Description
Specifications Table
Product Name – Whatman Grade 3621 Cellulose Filter Paper
Quantity/Pack Size – 140x200MM (Pack of 1000)
Form – Sheets
Grade – 3621
Application – General filtration, qualitative analysis
Product Overview
Whatman Grade 3621 Cellulose Filter Paper is a high-performance filtration medium designed for general laboratory applications requiring fast flow rates and high particle retention. Made from pure cellulose fibers, this filter paper ensures minimal extractables and consistent filtration performance. The medium-speed retention (11 µm) makes it ideal for routine qualitative analysis, gravimetric determinations, and clarification of liquids. Its uniform thickness and smooth surface minimize clogging, ensuring efficient filtration even with moderately fine precipitates. The paper’s chemical resistance allows compatibility with a wide range of solvents, making it versatile for diverse lab protocols. Whether used in vacuum or pressure filtration setups, Grade 3621 delivers reliable results with minimal background interference. Its high wet strength prevents tearing during handling, while the natural cellulose composition ensures biodegradability. This filter paper is a trusted choice for laboratories prioritizing precision, reproducibility, and cost-effectiveness in their filtration processes.
FAQs
1. What is the particle retention size of Whatman Grade 3621 filter paper?
The particle retention size for Whatman Grade 3621 is approximately 11 micrometers, making it suitable for medium-speed filtration.
2. Can this filter paper be used with organic solvents?
Yes, Grade 3621 is compatible with most organic solvents, including alcohols, ketones, and hydrocarbons, due to its cellulose composition.
3. How should this filter paper be stored to maintain its quality?
Store the filter paper in a cool, dry place away from direct sunlight and chemical vapors to prevent degradation or contamination.
4. Is this filter paper suitable for gravimetric analysis?
Yes, its low ash content (less than 0.06%) and consistent weight make it ideal for gravimetric determinations where precision is critical.
5. What alternatives are available if I need a faster flow rate?
For faster flow rates, consider Whatman Grade 1 or Grade 4 filter papers, which offer higher porosity while maintaining good particle retention.
