OEM Calcium Dobesilate Manufacturer & Products

cGMP-Compliant Active Pharmaceutical Ingredient (API) & Custom FDF Manufacturing Solutions

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Technical Overview: Calcium Dobesilate (CAS 20123-80-2)

A comprehensive analysis of vasoprotective pharmacology, microvascular hyperpermeability regulation, and OEM production standards.

99.5%+
HPLC API Purity
< 10 ppm
Hydroquinone Impurity
250k m²
cGMP Production Base
10+
Global Regulatory DMFs

Pharmacological Mechanism & Clinical Utility

Calcium Dobesilate (Calcium 2,5-dihydroxybenzenesulfonate monohydrate, CAS: 20123-80-2) is a synthetic vasoprotective agent widely prescribed for microvascular disorders. Its unique structure acts directly on capillary walls to restore normal physiological function without exerting systemically disruptive hemodynamic actions.

By neutralizing reactive oxygen species (ROS), inhibiting platelet-activating factor (PAF) synthesis, and suppressing thrombocyte aggregation, Calcium Dobesilate drastically reduces endothelial dysfunction. It inhibits capillary hyperpermeability, decreases blood viscosity, and improves lymphatic drainage—making it the gold-standard therapeutic choice for diabetic retinopathy, chronic venous insufficiency (CVI), and hemorrhoidal syndrome.

Chemical Profile & Specification Summary

Gentolex operates scalable chemical synthesis facilities designed to manufacture Calcium Dobesilate API with absolute batch-to-batch consistency. Below is our standard analytical specification compliance for commercial supply:

  • Chemical Formula: C12H10CaO10S2 · H2O
  • Molecular Weight: 436.43 g/mol
  • Appearance: White or almost white, hygroscopic powder
  • Identification: IR Absorption, Calcium Salt Positive Test
  • Assay (Titration / HPLC): 98.0% ~ 102.0% (Calculated on anhydrous basis)
  • Heavy Metals: ≤ 10 ppm | Related Substances: Hydroquinone ≤ 0.1%
Analytical Test Parameter Pharmacopoeial Requirement (EP / USP / ChP) Gentolex High-Purity OEM Grade Standard Testing Methodology
Assay Content 98.0% - 102.0% 99.2% - 100.8% Potentiometric Titration / HPLC
Hydroquinone Impurity ≤ 0.2% (2000 ppm) ≤ 0.001% (< 10 ppm) HPLC-UV (Reverse Phase)
Water Content (Karl Fischer) 4.0% - 6.0% 4.2% - 5.2% Volumetric Karl Fischer Titration
Sulfated Ash / Residue 17.0% - 19.0% 17.5% - 18.5% Gravimetric Residue Test
Heavy Metals (Pb, Cd, As, Hg) ≤ 20 ppm Total ≤ 5 ppm (ICP-MS Tested) ICP-MS Method
Microbial Enumeration TAMC < 1000 CFU/g TAMC < 100 CFU/g | No E. Coli / Salmonella Microbiological Membrane Filtration

Global B2B Procurement Demand & Market Dynamics

Strategic analysis of microvascular health therapeutics and global supply chain requirements for pharmaceutical brand owners.

Diabetic Retinopathy Scaling Demand

With global diabetes prevalence expected to surpass 700 million adults by 2045, diabetic microvascular complications are escalating rapidly. OEM demand for raw Calcium Dobesilate has risen by 8.4% CAGR globally. Formulators require high-solubility APIs capable of meeting stringent stability tests under Zone IV humid climatic conditions.

Venous Disease & Proctology Trends

Chronic Venous Insufficiency (CVI) impacts over 30% of the adult population worldwide. Calcium Dobesilate oral solid dosages (500mg capsules and tablets) remain primary treatment options. OEM buyers seek integrated CDMO partners who can supply both raw API and license out validated Finished Dosage Form (FDF) dossiers.

Supply Chain Resilience & Regulatory Compliance

Pharma procurement managers prioritize suppliers offering complete regulatory protection: CEP/COS certificates, US FDA DMF filings, and EDQM compliance. Gentolex maintains robust supply continuity, multi-ton synthesis facilities, and localized customer support hubs in Mexico and South Africa.

Technical Roadmap & Process Engineering Excellence

Innovative synthetic routes, strict impurity isolation, and advanced formulation technology.

1. Catalytic Green Synthesis & Hydroquinone Elimination

The conventional sulfonation of hydroquinone often yields toxic residual hydroquinone impurities and unstable color degradation in finished dosage forms. Gentolex's proprietary green chemistry process utilizes catalytic sulfonation under inert nitrogen purging.

Our multi-stage recrystallization protocol systematically reduces residual hydroquinone levels to < 10 ppm, well below standard pharmacopoeial thresholds. This prevents oxidative discolouration, extending the shelf-life of finished tablets and capsules to 36+ months.

2. Advanced Particle Engineering & Modified Release FDF

To optimize oral absorption and reduce gastrointestinal side effects, our CDMO division offers specialized particle micronization and microencapsulation. We engineer customized bulk density and particle size distribution (PSD) profiles tailored to direct-compression tablet manufacturing.

Furthermore, our technical team provides sustained-release matrix development, allowing for 24-hour therapeutic coverage with once-daily dosing regimens for improved patient compliance.

About Gentolex Group & Global Infrastructure

Connecting the world with guaranteed pharmaceutical products, peptide engineering, and full-service procurement solutions.

Gentolex's goal is to create opportunities connecting the world with better services and guaranteed products. Up to date, Gentolex Group has been serving customers from more than 10 countries, specifically establishing dedicated regional offices in Mexico and South Africa to ensure flawless local support, customs clearance assistance, and just-in-time delivery.

Our main services focus on supplying high-purity small molecule APIs, peptide APIs, Custom Peptides synthesis, Finished Dosage Form (FDF) license-out, Technical Support & Consultation, Product Line and Lab Setup, as well as Turnkey Sourcing & Supply Chain Solutions.

Core CDMO & Supply Capabilities:

  • 250,000 m² Construction Area: Modern facility operating strictly under cGMP standards for global scalability.
  • Full Regulatory Dossier (CTD/eCTD): Complete validation protocol, ICH stability data, and DMF registration support.
  • End-to-End Procurement: One-stop chemical and pharmaceutical sourcing to eliminate vendor complexity.
  • Strict Quality Guarantee: Fully equipped testing labs with HPLC, LC-MS, GC-MS, ICP-MS, and NMR verification.

Chemical Products

An overall factory construction area of 250,000 square meters under international standard to offer flexible, scalable and cost-effective chemical solutions.

Pharmaceutical Ingredients

Gentolex offers an extensive range of APIs and intermediates for development study and commercial application with cGMP standard from long-term collaborations. Documents and Certificates are supported worldwide.

Development & Formulation

Comprehensive R&D services from bench-scale synthesis to commercial formulation optimization and FDF license-out packages.

Procurement Service

For clients preferring to avoid dealing with multiple points of contact, we provide customized procurement services with superior supply chain resources.

Global Regulatory & Facility Certifications

Our production lines adhere to WHO-GMP, EU-GMP, US-FDA, and ISO quality management guidelines.

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Frequently Asked Questions (FAQ) for OEM Procurement

Detailed technical answers to common queries raised by pharmaceutical buyers, regulatory officers, and formulators.

What is the standard regulatory compliance status for Gentolex Calcium Dobesilate API?
Gentolex supplies Calcium Dobesilate API produced in cGMP-certified facilities. We provide comprehensive regulatory dossiers including US FDA Drug Master File (DMF), Certificate of Suitability (CEP / COS) documentation, EU GMP certificates, and complete ICH stability study reports (Zone II & Zone IVb).
How does Gentolex control hydroquinone impurities during OEM synthesis?
Hydroquinone is a critical impurity formed during synthesis or degradation. Gentolex utilizes an optimized catalytic reaction mechanism coupled with multi-stage crystallization under inert atmospheric control. This process guarantees residual hydroquinone levels below 10 ppm (0.001%), far surpassing EP/USP limits (≤ 0.2%).
What finished dosage forms (FDF) and OEM/ODM options are available?
We offer full contract manufacturing (CDMO) services for finished formulations, including hard gelatin capsules (250mg, 500mg), film-coated tablets (500mg), and custom sustained-release granules. Services cover blend development, contract packaging (blister/bottle), private labeling, and tech transfer.
What are the packaging and storage requirements for commercial bulk shipments?
Calcium Dobesilate is hygroscopic. Commercial API is packed in double food-grade anti-static polyethylene bags sealed inside tight, light-resistant fiber drums (25 kg/drum). Storage should be maintained below 25°C in dry, well-ventilated warehouse environments.
How can localized support in Mexico and South Africa facilitate regional imports?
Our regional representative centers in Mexico and South Africa provide direct support regarding local health authority registration (e.g., COFEPRIS, SAHPRA), import customs clearance, local currency billing, and safety stock warehousing to minimize supply chain disruption.
What is the typical Minimum Order Quantity (MOQ) and lead time for API procurement?
Standard commercial API MOQ starts at 25 kg (1 drum) for validated commercial partners. R&D evaluation samples (100g - 1kg) are available upon request. Commercial orders ship within 2-3 weeks, with custom synthesis or FDF projects scheduled per project milestone timelines.

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