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Comprehensive chemical evaluation of Synephrine (CAS 94-07-5) manufacturing pathways, chromatography baselines, and quality verification standards across Chinese manufacturing hubs.
CAS 94-07-5, chemically designated as 4-[1-hydroxy-2-(methylamino)ethyl]phenol (Synephrine, C9H13NO2, MW: 167.21 g/mol), represents an indispensable phenethylamine framework. Leading domestic producers implement rigorous stereoselective separation and crystallization techniques to maintain batch-to-batch crystalline matrix uniformity and high stability against photo-oxidation.
Top-tier factories integrate continuous microchannel catalytic reduction over traditional batch reactors. This operational paradigm diminishes impurity profiles such as octopamine and N-methyltyramine analogues, ensuring consistent chromatogram baseline purities ≥99.0% as evidenced by reverse-phase HPLC (RP-HPLC) coupled with high-resolution MS/MS detection.
Export batches to North America and the European Economic Area undergo extensive Inductively Coupled Plasma Mass Spectrometry (ICP-MS) verification. Residual heavy metals (Pb, As, Cd, Hg) are contained below <0.1 ppm, while residual organic solvents are stripped via closed-circuit vacuum dryers to comply strictly with USP, EP, and CP guidelines.
| Analytical Metric | USP / In-House Factory Specification | Methodology / Analytical Instrument |
|---|---|---|
| CAS Registry Number | 94-07-5 (Synephrine Free Base) | Chemical Registry Index Validation |
| Assay Purity (HPLC) | ≥ 98.5% to ≥ 99.5% (Anhydrous Basis) | RP-HPLC, DAD @ 224 nm Detection |
| Melting Range | 184.0 °C – 188.0 °C | Automated Capillary Melting Instrumentation |
| Loss on Drying | ≤ 0.50% | Thermal Vacuum Desiccation @ 105 °C |
| Heavy Metals Limit | ≤ 10 ppm Total (Pb ≤ 1 ppm, As ≤ 0.5 ppm) | ICP-MS Multi-element Trace Analysis |
China's fully integrated upstream fine-chemical supply chain yields unparalleled advantages in lead time predictability, scalability, and regulatory compliance auditability.
Domestic producers maintain direct pipeline integration with primary raw precursors, including phenol and chloroacetyl compounds. This insulated procurement structure shields international buyers from market price volatility and ensures consistent, uncompromised delivery timelines even during global chemical supply crunches.
Modern chemical manufacturing facilities across Hebei, Shandong, and Jiangsu operate under unified environmental emission monitoring zones. Facilities utilize advanced catalytic hydrogenations that discard toxic heavy metal oxidizers, drastically reducing effluent impact while optimizing energy consumption.
With strategic distribution hubs in proximity to Shanghai, Qingdao, and Tianjin ports, Chinese chemical suppliers streamline international customs clearance. From non-dangerous chemical declarations to validated temperature-controlled cargo, supply contracts are executed with absolute transparency.
Analysis of how international life-science formulators, dietary supplement manufacturers, and fine intermediate developers leverage CAS 94-07-5.
Synephrine base functions prominently as an alpha-adrenergic receptor stimulant in energy metabolism formulations. Because of its adrenergic activity profile, bulk procurement requests demand exceptionally rigorous optical density documentation to guarantee enantiomeric specification match without trace contamination.
Beyond finished botanical alternatives, CAS 94-07-5 serves as a core chiral building block in the synthesis of bronchodilators and cardiovascular stimulants. Custom contract manufacturers rely on the raw powder’s predictable reactive amine functional group to synthesize advanced proprietary therapeutic molecules.
Corporate procurement directors in Europe and the Americas are increasingly consolidating tier-2 and tier-3 supplier contracts into direct-from-factory partnerships. This shift eliminates distributor markups, enforces batch accountability through unified standard operating procedures (SOPs), and expedites technical audits.
To eliminate supply chain fraud and assure product conformity, each manufacturing release is validated through a closed-loop quality gateway.
Spectrophotometric and chromatographic evaluation of all precursor raw materials, verifying chemical assay percentages prior to introduction into high-pressure reaction vessels.
Continuous real-time HPLC sampling throughout condensation and catalytic reduction cycles, maintaining intermediate conversion rates above 98.2% with minimal side-chain byproducts.
Purification via temperature-controlled anti-solvent crystallization, effectively expelling amorphous residues and ensuring pristine crystalline powder morphology.
Release testing confirming specific rotation, HPLC purity, melting range, residual solvents (via Headspace Gas Chromatography), and microbial plate enumeration.
Double-layer pharmaceutical-grade low-density polyethylene (LDPE) liners within moisture-impermeable aluminum-barrier drums, purged with dry nitrogen gas for extended shelf life.
Clear technical and logistical answers addressing regulatory clearance, minimum orders, and analytical documentation.
Our standard commercial supply of Synephrine Base maintains a purity benchmark of ≥99.0% as determined by RP-HPLC. Customized crystalline grades reaching ≥99.5% are supplied for specialized pharmaceutical intermediate synthesis upon agreement.
Every delivery includes a batch-specific Certificate of Analysis (COA) containing exact lot assays, FTIR spectrum identification, residual solvent headspace chromatograms, and a compliant 16-section Safety Data Sheet (SDS/MSDS) aligned with GHS standards.
For pre-formulation pilot evaluations, our factory supports evaluation sample quantities from 100 grams to 1 kilogram. For standard commercial contracts, wholesale pricing tiers start at 25-kilogram fiber drums up to full multi-ton container shipments.
Our export documentation division supplies complete tariff code classifications (HS Code 292219), non-dangerous goods declaration certificates, and origin validation paperwork to ensure hassle-free processing through global ports.
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