L-Liothyronine 6893-02-3 — China API Manufacturer | EP USP R&D to Production

China Manufacturing Landscape for L-Liothyronine

L-Liothyronine (CAS 6893-02-3), the free acid form of the active thyroid hormone triiodothyronine (T3), is a critical pharmaceutical compound used in the treatment of hypothyroidism, myxedema coma, and as a diagnostic agent in thyroid suppression tests. China has developed specialized manufacturing capabilities for iodinated amino acid derivatives, with our production facility serving as a reliable source of pharmaceutical-grade L-Liothyronine for formulators and API distributors worldwide.

The production of thyroid hormone APIs requires precise control of iodination chemistry and stringent quality management to ensure consistent potency and purity. Our facility has invested in dedicated synthesis infrastructure and analytical capabilities specifically designed for iodothyronine compound production, combining technical expertise with the cost advantages of Chinese manufacturing to serve the global generic pharmaceutical market.

Manufacturing Process & Facility Overview

L-Liothyronine synthesis at our facility employs a controlled iodination approach starting from L-thyronine, utilizing selective diiodination chemistry to introduce iodine atoms at the 3,5-positions of the outer phenolic ring and the 3-position of the inner ring. The process is conducted in glass-lined reactors under precisely controlled temperature and pH conditions to achieve the required regioselectivity and minimize formation of over-iodinated by-products.

The manufacturing suite features dedicated reaction vessels with advanced temperature control systems, chromatographic purification equipment for removal of iodination isomers and unreacted starting materials, controlled crystallization systems for polymorph-consistent product, and validated drying equipment. The production area operates under controlled pharmaceutical conditions with light-protected processing zones, as L-Liothyronine is sensitive to photodegradation. Environmental controls include specialized waste treatment for iodine-containing effluents.

Quality Standards & Multi-Pharmacopeial Compliance

Our L-Liothyronine API is manufactured and tested in compliance with European Pharmacopoeia (EP) and United States Pharmacopeia (USP) monograph specifications for Liothyronine. The analytical control program includes assay by validated HPLC method (purity ≥95.0%), identification by IR spectroscopy and specific HPLC retention time, related substances analysis including monitoring of diiodothyronine and tetraiodothyronine (thyroxine) content, specific optical rotation measurement, loss on drying, residue on ignition, and heavy metals determination.

Due to the high potency of thyroid hormones and the narrow therapeutic index of thyroid preparations, our quality control program includes enhanced controls for assay precision and content uniformity support. The QC laboratory operates specialized HPLC methods with UV detection optimized for iodothyronine analysis, and maintains complete reference standard libraries for all known related substances.

Regulatory Documentation & Export Support

Complete regulatory documentation packages are available to support customer drug registration activities worldwide. Standard documentation includes Drug Master File (DMF) references, batch-specific Certificates of Analysis, MSDS/SDS in GHS format, stability study data under ICH long-term and accelerated conditions, process validation documentation, and detailed analytical method validation reports. We can provide additional technical data packages as needed for specific regulatory submission requirements.

Our regulatory affairs team has experience supporting customer registrations across major regulated and emerging markets, and provides responsive technical support throughout the registration lifecycle including query responses and post-approval change management documentation.

Packaging & Global Logistics

L-Liothyronine is packaged in amber glass bottles with PTFE-lined closures, sealed under nitrogen atmosphere, and placed in secondary light-protective containers. Standard packaging units include 100 g, 500 g, and 1 kg configurations. Due to the light sensitivity and high potency of the compound, all packaging operations are conducted under reduced lighting conditions with strict containment protocols. Each package carries complete batch traceability and is labeled in compliance with GHS requirements.

International shipping is arranged through pharmaceutical-specialized logistics providers with temperature-controlled options (15-25°C) as standard. We offer FOB, CIF, and DDP Incoterms with routing through Shanghai for both air and ocean freight. Typical delivery times are 5-7 business days by air and 20-28 days by ocean freight to major global destinations.

Competitive Pricing & Supply Reliability

Our specialized manufacturing capabilities and efficient production processes enable competitive competitive pricing for L-Liothyronine API. We offer flexible pricing structures accommodating both development-stage quantities and commercial-scale procurement, with volume-based discounts and long-term supply agreement options. Our pricing reflects the value proposition of direct manufacturer access without intermediary margins.

Supply reliability is maintained through planned production campaigns, strategic intermediate inventory, and careful raw material management. Our dedicated thyroid hormone production line operates with a track record of consistent quality and on-time delivery exceeding 96% across all international customer accounts.

L-Liothyronine Technical Specifications