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In-depth technical specification, molecular architecture, and analytical parameters
Understanding the molecular dynamics and chemical properties of 4,5-Dithiaoctane is imperative for procurement officers, chemical engineers, and R&D scientists seeking optimal reaction kinetics and product stability. Below is an authoritative technical specification dataset verified by gas chromatography-mass spectrometry (GC-MS) and nuclear magnetic resonance (NMR) spectroscopy standardizations.
| Chemical Specification Parameter | Technical Standard / Value | Testing Method / Analytical Protocol |
|---|---|---|
| IUPAC Name | 1-(Propyldisulfanyl)propane / 4,5-Dithiaoctane | Nomenclature Standardization |
| CAS Registry Number | 629-19-6 | CAS Identification System |
| EINECS / EC Number | 211-079-8 | EU REACH Registration Index |
| Molecular Formula / Weight | $C_6H_{14}S_2$ | 150.31 g/mol | Stoichiometric Calculation |
| Purity (GC Assay) | ≥ 99.0% (Specialty Grade) / ≥ 98.0% (Tech Grade) | Gas Chromatography (FID) |
| Appearance & Physical State | Clear, colorless to light yellow liquid | Visual Inspection |
| Odor Profile | Pungent, characteristic garlic-onion, roasted flavor note | Organoleptic Evaluation (FEMA 3228) |
| Density / Specific Gravity | 0.956 - 0.965 g/cm³ at 20°C | Pycnometer / Digital Density Meter |
| Boiling Point Range | 195°C to 198°C at 760 mmHg | ASTM D1078 Distillation Test |
| Flash Point (Closed Cup) | 73°C (163.4°F) | Pensky-Martens Closed Cup Tester |
| Water Content (Karl Fischer) | ≤ 0.05% w/w | Coulometric Karl Fischer Titration |
| Refractive Index ($n_D^{20}$) | 1.496 - 1.502 | Abbe Refractometer at 20°C |
4,5-Dithiaoctane is primarily synthesized via controlled catalytic oxidation of 1-propanethiol using eco-friendly oxidants, or through the reaction of propyl halides with sodium thiosulfate followed by hydrolytic cleavage. The chemical stability of its S-S bond makes it an efficient donor of sulfur radical species under mild catalytic conditions.
JIMPOCHEM's state-of-the-art distillation columns ensure that residual mono-sulfides, tri-sulfides, and unreacted 1-propanethiol levels are strictly limited to < 0.2%. This precise molecular purity prevents catalyst poisoning during petrochemical hydrotreating processes.
Stored under nitrogen blankets in stainless steel (SS316L) or HDPE-lined drums away from strong oxidizing agents and direct sunlight. Maintains a guaranteed shelf life of 24 months when preserved in tightly sealed containers at temperature ranges of 15°C to 25°C.
Combining 16+ years of chemical innovation with modern digital industrial automation
Established in 2010, JIMPOCHEM CO., LTD is headquartered in the prestigious Chemical Industry Park of Jinan City, Shandong Province. Spanning an expansive operational footprint exceeding 500 acres, our corporate infrastructure integrates advanced synthetic research and development, multi-ton automated batch manufacturing, international sales compliance, and specialized technical support.
As a designated chemical service provider for over 5,000 international enterprises, JIMPOCHEM specializes in high-end fine chemicals, fluorine compounds, pharmaceutical excipients, daily chemical raw materials, and organosulfur molecules. Our modern production facility employs intelligent DCS (Distributed Control Systems) to digitally manage temperature, pressure, and reaction stoichiometry, balancing large-scale industrial output with flexible custom chemical synthesis.
Empowering diverse sector ecosystems through specialized organosulfur chemistry
The global demand for 4,5-Dithiaoctane (Di-n-propyl disulfide) is undergoing accelerated growth driven by expansion in the food flavoring market, stringent international fuel sulfur regulations, and advancements in advanced polymer crosslinking. As industrial end-users seek consistent quality, reliable sourcing from qualified China factories provides significant competitive advantage in terms of cost efficiency, purity consistency, and supply chain security.
Under FEMA 3228 approval, food-grade 4,5-Dithiaoctane is widely utilized by international flavor houses to reconstruct natural savory profiles. It supplies authentic garlic, onion, shallot, meat, and roasted flavor notes in culinary seasonings, gravies, prepared meals, and savory snacks at micro-ppm dosage thresholds.
In oil refining, 4,5-Dithiaoctane acts as an effective presulfiding agent for cobalt-molybdenum (Co-Mo) and nickel-molybdenum (Ni-Mo) hydrodesulfurization (HDS) and hydrocracking catalysts. Its predictable decomposition temperature minimizes thermal shock while ensuring uniform active-site sulfidation.
Serves as a sulfur-donating synthon in the organic synthesis of active pharmaceutical ingredients (APIs), antimicrobial organosulfur complexes, and sulfur-containing heterocyclic building blocks utilized in metabolic research and medicinal chemistry.
Functions as a specialized vulcanization modifier and sulfur donor for synthetic rubber formulations (NBR, SBR, EPDM). It enhances thermal aging resistance, tensile modulus, and flexural fatigue properties in critical automotive seals and industrial hoses.
Emerging research leverages organosulfur disulfides like 4,5-Dithiaoctane as electrolyte additives in next-generation lithium-sulfur batteries to passivate metallic lithium anodes and inhibit polysulfide shuttle degradation effects.
Used as an intermediate in the formulation of specialized agricultural fungicides and plant protection chemical agents, providing controlled biological action against crop pathogens without leaving persistent toxic residues.
Proven operational workflows for seamless integration into downstream industrial plants
Challenge: Flavor formulators face challenges with sulfur volatility and batch-to-batch flavor profile variance when using lower-grade disulfide intermediates containing trace mercaptan impurities.
JIMPOCHEM Solution: We supply FEMA 3228 compliant 4,5-Dithiaoctane purified via ultra-high vacuum fractional distillation. Our batch organoleptic testing guarantees zero mercaptan off-notes, ensuring consistent savory flavor notes in concentrated essence mixtures at concentrations ranging from 0.01 ppm to 5.0 ppm.
Challenge: Refinery operators require a presulfiding compound with low coking tendency and controllable decomposition kinetics to prevent catalyst bed hot-spotting.
JIMPOCHEM Solution: Our technical-grade 4,5-Dithiaoctane decomposes smoothly within the 180°C–240°C temperature window in the presence of hydrogen. This generates active metal sulfides ($MoS_2, WS_2$) with minimal carbon deposition, extending catalyst cycle life by up to 18% compared to conventional dimethyl disulfide (DMDS) alternatives.
Uncompromised adherence to safety, environmental standards, and global supply chain security
JIMPOCHEM provides full regulatory documentation for 4,5-Dithiaoctane (CAS 629-19-6), including complete GHS-compliant Safety Data Sheets (SDS) in multiple languages, Certificates of Analysis (COA) per lot, REACH compliance declarations, and Kosher/Halal certifications for food-grade shipments.
We offer versatile, heavy-duty packaging options designed for dangerous goods (DG) transportation safety:
• 25 kg fluorinated HDPE drums
• 200 kg steel/plastic drums (UN 1993 standard)
• 1,000 kg ISO-tanks for bulk industrial deliveries
To eliminate international shipping bottlenecks, JIMPOCHEM maintains strategic inventory reserves near major Chinese export ports (Qingdao, Shanghai, Tianjin) along with localized warehousing partnerships across North America, Europe, and Southeast Asia to guarantee expedited lead times.
Leading technological innovation toward low-carbon chemical manufacturing
In response to global "dual-carbon" sustainability directives, JIMPOCHEM's chemical research institute is actively implementing solvent-free catalytic oxidation processes for organosulfur synthesis. By replacing stoichiometry-heavy mineral oxidants with atom-economical catalytic air/oxygen systems, our green manufacturing roadmap achieves:
Looking to the future, JIMPOCHEM is partnering with leading international universities to pioneer ultra-high purity 4,5-Dithiaoctane variants (>99.9% purity) specifically engineered for next-generation semiconductor cleaning solvents and solid-state battery electrolytes. Our investment in continuous-flow microreactor technology guarantees scalable precision chemistry for the decade ahead.
Explore our broader chemical synthesis capabilities across daily chemical, fluorine, and medical sectors
Direct answers to critical procurement, technical, and regulatory questions
JIMPOCHEM provides two distinct commercial grades: Specialty Food/Flavor Grade with a GC purity guaranteed at ≥ 99.0%, and Technical Presulfiding Grade with a GC purity guaranteed at ≥ 98.0%. Each production batch is dispatched alongside a comprehensive COA verified by GC-FID and Karl Fischer analysis.
Yes. Our high-purity 4,5-Dithiaoctane (Di-n-propyl disulfide) complies with FEMA 3228 and international food additive safety standards. It is routinely used to formulate savory, garlic, and onion essence profiles in processed foods and seasonings.
4,5-Dithiaoctane offers controlled thermal decomposition between 180°C and 240°C, releasing hydrogen sulfide ($H_2S$) evenly across the catalyst bed. This controlled activation converts metal oxides to active sulfides ($MoS_2/Ni_3S_2$) without localized overheating or premature carbon coking.
4,5-Dithiaoctane is classified as a Class 3 Flammable Liquid (UN 1993, PG III). Containers must be stored in cool, well-ventilated, flame-proof chemical warehouses away from oxidizing materials. We ship in UN-certified 25 kg fluorinated drums, 200 kg steel drums, or 1,000 kg ISO tanks with nitrogen padding.
Yes, we provide 100g to 500g evaluation samples for verified corporate clients and research laboratories upon request. Samples ship via international express under strict dangerous goods sample transport procedures.
Standard lead time for 10 to 20 metric ton orders is typically 7 to 12 working days from order confirmation. Our proximity to Qingdao and Shanghai ports facilitates rapid customs clearance and vessel booking.
Comprehensive direct-factory offerings for chemical procurement professionals
JIMPOCHEM CO., LTD is committed to powering global industrial growth through pure chemical engineering, custom formulation support, and reliable supply chain logistics. Contact our engineering team today for technical data sheets, custom quotes, or batch sample requests.
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