For B2B buyers in the pharmaceutical, cosmetic, and fine chemical industries, procuring raw materials like Sodium Hydroxymethylglycinate (CAS 70161-44-3) requires a precise checklist to ensure the quality and reliability of their supply. As a leading manufacturer and supplier, we’ve outlined the critical specifications that procurement managers and R&D scientists should always verify to secure the best possible product and value.

1. Assay Purity: This is often the most critical factor. For pharmaceutical intermediates and high-performance applications, look for a guaranteed assay of ≥99%. Suppliers should clearly state this figure and be prepared to provide documentation supporting it. The purity directly impacts the efficacy and safety of the final product.

2. Chemical Name and CAS Number: Always confirm the exact chemical name (Sodium Hydroxymethylglycinate) and the correct CAS number (70161-44-3). This ensures you are sourcing the precise compound needed for your processes. Note that synonyms like Glycine, N-(hydroxymethyl)-, sodium salt (1:1) are also used.

3. Appearance: While the primary form is a white powder, verifying this against the supplier's specifications is good practice. Consistency in appearance often reflects consistent manufacturing quality.

4. Certifications: For pharmaceutical applications, GMP and SGS certifications are highly desirable. Compliance with international standards such as USP, BP, EP, and FCC demonstrates that the product has undergone rigorous testing and meets global quality benchmarks.

5. Manufacturer Reputation and Location: Partnering with a reputable manufacturer, particularly one based in China with established export capabilities, can offer significant advantages in terms of both pricing and supply volume. Research the supplier’s history and their customer service responsiveness.

6. Packaging and Lead Times: Ensure the packaging (e.g., 20kg/drum) is suitable for your storage and handling needs. Confirm the manufacturer's lead times for production and delivery to ensure your supply chain remains uninterrupted. Understanding the MOQs is also essential for planning purchases.

By adhering to this checklist when you seek to purchase Sodium Hydroxymethylglycinate, you can confidently select a supplier that meets your stringent quality requirements and provides excellent value. Prioritizing these specifications will lead to more reliable sourcing of this vital chemical intermediate.