For professionals in chemical procurement, acquiring specialized compounds like New Indocyanine Green (CAS: 172616-80-7) demands a meticulous approach. Ensuring you buy a high-grade product that meets stringent specifications is crucial for downstream applications, whether in research or manufacturing. This checklist outlines key considerations for purchasing this advanced dye.

1. Verify Chemical Identity and Specifications:
The absolute first step is to confirm the product's identity. Always cross-reference the CAS number (172616-80-7) with the supplier's information. Next, scrutinize the assay or purity level. For New Indocyanine Green, a minimum of 95% purity is often preferred for demanding applications. Also, confirm the appearance (e.g., dark green cyan or dark brown powder) matches expected standards. Understanding the molecular formula (C46H50ClN2NaO6S2) and molecular weight (849.47) aids in verifying product authenticity.

2. Assess Supplier Reliability and Origin:
When you decide to buy, the supplier's reputation is paramount. Look for manufacturers with a proven track record, especially those specializing in dyes and fine chemicals. Sourcing from established manufacturers in regions like China can offer competitive pricing and direct access to production. Inquire about their manufacturing processes and quality control measures. A reliable supplier will readily provide Certificates of Analysis (CoA) for each batch.

3. Evaluate Capacity and Packaging Options:
Consider your required volume. Does the manufacturer offer custom capacities to suit your specific project needs, from R&D quantities to bulk industrial supply? Also, assess the packaging. Is it appropriate for safe transport and storage of a fine chemical powder? Secure and appropriate packaging is essential to maintain product integrity and safety.

4. Request Samples and Quotes:
Before committing to a large purchase, always request a sample. This allows your R&D team or quality control department to perform necessary tests and ensure the material meets your exact requirements. Simultaneously, obtain a detailed quote that includes pricing per unit, potential bulk discounts, and any applicable minimum order quantities (MOQs). Understanding the price structure is key for budget management.

5. Understand Lead Times and Delivery:
Inquire about the typical lead times for your desired quantity. This is especially important for time-sensitive projects. Confirm shipping arrangements and costs, and understand the expected delivery timeline. For international purchases, clarify customs procedures and any import duties that may apply.

By systematically addressing these points, procurement professionals can confidently buy high-grade New Indocyanine Green, ensuring the quality and efficiency of their operations. Partnering with a reputable manufacturer who prioritizes these details is the foundation of successful chemical sourcing.