For anyone looking to buy 3-Bromo-1,2-propanediol (CAS 4704-77-2), understanding its key specifications is crucial for ensuring it meets the demands of your specific application, whether it's for pharmaceutical synthesis, biochemical research, or other fine chemical processes. As a critical building block, the quality and precise characteristics of this compound can significantly influence the success of your projects. This guide aims to demystify the essential specifications for R&D scientists and procurement professionals.

The primary identifier for any chemical compound is its CAS Registry Number. For 3-Bromo-1,2-propanediol, this is 4704-77-2. This unique identifier ensures that you are purchasing the correct substance and helps avoid confusion with similar compounds. When you inquire about a product, always confirm the CAS number to guarantee accuracy. Alongside the CAS number, the Molecular Formula (C3H7BrO2) and Molecular Weight (154.99) are fundamental pieces of information that define the chemical's composition.

The physical appearance is a vital, albeit basic, characteristic. 3-Bromo-1,2-propanediol is typically described as a viscous liquid, with a color ranging from clear colorless to yellow. While variations in color might occur due to minor impurities or handling, a significant deviation could indicate a quality issue. Other physical properties commonly listed by manufacturers and suppliers include:

  • Boiling Point: Approximately 72-75 °C at 0.2 mm Hg. This indicates its volatility and is important for distillation or reaction conditions.
  • Density: Around 1.771 g/mL at 25 °C. Density is a key physical constant for calculations involving volume and mass.
  • Refractive Index: n20/D 1.518. This property is often used for quality control and identification.
  • Flash Point: >230 °F. This indicates its flammability characteristics and is crucial for safety handling.
  • Storage Temperature: Typically recommended to be stored at 2-8°C. Proper storage ensures the compound's stability and longevity.

Purity is perhaps the most critical specification for R&D and pharmaceutical applications. Suppliers will usually state the purity percentage, often determined by Gas Chromatography (GC). Common purity levels include 95%, 97%, or even higher for specialized applications. When you intend to purchase 3-Bromo-1,2-propanediol, always clarify the minimum purity level and the analytical method used to determine it. Understanding the impurity profile, if available, can also be beneficial for highly sensitive syntheses.

When sourcing from a supplier in China or any other region, always look for comprehensive documentation. This includes a Certificate of Analysis (CoA) which details the specific test results for the batch you are purchasing, and a Safety Data Sheet (SDS) which provides critical information on safe handling, storage, and emergency procedures. For procurement managers, ensuring the manufacturer provides these documents instills confidence in the product's quality and safety.

In summary, when you decide to buy 3-Bromo-1,2-propanediol, pay close attention to the CAS number, molecular formula, physical characteristics, purity levels, and the supporting documentation provided by the supplier. By thoroughly evaluating these specifications, you can ensure you are obtaining a high-quality product that perfectly suits your scientific or industrial needs.