When working with specialized chemical compounds like sodium tungstate, access to accurate and comprehensive information is paramount. The Sodium Tungstate Technical Data Sheet (TDS) serves as an indispensable resource, offering a detailed overview of its properties, characteristics, and safe handling guidelines. This document is a critical tool for ensuring proper application and safety across various industrial and laboratory settings where sodium tungstate is utilized.
What is Sodium Tungstate?
Sodium tungstate, with the chemical formula Na₂WO₄, is an inorganic compound often encountered in its dihydrate form, Na₂WO₄·2H₂O. It is a white, crystalline salt that is highly soluble in water. This versatility makes it valuable in numerous applications, from catalysis to analytical chemistry. Understanding the specific grade and form of sodium tungstate is crucial, and this information is prominently featured in its respective technical data sheet.
Key Forms of Sodium Tungstate
Sodium Tungstate Dihydrate: This is the most common form, readily available and widely used.
Anhydrous Sodium Tungstate: A less common but important form, often used in applications where water content must be strictly controlled.
The Purpose of a Sodium Tungstate Technical Data Sheet
The primary purpose of a Sodium Tungstate Technical Data Sheet is to provide a standardized, comprehensive summary of the product’s attributes. It acts as a reference for quality control, regulatory compliance, and safe operational procedures. For anyone involved in purchasing, storing, or using sodium tungstate, the TDS offers clarity and essential details.
Crucial Sections of a Sodium Tungstate Technical Data Sheet
A typical Sodium Tungstate Technical Data Sheet is structured to provide information systematically. Each section is vital for a complete understanding of the compound.
Product Identification
This section typically includes the chemical name, common synonyms, and unique identifiers.
Chemical Name: Sodium Tungstate
CAS Number: This unique identifier is critical for regulatory and chemical inventory purposes (e.g., 13472-35-0 for dihydrate, 7631-97-2 for anhydrous).
EC Number: Another important identifier for European markets.
Chemical Formula: Na₂WO₄ or Na₂WO₄·2H₂O.
Molecular Weight: The molar mass of the compound, varying slightly between anhydrous and dihydrate forms.
Physical and Chemical Properties
This section provides quantitative data on the compound’s inherent characteristics, which are fundamental for its application and handling.
Appearance: Typically described as white crystalline powder or crystals.
Purity: A critical specification, usually expressed as a percentage (e.g., ≥99.5%). This directly impacts the compound’s performance in sensitive applications.
Solubility: Details its solubility in various solvents, primarily water, often with specific values at certain temperatures.
Melting Point: The temperature at which the compound transitions from solid to liquid.
Density: The mass per unit volume, important for storage and transport calculations.
pH: The pH of a solution containing sodium tungstate at a specified concentration.
Boiling Point: While sodium tungstate decomposes before boiling, this section may note decomposition temperatures.
Specifications and Grades
Sodium tungstate is available in various grades, each suited for different applications. The Sodium Tungstate Technical Data Sheet will clearly define the grade and its corresponding specifications.
Technical Grade: Suitable for general industrial uses.
Reagent Grade: Higher purity, for laboratory applications.
Analytical Grade: Highest purity, for precise analytical work.
Specific Impurity Limits: Details on maximum allowable levels of other elements like iron, chloride, or sulfates.
Typical Applications
While not strictly technical data, many Sodium Tungstate Technical Data Sheets include a brief overview of common uses to provide context.
Catalysis: As a catalyst in organic synthesis.
Pigments: Used in the production of tungsten pigments.
Fire Retardants: Employed in textile and fabric treatments.
Water Treatment: For corrosion inhibition.
Biochemistry: In enzyme studies and as a precipitating agent.
Handling and Storage
This section outlines the best practices for maintaining product integrity and ensuring safety.
Storage Conditions: Recommends cool, dry places, often in tightly sealed containers to prevent moisture absorption.
Incompatibilities: Lists substances to avoid mixing with sodium tungstate.
Packaging: Information on standard packaging sizes and materials.
Safety Information
A critical component, often referencing or including data from the Safety Data Sheet (SDS) for sodium tungstate.
Hazard Statements: GHS classifications and related hazard statements (e.g., H302: Harmful if swallowed).
Precautionary Statements: Recommended safety measures (e.g., P264: Wash thoroughly after handling).
First Aid Measures: Instructions for exposure via skin, eyes, inhalation, or ingestion.
Personal Protective Equipment (PPE): Guidelines for gloves, eye protection, and respiratory protection.
Why Interpreting Your Sodium Tungstate Technical Data Sheet is Essential
Properly interpreting a Sodium Tungstate Technical Data Sheet allows users to make informed decisions regarding product selection, application methods, and safety protocols. It ensures that the correct grade of sodium tungstate is used for a specific purpose, preventing costly errors and potential hazards. Furthermore, adherence to the guidelines presented in the TDS helps maintain compliance with industry standards and regulations.
Conclusion
The Sodium Tungstate Technical Data Sheet is more than just a document; it’s a foundational resource for anyone engaged with this versatile compound. By thoroughly reviewing and understanding the information within, users can confidently handle, store, and apply sodium tungstate, ensuring both operational efficiency and safety. Always consult the most current Sodium Tungstate Technical Data Sheet provided by your supplier for the most accurate and up-to-date information specific to the product you are using.