDE) Inhibition & cAMP Accumulation
Inhibits phosphodiesterase enzymes (specifically PDE4), reducing the degradation of cyclic adenosine monophosphate (cAMP). Higher intracellular cAMP levels activate protein kinase A (PKA), promoting lipolysis and energy metabolism.
- Enhancement of Calcium Release
Acts on ryanodine receptors (RyR) in the sarcoplasmic reticulum to stimulate Ca2+ release in skeletal muscle cells, enhancing muscle contractile force and peak power output.
Physiological Functions & Clinical Research
Compared to traditional caffeine, clinical studies on paraxanthine demonstrate superior benefits across multiple domains:
- Cognitive Function & Mental Alertness
Focus & Reaction Speed: Clinical trials (such as those on patented forms like Enfinity) show that paraxanthine supplementation significantly reduces choice reaction time and improves executive function and memory during complex cognitive tasks.
No "Caffeine Crash": Unlike the sharp fluctuations in mental energy caused by caffeine, paraxanthine delivers a smoother, more sustained level of cognitive stimulation.
- Athletic Performance & Muscle Endurance
Power Output & Strength: Enhances muscle fiber contraction and neuromuscular transmission, significantly boosting maximum strength (1RM) and total reps in resistance training.
Aerobic Endurance & Anti-Fatigue: Promotes free fatty acid utilization to spare muscle glycogen, delaying the onset of exercise-induced fatigue.
- Fat Loss & Metabolic Rate Elevation
Significantly stimulates lipolysis in adipose tissue and increases thermogenesis, raising the resting metabolic rate (RMR).
Metabolic Advantages & Safety Profile (vs. Caffeine)
Paraxanthine is regarded as an "upgraded caffeine" primarily because it addresses several key pharmacokinetic drawbacks of caffeine:
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Parameter / Feature |
Caffeine |
Paraxanthine |
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Metabolic Pathway |
Requires hepatic CYP1A2 oxidation to yield paraxanthine, theophylline, and theobromine |
Bypasses CYP1A2 conversion, acting directly as the primary active metabolite |
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Genetic Polymorphism |
Highly sensitive to CYP1A2 genotype (slow metabolizers experience anxiety and jitteriness) |
Unaffected by CYP1A2 genetic variation, resulting in minimal inter-individual response variability |
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Half-Life & Sleep Disruption |
Longer half-life (approx. 4–6 hours), significantly disrupting sleep architecture |
Shorter half-life (approx. 3.1 hours), markedly reducing nighttime sleep disturbances |
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Side Effects (Jitters/Heart Rate) |
Prone to causing spikes in heart rate, elevated blood pressure, hand tremors, and jitters |
Significantly lower side-effect profile, with minimal hemodynamic fluctuations at equivalent doses |
Manufacturing Processes
Chemical Total Synthesis
Pathway: Utilizes methyluracil or imidazole derivatives as starting materials, undergoing methylation, nitration, reduction, and cyclization steps to selectively yield 1,7-dimethylxanthine.
Characteristics: High yield, cost-effective, and suitable for large-scale industrial manufacturing. Requires strict quality control over reaction by-products (e.g., positional isomers like theophylline or theobromine) and residual solvents/heavy metals.
Biocatalytic / Fermentation Route
Pathway: Employs engineered bacterial strains expressing specific demethylases to selectively remove the 3-position methyl group from caffeine (1,3,7-trimethylxanthine).
Characteristics: Environmentally friendly, highly specific, and free of isomeric impurities, aligning well with clean-label trends. However, production costs currently remain higher.
FAQ
What is paraxanthine used for?
Paraxanthine is used as a dietary supplement and mental stimulant to improve focus, alertness, and athletic performance with fewer jitters than caffeine.
Is it safe to drink paraxanthine?
Paraxanthine appears generally safe for healthy adults in short-term studies, but long-term human safety data remain limited.
Is paraxanthine stronger than caffeine?
Paraxanthine is roughly comparable or slightly more potent than caffeine in binding to brain receptors.
Is paraxanthine addictive?
Paraxanthine has a low abuse liability and does not appear to be strongly addictive, though it can still form part of a daily routine or habit.
If you are looking for a high-quality Paraxanthine Powder manufacturer with whom you can establish a long-term, stable partnership, then Shaanxi Medibridge Biotech Co., Ltd. would be your best business partner. Don't hesitate to contact us at hi@medibridgeapi.com.
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