Explore eight of our primary laboratory-certified synthetic peptides and fine chemical compounds, manufactured under rigorous quality checkpoints and ready for direct contract delivery.
A comprehensive examination of Epistane (2α,3α-Epithio-17α-methyl-5α-androstan-17β-ol), encompassing molecular metrics, thermodynamic stability thresholds, and chromatographic assay parameters.
CAS 3381-88-2 designates a chemically distinct, sulfur-bearing episulfide steroid derivative structurally classified as 2α,3α-epithio-17α-methyl-5α-androstan-17β-ol (commonly referenced as Epistane or Methylepitiostanol). Characterized by an episulfide bridge across the A-ring carbons C2 and C3 coupled with a 17α-methylation, this molecule possesses high metabolic stability and precise receptor selectivity in controlled laboratory model systems.
Commercial-grade suppliers must ensure rigid quality gates to eliminate positional isomers, desulfurized degradation artifacts, and trace heavy metals. As an ISO 9001 certified manufacturer, every lot of CAS 3381-88-2 undergoes triple-point orthogonal validation prior to customs seal issuance.
| Analytical Parameter | Certified Standard Specification | Typical Factory Lot Result | Testing Methodology | Compliance State |
|---|---|---|---|---|
| Chemical Identity (CAS 3381-88-2) | Conforms to reference molecular fingerprint | Conforms (No epimer variation detected) | FTIR / 1H-NMR Spectroscopy | Certified Valid |
| HPLC Chromatographic Purity | ≥ 98.5% (Pharmaceutical Intermediate) | 99.34% - 99.62% | RP-HPLC (C18 Column, UV 210nm) | Exceeds Spec |
| Melting Point Transition | 130.0 °C – 136.0 °C | 132.8 °C – 134.4 °C | Automated Capillary Thermal Stage | Certified Valid |
| Loss on Drying (LOD) | ≤ 0.50% w/w | 0.21% w/w | Gravimetric Desiccation (105 °C, 2h) | Certified Valid |
| Residual Solvent Screening | ICH Guideline Q3C Limits | Ethanol < 250 ppm, Dichloromethane < 50 ppm | Headspace Gas Chromatography | Ultra-Pure |
| Total Heavy Metal Burden | ≤ 10 μg/g | < 2.5 μg/g | Inductively Coupled Plasma Mass Spec (ICP-MS) | Certified Valid |
Why Tier-1 international buyers, compounding laboratories, and academic institutions rely on Chinese precision chemical manufacturing infrastructure to guarantee cost-efficiency, yield continuity, and multi-metric scalability.
The total synthesis of CAS 3381-88-2 relies on foundational steroid sterol precursors, specifically 4-androstenedione and dehydroepiandrosterone (DHEA) intermediates. China hosts the world's most concentrated, biologically integrated diosgenin and phytosterol fermentation base. By controlling the synthesis pathway from initial bio-fermentation directly to thiirane ring formation, our facility eliminates external raw material price volatility, delivering direct factory pricing with unyielding cost predictability.
Our Hebei manufacturing installations feature multi-scale glass-lined and hastelloy cryogenic reaction vessels spanning 50L pilot capacity to 3,000L industrial continuous-flow batch reactors. This allows instantaneous adaptation to enterprise procurement schedules — whether fulfilling custom 100-gram analytical pilot runs or recurring 500-kilogram commercial contracts — with zero lot-to-lot spectroscopic or yield variance.
Traditional episulfide syntheses often struggle with unstable epithio-opening or uncontrolled polymeric side-reactions. Our laboratory engineers utilize proprietary micro-channel catalytic technologies that enforce precise stoichiometric control during sulfur transfer. This green chemistry approach maximizes atomic efficiency, lowers energetic consumption by 32%, and eliminates hazardous thiolate byproduct carries into the terminal crystallized API powder.
Analyzing the multidimensional quality, legal, and operational benchmarks demanded by international biotechnology groups, academic research universities, and industrial pharmaceutical procurement directors.
Enterprise procurement professionals cannot gamble on incomplete certificates or unverified third-party claims. Every export order of CAS 3381-88-2 is accompanied by an audit-ready, GLP-compliant Documentation Dossier:
Modern enterprise purchasing requires agile financial workflows and robust inventory hedging strategies to safeguard against market disruptions:
Navigating dynamic chemical compliance across North America, the European Union, the United Kingdom, and Asia-Pacific through documented classification, export compliance, and secure delivery pathways.
In North America, research chemicals fall under meticulous federal oversight. We supply CAS 3381-88-2 strictly labeled and sold as a reference standard intermediate exclusively intended for In Vitro Laboratory Research and Chemical Synthesis. Our logistics documentation satisfies US TSCA reporting criteria, accompanied by clear Non-Clinical Intended Use Declarations that enable seamless entry through major international ports without clearance logjams.
For cross-border shipments bound for European laboratories and pharmaceutical synthesizers, our products comply with European Chemical Agency (ECHA) registration protocols and UK REACH guidelines. We provide standardized CLP hazard classifications, detailed toxicological datasheets, and validated SDS safety documentation, ensuring corporate environmental health & safety (EHS) officers maintain complete compliance records during internal corporate audits.
Episulfide chemical bonds display sensitivity to prolonged ultraviolet irradiation and elevated ambient temperatures. We utilize industrial vacuum inertization (dry argon/nitrogen purging) within heat-sealed, light-impervious aluminum packaging. Controlled-temperature expedited air freight with continuous digital real-time temperature tracking guarantees that every shipment arrives at client facilities with molecular integrity fully intact.
Documenting the exact scientific and synthetic avenues wherein research institutions deploy high-purity CAS 3381-88-2 as a critical chemical reagent and analytical baseline.
In molecular endocrinology and steroid receptor studies, CAS 3381-88-2 serves as a pivotal reference ligand. Researchers investigate its dual profile: its high binding affinity toward androgen receptor (AR) complexes combined with its unique anti-estrogenic interactions upon estrogen receptor (ERα and ERβ) target domains. Its heterocyclic episulfide ring presents a model system for characterizing steric hindrance and ligand-receptor conformation kinetics.
Because the 2α,3α-epithio motif blocks enzymatic conversion into aromatic estrogenic metabolites, CAS 3381-88-2 is widely utilized in in vitro cytochrome P450 aromatase (CYP19A1) competitive binding assays. Biomedical investigators monitor competitive inhibition coefficients (Ki values) to elucidate anti-proliferative actions on hormone-sensitive tissue cultures without peripheral aromatization confounding variables.
Analytical testing agencies, forensic science institutes, and anti-doping reference laboratories (accredited under ISO/IEC 17025) require ultra-pure, batch-certified CAS 3381-88-2 to formulate calibrated LC-MS/MS and GC-MS retention libraries. High spectral purity is vital for differentiating Epistane from other synthetic epithio-androstane isomers during biological specimen screening.
How automation, digital traceability, green reaction engineering, and tightened regulatory governance are reshaping global active chemical intermediate supply lines over the current decade.
The specialty chemical sector is actively migrating away from traditional large-volume batch tanks toward continuous-flow micro-reactors. In the production of sensitive heterocycle-bearing compounds such as CAS 3381-88-2, continuous flow ensures precise residence times, instant temperature dissipation, and steady stoichiometry, practically eliminating hazardous thermal spikes and dramatically boosting stereospecific isomeric yields.
In response to international concerns regarding fraudulent certificates and adulterated bulk powders, the industry is adopting cryptographic Certificate of Analysis (COA) authentication. Qualified manufacturers are embedding cryptographically signed QR verification codes directly onto batch seals, enabling client QC auditors to instantly pull raw instrument chromatograms directly from secure server archives.
Environmental compliance has become a primary supplier evaluation criterion for multinational purchasing groups. Leading synthesis plants in China are now investing in closed-loop automated solvent recovery assemblies that reclaim over 95% of volatile extraction solvents, minimizing volatile organic compound (VOC) emissions and insulating production lines against local environmental shutdown mandates.
Clear, direct answers regarding technical specifications, minimum order quantities, regulatory compliance status, analytical verification, and global dispatch workflows.
Explore eight additional high-demand research compounds manufactured with rigorous purity benchmarks and supported by comprehensive analytical release documentation.
