Sourcing 5,7-Dihydro-2-Methylthieno[3,4-D]pyrimidine: B2B Guide
Technical Specifications and Purity Grades of 5,7-Dihydro-2-methylthieno[3,4-d]pyrimidine
As a heterocyclic compound widely utilized in flavor and fragrance formulations, 5,7-dihydro-2-methylthieno[3,4-d]pyrimidine (CAS 36267-71-7) demands rigorous quality control. This thienopyrimidine derivative is typically supplied as a yellow crystalline solid with a melting point range of 65–65.4°C, though slight variations may occur depending on the synthesis route. Industrial buyers should note that standard commercial grades offer a purity of 98% minimum, verified by HPLC and HNMR. For applications requiring higher olfactory precision, such as in premium food flavorings, custom synthesis can achieve purities exceeding 99%. The compound's characteristic popcorn and roasted almond aroma makes it a valuable organic building block in savory flavor profiles.
When evaluating suppliers, it is critical to confirm the analytical methods used for purity determination. Our 5,7-dihydro-2-methylthieno[3,4-d]pyrimidine is consistently produced with a purity of 98% or higher, supported by batch-specific COA documentation. The table below summarizes key technical parameters from industry sources and our internal specifications:
| Parameter | Typical Value | Our Specification |
|---|---|---|
| CAS Number | 36267-71-7 | 36267-71-7 |
| Molecular Formula | C7H8N2S | C7H8N2S |
| Molecular Weight | 152.22 g/mol | 152.22 g/mol |
| Appearance | Yellow crystalline solid | Yellow crystalline solid |
| Melting Point | 65–65.4°C | 65–65.4°C |
| Purity (HPLC) | 98% min | 98% min |
| Boiling Point | 280.8°C | 280.8°C |
| Flash Point | 123.6°C | 123.6°C |
For those seeking a drop-in replacement for established sources, our product matches the technical profile of major suppliers while offering competitive bulk pricing and flexible logistics. As discussed in our article on Sigma-Aldrich Drop-In-Ersatz: 5,7-Dihydro-2-Methylthieno[3,4-D]Pyrimidin, we ensure identical performance without compromising on quality.
Certificate of Analysis (COA) Parameters and Batch Consistency
A robust Certificate of Analysis is the cornerstone of quality assurance in B2B transactions. For 5,7-dihydro-2-methylthieno[3,4-d]pyrimidine, the COA should detail at minimum: appearance, melting point, purity (HPLC area%), and residual solvents. Our manufacturing process emphasizes batch-to-batch consistency, with strict control over trace impurities that could affect organoleptic properties. While standard COAs report purity, we also monitor non-chromophoric impurities that may influence color stability over time. Buyers should request a sample COA to verify that the analytical methods align with their internal specifications.
In field applications, even minor deviations in impurity profiles can alter the perceived aroma intensity. Our technical support team provides guidance on interpreting COA data, ensuring that the material meets the exacting standards of flavor houses. For large-volume procurement, we offer pre-shipment samples and retain samples for each batch, enabling full traceability. This commitment to quality assurance is integral to our role as a global manufacturer of fine chemicals.
Industrial Handling, Storage, and Bulk Packaging Solutions
Proper storage is essential to maintain the integrity of 5,7-dihydro-2-methylthieno[3,4-d]pyrimidine. The compound should be stored in tightly sealed containers, away from light, and at room temperature. While refrigeration can extend shelf life, it is not mandatory for short-term storage. However, for long-term inventory, refrigerated conditions (2–8°C) are recommended to prevent thermal degradation. Our standard packaging includes 25 kg fiber drums with inner PE liners, suitable for most industrial applications. For larger quantities, we offer 210L steel drums and IBC totes, ensuring safe and efficient transport.
Logistics planning must account for the compound's melting point. In warmer climates, there is a risk of softening or partial melting during transit. We mitigate this by using insulated packaging and, upon request, temperature-controlled shipping. Our logistics team can advise on the most cost-effective solutions for your region, balancing protection with freight costs. As detailed in our article on Formulating 5,7-Dihydro-2-Methylthieno[3,4-D]Pyrimidine: Cold-Chain Crystallization & Fixative Stability, understanding thermal behavior is key to preserving product quality.
Non-Standard Parameters: Field Observations on Crystallization and Thermal Behavior
Beyond standard specifications, hands-on experience reveals nuanced behaviors that impact industrial handling. One such observation is the compound's tendency to form supercooled melts. When heated above its melting point and then cooled, it may remain liquid well below 65°C, only crystallizing upon agitation or seeding. This can complicate drum emptying if not anticipated. We recommend pre-warming containers to 70–75°C before transfer to ensure complete liquefaction and avoid residue.
Another field note concerns trace impurities affecting color. While the pure compound is a pale yellow solid, exposure to air or light over extended periods can lead to slight darkening. This does not necessarily indicate degradation of the active molecule but may be unacceptable for certain flavor applications. Our production process includes an inert atmosphere step to minimize oxidative byproducts, resulting in a more color-stable product. For customers requiring the highest olfactory fidelity, we can provide material with controlled color specifications upon request.
Supply Chain Reliability and Drop-in Replacement Strategy
In today's volatile market, supply chain resilience is paramount. As a dedicated manufacturer of 5,7-dihydro-2-methylthieno[3,4-d]pyrimidine, we offer a reliable alternative to traditional sources. Our product is designed as a seamless drop-in replacement, matching the technical specifications of leading brands. This strategy allows formulators to switch without requalification delays, reducing downtime and cost. We maintain safety stock of key intermediates to buffer against disruptions, and our multi-site production capability ensures continuity.
For procurement managers, the decision to dual-source or switch suppliers often hinges on total cost of ownership. Our competitive bulk pricing, combined with flexible MOQs and just-in-time delivery options, provides a compelling value proposition. We also offer custom synthesis services for modified thienopyrimidine derivatives, supporting innovation in flavor chemistry. By partnering with us, you gain not just a supplier but a technical collaborator invested in your success.
Frequently Asked Questions
What is the minimum order quantity (MOQ) for 5,7-dihydro-2-methylthieno[3,4-d]pyrimidine?
Our standard MOQ is 1 kg for sample evaluation. For commercial production, we typically supply in 25 kg drums, but we can accommodate smaller or larger quantities based on project needs. Contact our sales team for a tailored quotation.
How do you ensure batch-to-batch consistency in aroma profile?
We employ rigorous in-process controls and final product testing using both HPLC and olfactory evaluation by trained panels. Each batch is compared against a reference standard to ensure the characteristic popcorn and roasted notes are consistent.
What documentation do you provide with each shipment?
Every shipment includes a Certificate of Analysis (COA), Certificate of Origin (if required), and Safety Data Sheet (SDS). Additional documentation such as GMO-free statements or allergen declarations can be provided upon request.
Can you provide custom packaging or private labeling?
Yes, we offer custom packaging solutions, including private labeling and branded drums. Our logistics team can work with you to meet specific labeling requirements for different regions.
What is the typical lead time for bulk orders?
Lead times vary depending on order size and current production schedules. Generally, for orders up to 100 kg, we can ship within 2–3 weeks. Larger quantities may require 4–6 weeks. We recommend contacting us with your forecast to secure timely delivery.
Sourcing and Technical Support
In summary, sourcing high-quality 5,7-dihydro-2-methylthieno[3,4-d]pyrimidine requires a partner with deep technical expertise and a robust supply chain. From precise purity control to tailored logistics, every detail matters in maintaining the integrity of your final product. Our team is ready to support your formulation challenges with reliable material and responsive service. Ready to optimize your supply chain? Reach out to our logistics team today for comprehensive specifications and tonnage availability.