General Information
- Product Name: Phosphotungstic Acid Hydrate
- Molecular Formula: H3PW12O40•xH2O
- Molecular Weight: 2880.2 g/mol (anhydrous)
- CAS Number: 1343-93-7

Physical and Chemical Characteristics
- Appearance: Yellowish-white crystalline powder
- Solubility: Soluble in water and ethanol
- Melting Point: Decomposes at 200-300°C
- Density: 4.0-4.5 g/cm³
- pH Value: 1.5-2.5 (1% aqueous solution)

Specifications
- Assay: ≥99.0%
- Moisture: ≤20.0%
- Heavy Metals: ≤10 ppm
- Residue on Ignition: ≤0.1%
- Microbial Limit: ≤100 CFU/g

Stability and Storage
- Stability: Stable for at least 2 years from the date of manufacture when stored properly
- Storage: Store in a cool, dry place, away from direct sunlight and moisture

Handling and Safety
- Handling: Handle with care, as the product may be irritating to skin and eyes
- Safety: Wear protective gloves, safety glasses, and a dust mask when handling the product
- Disposal: Dispose of the product according to local regulations and guidelines

Regulatory Compliance
- ACS: Compliant with American Chemical Society (ACS) standards
- ISO: Compliant with International Organization for Standardization (ISO) standards

Packaging
- Packaging Size: 25g
- Packaging Material: Airtight containers or bags
- Labeling: Product name, molecular formula, molecular weight, CAS number, and batch number

Applications
- Catalysis: Used as a catalyst in various chemical reactions, including polymerization and oxidation reactions
- Analytical Chemistry: Used as a reagent in analytical chemistry applications, including spectrophotometry and chromatography
- Research and Development: Used in research applications, including the development of new materials and technologies.

This specification sheet provides detailed information about Phosphotungstic Acid Hydrate's properties, specifications, and applications, ensuring that customers can make informed decisions about its use.