Our facility offers a consistent, long-term supply of high-purity Sildenafil Citrate API. We utilize premium synthetic processes and strictly adhere to quality control standards for fine chemical production. Our product features high purity, low impurity levels, and stable characteristics; the powder is uniformly white, while its solubility and active ingredient stability far exceed standard industry benchmarks. It is suitable for a wide range of professional applications, including pharmaceutical research, formulation development, and experimental compounding.
With years of experience in the export of pharmaceutical raw materials, we oversee every stage of production-from synthesis and purification to screening and packaging. We maintain strict controls over residual solvents, heavy metals, and related substances, ensuring that every batch meets the quality inspection requirements of overseas clients. We maintain ample stock, offer samples for testing, and provide customized packaging and compliant export documentation, serving as a reliable, direct source of Sildenafil API for global pharmaceutical R&D firms and chemical traders.
Basic Product Specifications
| Basic Identification Parameters | |
| Product Name | Sildenafil Citrate |
| CAS Number | 171599-83-0 |
| Molecular Formula | C₂₈H₃₈N₆O₁₁S |
| Molecular Structure Diagram |  |
| Molecular Weight | 666.7 |
| Appearance | White to off-white crystalline powder; odorless |
| Product Grade | Research grade / Pharmaceutical grade API (Active Pharmaceutical Ingredient) |
| Physicochemical Properties | |
| Solubility | Sparingly soluble in water; readily soluble in DMF; soluble in methanol; slightly soluble in ethanol |
| Melting Point Range | 190°C–193°C |
| Stability | Chemically and physically stable under standard storage conditions (protected from light and moisture); resistant to deliquescence and degradation |
| Key Quality Indicators | |
| Assay/Purity | 98.0%–99.5% |
| Loss on Drying | ≤0.5% |
| Individual Impurity | Complies with standard industry internal control specifications; strict control of related substances |
| Heavy Metals (Pb, Cd, Hg, etc.) | Limits comply with general safety standards for raw materials |
| Residual Solvents | Solvent removal performed post-production; residual solvent levels controlled within acceptable limits |
What are the Advantages and Benefits of Sildenafil Raw Powder?
Sildenafil Citrate Product Benefits
Ultra-high purity, extremely low impurities
Adopting refined synthesis and recrystallization processes, the purity is stable at 99%+, the color is pure white and transparent, and the powder is fine and uniform. Strictly control trace impurities such as heavy metals, residual solvents, and related substances. All indicators are better than the general industry standards, and the batch purity is stable without fluctuations.
Stable physical and chemical properties, suitable for scientific research preparations
The product has extremely low moisture content, is not easy to deliquesce, and is not easy to oxidize. It has strong stability when stored in a light-proof sealed container at room temperature. It has excellent solubility, uniform dissolution rate, and intact active ingredients. It is suitable for various formulation experiments, pharmacological tests, and preparation debugging, and the finished product has high consistency.
Mature technology and good batch consistency
Large-scale mass production process, standardized quality control throughout the entire process, and highly uniform color, particle size, content, and impurity indicators for each batch. There is no color difference, agglomeration, or purity fluctuation problems, and it is suitable for long-term stable procurement and compound production.
High security and strong compliance
Strictly follow the USP/EP/ChP pharmacopoeia quality control standards, and the by-product residues are controllable. It has stable pharmacological effects, strong targeting, and few side effects and impurities. It is the preferred raw material for medical research and formal preparation development.
Efficacy of Sildenafil Citrate
This substance is a selective phosphodiesterase type 5 (PDE5) inhibitor. Its core mechanism of action involves:
1. Inhibiting PDE5 enzyme activity in the body, thereby reducing the breakdown of cyclic guanosine monophosphate (cGMP);
2. Increasing cGMP concentrations within the smooth muscle of the corpus cavernosum, promoting vascular smooth muscle relaxation and vasodilation, and enhancing local blood perfusion;
3. Prerequisite for action: It requires sexual stimulation to be effective; it possesses no inherent aphrodisiac properties and cannot directly increase libido or induce sexual arousal.
This product is a selective phosphodiesterase type 5 (PDE5) inhibitor. Its mechanism involves inhibiting PDE5 activity, raising intracellular cGMP levels in smooth muscle cells, relaxing the vascular smooth muscle of the corpus cavernosum, and increasing local blood flow. Clinically, it is primarily used in the development of medications for male erectile dysfunction and in pharmaceutical research related to pulmonary arterial hypertension. The product is effective only in the presence of sexual stimulation and does not possess aphrodisiac or libido-enhancing effects.
Packaging and Delivery
Packaging Specifications
Small-batch packaging: 1kg, 5kg, or 10kg sealed packs using aluminum foil bags with thickened, waterproof inner liners.
Bulk packaging: 25kg standard export-grade cardboard drums, kraft paper drums, or plastic drums-sturdy, pressure-resistant, and deformation-resistant.
All packaging features double-layer sealing to prevent moisture, clumping, leakage, and contamination.
Shipping channels
Supports delivery via DHL, FedEx, UPS, EMS, as well as sea, air, and multi-channel shipping;
Reliable freight forwarding partnerships enable end-to-end tracking of logistics, customs clearance, and release status, with timely updates provided to the customer.
Payment methods: Wire Transfer, Western Union, MoneyGram, Letter of Credit.
Delivery lead time
Standard stock items: Shipped within 24–48 hours of payment confirmation.
Customized repackaging/special specifications: Shipment arranged within 3–7 business days.
High-volume orders during peak seasons are scheduled in advance to ensure on-time delivery.
After-Sales Support
Pre-sales Service
Technical Consultation: A professional team provides product specifications, application solutions, and compliance guidance, while addressing inquiries related to R&D and production.
Sample Assurance: Small samples are available for testing prior to placing an order (shipping costs borne by the customer); orders may be cancelled unconditionally if the sample specifications do not match those of the bulk shipment.
In-sales Service
Order Tracking: Real-time synchronization of production progress, shipment status, and logistics information, accessible to customers at any time.
Quality Communication: Re-inspection and verification of each batch prior to shipment, with timely feedback on test results to ensure product quality.
Customization: Adjustment of purity, packaging, and documentation based on customer needs to meet specific order requirements.
After-sales Service
Quality Assurance: Free returns and exchanges are available for any quality issues within 7 days of delivery, with shipping costs covered by us.
Technical Support: Ongoing technical guidance provided, including formula optimization, process adjustments, and compliance declarations.
Long-term Partnership: Establishment of customer profiles to provide priority supply, preferential pricing, and dedicated service, ensuring a stable, long-term partnership.
Hot Tags: sildenafil citrate material powder, China sildenafil citrate material powder manufacturers, suppliers, factory, 99 Epimedium Extract Powder, Chive Seed Extract Powder, Maca Extract Raw Powder, male health raw materials, Mulberry Extract Powder, Polygonatum Extract Powder
