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Comprehensive technical whitepaper on molecular structure, synthesis metrics, and industrial standards for global buyers and chemical engineers.
Di-n-propyl disulfide (also recognized as Propyl disulfide, 1-(propyldisulfanyl)propane, or Dipropyl disulfide, CAS Number: 629-19-6) is a symmetric aliphatic organosulfur compound characterized by a disulfide bridge connecting two n-propyl carbon chains. With the molecular formula C6H14S2 and a molecular weight of 150.31 g/mol, it exhibits a distinct, pungent, roasted onion and garlic aroma profile, making it a pivotal building block in both food flavor chemistry and heavy industrial chemical processing.
As a leading China Di-n-propyl disulfide manufacturer, JIMPOCHEM provides technical-grade, flavor-grade (FEMA 3228), and ultra-pure continuous-flow synthesized batches optimized for severe industrial environments, including hydrotreating catalyst presulfiding, rubber modification, and specialty agrochemical synthesis.
| Parameter Property | Technical Standard Specification | Testing Standard / Method |
|---|---|---|
| Chemical Name | Di-n-propyl disulfide / Propyl disulfide | IUPAC Standard Nomenclature |
| CAS Registry Number | 629-19-6 | CAS Chemical Registry Index |
| EINECS / EC Number | 211-093-4 | EU REACH System Identification |
| FEMA Number | 3228 | Flavor and Extract Manufacturers Association |
| Assay Purity (GC) | ≥ 98.0% (Industrial) / ≥ 99.0% (Flavor Grade) | Gas Chromatography (FID Detector) |
| Physical Appearance | Clear, colorless to light yellow transparent liquid | Visual Inspection (25°C) |
| Density / Specific Gravity | 0.955 – 0.965 g/cm³ at 20°C | Pycnometer Method (ASTM D4052) |
| Boiling Point | 195.0 °C – 198.0 °C at 760 mmHg | Distillation Range (ASTM D86) |
| Flash Point | 65.0 °C (149.0 °F) - Closed Cup | Pensky-Martens Closed Cup (ASTM D93) |
| Refractive Index (n20/D) | 1.495 – 1.503 | Abbe Refractometer at 20°C |
| Solubility Profile | Insoluble in water; highly soluble in alcohol, ether, benzene, oils | Standard Solvent Miscibility Test |
How Di-n-propyl Disulfide powers petrochemical, food science, polymer, and agricultural chemical production worldwide.
Under FEMA 3228 regulation, Di-n-propyl disulfide is an indispensable flavor additive used to create authentic Allium sensory profiles (onion, garlic, shallot, leek, and cooked meat broths). Its extremely low odor threshold allows flavor chemists to synthesize natural-identical savory top notes in seasonings, canned soups, processed meats, and snack coatings with micro-ppm dosing precision.
In modern petroleum refining, hydrodesulfurization (HDS) and hydrocracking catalysts (Ni-Mo, Co-Mo on alumina matrix) require precisely controlled presulfiding prior to hydrocarbon feed introduction. Di-n-propyl disulfide serves as a high-efficiency sulfur donor agent, decomposing predictably at low temperatures without leaving carbonaceous coking deposits, maximizing active metal sulfide phase formation.
Organosulfur chemistry plays a growing role in next-generation crop protection products. Di-n-propyl disulfide acts as a critical precursor for propylthio intermediate syntheses, which are subsequently converted into specialized nematicides, soil fungicides, and selective herbicides requiring high chemical stability and bio-selectivity.
Di-n-propyl disulfide acts as a molecular weight regulator and chain transfer agent during synthetic rubber and elastomer polymerization. Furthermore, its chemical stability and distinct olfactory signature make it a reliable industrial gas odorant marker and leak detection tracing agent for specialized underground piping systems.
Next-generation green chemical manufacturing: Moving from traditional batch reactors to continuous-flow microfluidic synthesis.
Utilizing eco-friendly hydrogen peroxide (H2O2) oxidation of 1-propanethiol over modified heterogeneous solid catalysts, eliminating hazardous chemical byproducts.
Implementation of precise continuous-flow microreactors that control exothermic reaction kinetics in milliseconds, enhancing yield to > 99.2% while drastically improving plant safety.
Multistage fractional vacuum distillation columns separate trace sulfur impurities, producing ultra-high purity grades suitable for sensitive electronic and pharmaceutical synthesis.
R&D initiatives focused on deriving 1-propanethiol from renewable agricultural biomass routes, reducing net carbon footprint and ensuring zero-waste sulfur recycling.
Why Tier-1 chemical buyers choose JIMPOCHEM in Shandong Chemical Industrial Park for global procurement reliability.
Located in the heart of Jinan Chemical Industry Zone, JIMPOCHEM maintains direct pipeline raw material linkages with sulfur recovery and olefin cracking plants. This upstream integration guarantees raw material security even during global supply shocks.
Our 500+ acre manufacturing base leverages fully automated Distributed Control Systems (DCS) and digital batch monitoring. Every process variable—temperature, pressure, feed rates—is controlled within strict tolerances, ensuring batch-to-batch consistency.
We provide versatile packaging tailored to hazardous chemical transport standards (Class 3 Flammable Liquid UN 2381 / UN 1993 specifications), including 200kg steel drums, 1000kg IBC totes, and 20-ton stainless steel ISO Tanks.
JIMPOCHEM CO., LTD was established in 2010 and is headquartered in the Chemical Industry Park of Jinan City, Shandong Province. The company covers an area of over 500 acres and is a professional chemical raw material manufacturer that integrates research and development, production, sales, and technical services. Its core focus is on high-end fine chemicals and cosmetic raw materials.
We have obtained multiple product-related certifications, including ISO 9001 Quality System Certification and ISO 14001 Environmental Management System Certification, and are committed to providing high-quality chemical products and one-stop procurement service solutions to global customers.
Our core team comprises experts with over 16 years of experience in the chemical industry. This enables us not only to provide professional products but also to offer solutions in product development, formula optimization, and supply chain management, meeting the personalized needs of diverse clients. Exported to over 200 countries and regions, serving more than 5,000 international companies as a trusted designated chemical service provider.
Integrated R&D, production, and custom synthesis solutions across diverse market verticals:
Ensuring regulatory confidence across European REACH, US FDA, and Asia-Pacific import standards.
Every single batch of Di-n-propyl disulfide (CAS 629-19-6) undergoes high-resolution GC-MS analysis, Karl Fischer titration, and refractometry testing. Batch Certificates of Analysis (COA), Safety Data Sheets (SDS - GHS compliant), and REACH registration documentation are delivered with each shipment.
In accordance with global dual-carbon mandates, our zero-emission wastewater treatment systems convert toxic sulfur off-gases into usable sulfate salts. Downstream users receive eco-certified chemical raw materials that pass strict environmental audit inspections.
Beyond bulk chemical manufacturing, JIMPOCHEM offers tailored organosulfur synthesis services, customizing purity parameters, specialized solvent ratios, and customized container packaging to optimize downstream reaction yields.
Direct answers to common engineering, compliance, logistics, and technical application inquiries.
Di-n-propyl disulfide should be stored in tightly sealed, light-resistant containers in a cool, well-ventilated warehouse away from direct sunlight, open flames, strong oxidizers, and strong alkalis. Storage temperature should ideally be maintained below 30°C. Storage vessels should be stainless steel (316L) or high-density fluorinated polymer lined drums.
It provides controlled, low-temperature thermal decomposition (initiating decomposition around 180°C–220°C) without generating carbon foulants or free carbon black. This enables catalyst beds to convert active nickel/cobalt oxides into highly active metal disulfide phases efficiently, extending catalyst operating lifespan.
Yes. Our high-purity flavor-grade Di-n-propyl disulfide (Purity ≥ 99.0%) fully complies with FEMA 3228 and EU Flavouring Regulation standards. We supply full allergen declarations, Kosher, Halal, and food safety management documentation upon request.
Standard packaging MOQ is 200 kg (1 drum). For commercial contract orders, lead time from our Jinan plant to major China shipping ports (Qingdao/Shanghai) is 3 to 7 business days, with full maritime hazardous cargo certification (IMO Class 3/UN 1993 handling).
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