2-Pyrazin-2-Ylethanethiol for Leather Accords: Trace Metal Chelation & Oxidation Control
Technical Specifications and Purity Grades of 2-Pyrazin-2-ylethanethiol (CAS 35250-53-4) for Leather Accords
In the formulation of leather accords, the selection of high-purity sulfur-containing compounds is critical to achieving both olfactory fidelity and long-term stability. 2-Pyrazin-2-ylethanethiol, also known as 2-pyrazinylethylmercaptan or mercaptoethylpyrazine, is a pyrazine derivative that imparts the characteristic roasted, smoky, and slightly meaty nuances essential to authentic leather profiles. As a flavor precursor and key intermediate, its industrial purity directly influences the final accord's performance. NINGBO INNO PHARMCHEM CO.,LTD. supplies this compound under strict quality control, with typical purity levels exceeding 98% as determined by GC analysis. However, for demanding applications, higher grades are available upon request. The table below summarizes the standard technical parameters and available grades.
| Parameter | Standard Grade | High Purity Grade |
|---|---|---|
| CAS Number | 35250-53-4 | 35250-53-4 |
| Molecular Formula | C6H8N2S | C6H8N2S |
| Molecular Weight | 140.21 g/mol | 140.21 g/mol |
| Appearance | Colorless to pale yellow liquid | Colorless liquid |
| Assay (GC) | ≥ 98% | ≥ 99% |
| Moisture (KF) | ≤ 0.5% | ≤ 0.2% |
| Typical Use | Fragrance blending, R&D | High-end perfumery, captive accords |
These specifications are representative; for exact batch data, please refer to the batch-specific COA. The compound's role as a mercaptoethylpyrazine makes it particularly sensitive to metal-catalyzed oxidation, a challenge addressed in the next section.
Trace Metal Chelation Mechanisms: Enhancing Oxidative Stability in Fragrance Formulations
Oxidative degradation is a primary concern when working with thiol-containing aroma chemicals like 2-pyrazin-2-ylethanethiol. Trace metals, even at ppb levels, can catalyze the formation of disulfides and other off-odor compounds, compromising the leather accord's integrity. While the compound itself is not a chelating agent, understanding chelation chemistry is vital for formulators. In the broader context of antioxidant strategies, chelating agents such as EDTA, citric acid, or phosphates are often employed to sequester pro-oxidant metals like iron and copper. For instance, in related fields, chondroitin sulfates chelated with divalent metal ions have shown enhanced radical scavenging activities (Ajisaka et al., 2016). This principle can be applied to fragrance formulations: by incorporating a suitable chelator, the oxidative stability of 2-pyrazin-2-ylethanethiol in the final product is significantly improved. Our technical team recommends evaluating the metal content of all raw materials and using chelating agents where necessary. This proactive approach ensures that the leather accord remains true to its intended character throughout the product's shelf life. For a deeper dive into oxidation control during bulk storage, refer to our article on Bulk 2-Pyrazin-2-Ylethanethiol: Winter Crystallization & Oxidation Control.
Batch-Specific COA Parameters and Non-Standard Behavior in Bulk Handling
Beyond standard specifications, field experience reveals non-standard behaviors that can impact large-scale operations. One such parameter is the compound's viscosity profile at sub-zero temperatures. While 2-pyrazin-2-ylethanethiol remains liquid at room temperature, its viscosity increases noticeably below 5°C, which can affect pumping and transfer operations in unheated warehouses. This is not a purity defect but a physical characteristic of the pyrazinyl ethanethiol structure. Additionally, trace impurities, particularly from the synthesis route, can influence the color of the final product. Even within the accepted purity range, slight variations in the levels of pyrazineethanethiol isomers may lead to a pale yellow tint that is otherwise absent in higher-purity cuts. For applications where color is critical, we recommend specifying the high purity grade. Another edge-case behavior is the potential for crystallization under prolonged cold storage. Although the melting point is below -20°C, slow nucleation can occur in the presence of seed crystals. Our logistics team addresses this by ensuring proper insulation and temperature monitoring during winter shipments, as detailed in our dedicated article on 2-Pyrazin-2-Ylethanethiol Bei Der Hochtemperatur-Maillard-Aromaverkapselung. Always consult the batch-specific COA for the exact assay, moisture, and appearance before use.
Industrial Packaging and Logistics: IBC, 210L Drums, and Supply Chain Reliability
For industrial-scale procurement, packaging integrity and logistics are as important as chemical purity. NINGBO INNO PHARMCHEM CO.,LTD. offers 2-pyrazin-2-ylethanethiol in standard 210L steel drums and 1000L IBC totes, both with appropriate UN-rated closures and nitrogen blanketing to prevent oxidative degradation during transit. Our supply chain is designed for reliability, with safety stock maintained for regular customers and flexible shipping options from our Ningbo facility. We do not claim EU REACH compliance, but we ensure that all packaging meets international transport regulations for hazardous chemicals. For bulk price inquiries and to discuss your specific logistics requirements, please contact our sales team. As a global manufacturer, we understand the importance of consistent quality and on-time delivery, making us a preferred partner for R&D managers and procurement specialists alike.
Frequently Asked Questions
What is the minimum order quantity (MOQ) for 2-pyrazin-2-ylethanethiol?
Our standard MOQ is 1 kg for sample requests and 25 kg for commercial orders. For larger volumes, we offer flexible terms. Please contact us for a tailored quote.
How should 2-pyrazin-2-ylethanethiol be stored to maintain stability?
Store in a cool, dry, and well-ventilated area away from direct sunlight and sources of ignition. Keep containers tightly closed under nitrogen to prevent oxidation. Recommended storage temperature: 2–8°C for long-term stability.
Can you provide a certificate of analysis (COA) for each batch?
Yes, every shipment includes a batch-specific COA detailing assay, moisture, appearance, and any other relevant parameters. Please refer to the COA for the exact specifications of your batch.
What is the typical lead time for bulk orders?
Lead times vary depending on order size and destination. Generally, for stocked items, dispatch occurs within 1–2 weeks after order confirmation. Custom synthesis or large-volume orders may require additional time.
Is 2-pyrazin-2-ylethanethiol compatible with common fragrance solvents?
Yes, it is soluble in most organic solvents such as ethanol, dipropylene glycol, and isopropyl myristate. Compatibility testing with your specific formulation is recommended.
Sourcing and Technical Support
Selecting the right source for 2-pyrazin-2-ylethanethiol is a strategic decision that impacts your product's quality and time-to-market. With our deep expertise in pyrazine derivatives and sulfur-containing compounds, NINGBO INNO PHARMCHEM CO.,LTD. offers not just a product but a partnership. From custom synthesis to bulk supply, our team provides technical support to optimize your leather accord formulations. For more information, visit our product page: high-purity 2-pyrazin-2-ylethanethiol for flavor and fragrance applications. Partner with a verified manufacturer. Connect with our procurement specialists to lock in your supply agreements.