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A comprehensive technical evaluation of 4'-[[4-methyl-6-(1-methyl-1H-benzimidazol-2-yl)-2-propyl-1H-benzimidazol-1-yl]methyl]biphenyl-2-carboxylic acid (Telmisartan core structure / intermediate), detailing chromatographic purity profiling, polymorphic behavior, and industrial manufacturing criteria.
| Analytical Parameter | Technical Specification (Enterprise Standard) | Pharmacopoeial Reference (EP / USP / IP) | Analytical Methodology |
|---|---|---|---|
| Chemical Name (IUPAC) | 4'-[(1,4'-dimethyl-2'-propyl[2,6'-bi-1H-benzimidazol]-1'-yl)methyl]-[1,1'-biphenyl]-2-carboxylic acid | Conforms to Reference Standard | Nuclear Magnetic Resonance (1H-NMR, 13C-NMR) |
| CAS Registry Number | 144701-48-4 | 144701-48-4 Verified | CAS Chemical Registry Verification |
| Molecular Formula & Weight | C33H30N4O2 — 514.62 g/mol | Monoisotopic Mass: 514.2369 Da | High-Resolution Mass Spectrometry (HRMS-ESI) |
| Physical Appearance | White to slightly yellowish crystalline powder | Off-white crystalline solid | Visual Inspection under 1000 Lux Light Box |
| Chromatographic Assay (HPLC) | 99.0% – 101.0% (anhydrous basis) | 98.5% – 101.5% | Reversed-Phase HPLC-DAD at 298 nm |
| Individual Impurity | ≤ 0.10% (Impurity A, B, C, D) | ≤ 0.15% | Gradient RP-HPLC (C18 250×4.6mm, 5μm) |
| Residual Solvents (ICH Q3C) | Methanol <3000ppm, Toluene <890ppm, DMF <880ppm | ICH Class 2 & Class 3 Limits | Headspace Gas Chromatography (GC-FID) |
| Loss on Drying (LOD) | ≤ 0.50% w/w | ≤ 1.0% w/w | Vacuum Drying Oven at 105°C to Constant Weight |
| Heavy Metals / Residue on Ignition | Residue ≤ 0.1%, Heavy Metals ≤ 10 ppm | ≤ 0.1% / ≤ 20 ppm | ICP-OES / Sulfated Ash Gravimetric Test |
China's comprehensive fine chemical manufacturing framework offers an irreplaceable synthesis ecosystem, combining raw precursor self-sufficiency, micro-reaction engineering, and economies of scale.
Chinese factories located across Hebei, Shandong, and Jiangsu chemical industrial parks produce key raw building blocks in-house, such as 4-methyl-2-propyl-1H-benzimidazole-6-carboxylic acid and biphenyl-2-carboxylic acid derivatives. This vertical synthesis integration mitigates intermediate supply volatility, stabilizes raw material costs, and shields global B2B clients from price surges.
Top-tier Chinese plants have transitioned from traditional multi-ton glass-lined batch reactors to advanced continuous-flow micro-channel technology. For the key alkylation and biphenyl coupling steps in CAS 144701-48-4 synthesis, micro-reactors provide precise heat transfer, eliminating localized hot spots, minimizing thermal decomposition, and suppressing critical regioisomeric impurities below 0.05%.
Modern Chinese manufacturers operate inside state-approved Class-A national chemical parks equipped with integrated tertiary wastewater treatment facilities, regenerative thermal oxidizers (RTO) for VOC containment, and automated fire-suppression systems. Complete environmental compliance ensures unhindered year-round manufacturing without winter curtailment risks.
Close proximity to prime deep-water container ports including Shanghai, Qingdao, and Tianjin allows Chinese suppliers to dispatch CAS 144701-48-4 orders efficiently under CIF, CFR, FOB, and DDP terms. Utilizing UN-certified anti-static drum packing, inert vacuum foil linings, and calibrated temperature loggers, products reach pharmaceutical clients across the EU, North America, India, and Latin America safely.
Every commercial batch produced is governed by documented SOPs, batch manufacturing records (BMR), and automated SCADA logging. Facilities provide full regulatory documentation packages, including raw analytical chromatograms, IR spectra, structural NMR assignments, elemental analysis, and stability reports conforming to ICH Q1A(R2) climatic testing protocols.
A rigorous examination of shifting pharmaceutical sourcing trends, generic API supply chain resilience, and integrated CDMO scale-up solutions for international pharmaceutical innovators.
As cardiovascular disease (CVD) morbidity continues to grow globally, Angiotensin II Receptor Blockers (ARBs) like Telmisartan remain first-line antihypertensive agents celebrated for their prolonged 24-hour elimination half-life and dual PPAR-gamma partial agonism. Sourcing pure CAS 144701-48-4 as an active pharmaceutical ingredient or key precursor is experiencing continuous 6.8% CAGR across developing and developed economies.
Following historical global recalls of sartan compounds due to NDMA and NDEA mutagenic impurities, Chinese manufacturers re-engineered the CAS 144701-48-4 synthetic route to bypass azide-based tetrazole formations entirely. Because CAS 144701-48-4 utilizes a carboxylic acid moiety instead of a tetrazole ring, nitrosamine risks are structurally non-existent, presenting substantial regulatory advantages for dossier submissions.
Due to the low aqueous solubility of CAS 144701-48-4 across physiological pH, commercial drug product manufacturers demand customized physical specifications. Chinese CMO/CDMO partners offer tailored jet-milling micronization (D90 < 10 µm or D50 < 3 µm), spray-dried solid dispersion development with alkalizing excipients (e.g., meglumine, sodium hydroxide), and proprietary polymorph stabilization.
How qualified Chinese chemical manufacturers ensure analytical accuracy, prevent cross-contamination, and guarantee audit-proof delivery for overseas buyers.
Spectroscopic authentication of raw benzimidazole coupling blocks, TLC and HPLC screening for trace secondary amines, and stringent testing for heavy metal catalysts (Palladium, Nickel) before synthesis initiation.
Real-time in-process HPLC tracking during condensation and saponification stages, maintaining conversion efficiency above 98.5% while monitoring intermediate pH, temperature, and stirring shear stress.
Multi-stage solvent recrystallization yielding the thermodynamically stable Form A polymorph. Particle morphology is controlled to prevent solvent entrapment, yielding consistent dissolution kinetics.
Complete lot testing via calibrated HPLC-UV, Headspace GC-FID, Karl Fischer water titration, and XRD polymorphic fingerprinting. Every drum is assigned a unique batch number mapped to analytical data.
Examining laboratory research, active formulation manufacture, and complex API combination therapies utilizing this versatile biphenyl-benzimidazole derivative.
Formulated into 20 mg, 40 mg, and 80 mg clinical-strength oral solid dosage tablets. In this setting, CAS 144701-48-4 blocks the vasoconstrictor and aldosterone-secreting effects of angiotensin II by selectively inhibiting angiotensin II binding to the AT1 receptor in vascular smooth muscle and adrenal gland tissues.
Extensively combined with calcium channel blockers (e.g., Amlodipine Besylate) or thiazide diuretics (e.g., Hydrochlorothiazide). Sourcing high-bulk-density CAS 144701-48-4 powder prevents layer separation, segregation during high-speed rotary tableting, and ensures content uniformity compliance per USP <905>.
Beyond hemodynamics, scientific research institutes procure reference-grade CAS 144701-48-4 to study structural activation of Peroxisome Proliferator-Activated Receptor Gamma (PPAR-γ). Investigations analyze insulin sensitivity, lipid metabolism modulation, and anti-inflammatory pathways in vascular endothelial cell cultures without causing typical glitazone-associated fluid retention.
Direct technical and operational answers to the most common questions raised by pharmaceutical purchasers, QC auditors, and chemical import specialists.
Standard commercial production batches from qualified Chinese plants maintain an HPLC chromatographic purity of ≥ 99.0%, with premium pharmaceutical-grade lots reaching ≥ 99.5%. No single known or unknown impurity exceeds 0.10%, fully conforming to ICH Q3A guidelines and EP/USP monographic requirements.
Every delivery includes a batch-specific Certificate of Analysis (COA) containing exact test results (not just "conforms"), accompanied by HPLC chromatograms, mass spectra (MS), 1H-NMR spectra, Safety Data Sheet (SDS) conforming to GHS Revision 8, and Certificate of Origin (COO). Drug Master File (DMF) technical packages and Open Part CTD dossiers are available for qualified formulation partners.
Unlike Valsartan, Losartan, or Irbesartan, the molecular structure of CAS 144701-48-4 incorporates a carboxylic acid moiety rather than a tetrazole ring. The synthetic pathway completely avoids sodium azide, nitrous acid, and secondary amines, preventing the generation of carcinogenic nitrosamines (NDMA, NDEA). A detailed Nitrosamine Risk Assessment report is supplied with each audit file.
Standard export packaging consists of 25 kg UN-rated fibre drums containing double-layer food-and-pharma grade polyethylene bags sealed under nitrogen, reinforced with an intermediate aluminum foil moisture-barrier pouch. Desiccant packs and temperature-monitoring indicators are included for transcontinental air and sea transit.
Evaluation samples for laboratory validation, impurity isolation, and formulation R&D are available starting at 100g to 1 kg. Commercial scale production runs feature standard MOQs of 25 kg (one standard drum). In-stock inventory typically dispatches within 3-5 business days; fresh campaign production requires 2-3 weeks from purchase order confirmation.
Shippers provide compliant HS Code declarations (typically 2933990099 for heterocyclic compounds with nitrogen hetero-atoms), certified proforma invoices, non-dangerous goods declaration certificates (DGM), and detailed packing lists. Our dedicated logistics desk supports DDP (Delivered Duty Paid) arrangements across North America, Europe, and Southeast Asia to guarantee friction-free clearance.
In addition to cardiovascular APIs, explore our certified catalog of bioactive peptides, hormone standards, and specialty raw materials manufactured for global research institutes.
