Whatman Laboratory Filters

• Application
• Gravimetric analysis, sulfate determination, metal analysis

• Capacity
• Low ash maximum ash content 0.007% Pcs/hr

• Diameter
• Whatman No. 42 available in various diameters (commonly 42.5 mm, 70 mm, 90 mm, 110 mm, 125 mm, 150 mm, 185 mm, and 240 mm) Millimeter (mm)

• Efficiency (%)
• High (precise quantitative analysis)

• Material
• Other

• Resistance
• Excellent wet strength and chemical resistance

• Thermal Shrinkage
• Negligible under normal use

• Thickness
• 190 m Meter

• Type
• Filter Felt

• Working Temperature
• Up to 120 C Rankine

• Application
• Qualitative analysis and general laboratory filtration

• Capacity
• Not specified for flat Grade 4; high-flow qualitative filter Pcs/hr

• Color
• White

• Diameter
• 125 mm Millimeter (mm)

• Efficiency (%)
• Approx. 98% at 25 m particle retention

• Height
• 205 210 m Meter (m)

• Length
• 110 mm Millimeter (mm)

• Material
• Other

• Product Type
• Laboratory Filter Paper

• Resistance
• Wet burst: approx. 0.22 psi

• Size
• 100 circles/pack

• Thermal Shrinkage
• Not specified by manufacturer

• Thickness
• ~215 220 m Meter

• Type
• Filter Felt

• Usage
• Filtration of coarse particles and gelatinous precipitates

• Weight
• 92 g/m (basis weight) Grams (g)

• Width
• 110 mm Millimeter (mm)

• Working Temperature
• Not specified by manufacturer Rankine

• Application
• General laboratory filtration, qualitative analysis, routine separation, and clarity testing

• Capacity
• Medium retentive capacity Kg

• Color
• WHITE

• Diameter
• 125 mm Millimeter (mm)

• Efficiency (%)
• Up to 98%

• Height
• 0.18 mm Millimeter (mm)

• Length
• 125 mm Millimeter (mm)

• Material
• Other

• Product Type
• Laboratory Filtration

• Resistance
• Good chemical resistance to most acids and alkalis

• Size
• 125 mm Diameter

• Thermal Shrinkage
• <1% at high temperatures

• Thickness
• 180 m (microns) Meter

• Type
• Filter Felt

• Usage
• Laboratory Filtration

• Weight
• 87 g/m GSM (gm/2)

• Width
• 125 mm Millimeter (mm)

• Working Temperature
• Up to 120C Rankine

• Application
• Ideal for analytical procedures such as gravimetric analysis; filtration of gelatinous precipitates

• Capacity
• High flux, moderate dirt-holding capacity Kg

• Color
• White

• Diameter
• 110 mm (available in various sizes) Millimeter (mm)

• Efficiency (%)
• Fast filtration (low retention of fine precipitates)

• Height
• Approx. 0.22 mm (Thickness) Millimeter (mm)

• Length
• Same as Width (Circular Filter Paper Diameter) Millimeter (mm)

• Material
• Other

• Product Type
• Filter Paper

• Resistance
• Good resistance to most acids (not HF) and alkalis

• Size
• 90 mm (Most Common Size) / Multiple Sizes Available

• Thermal Shrinkage
• <0.1% at 120C for 30 minutes

• Thickness
• 205 m Meter

• Type
• Black Wire Cloth

• Usage
• Laboratory Filtration

• Weight
• 85 g/m GSM (gm/2)

• Width
• Available in 42.5 mm, 55 mm, 70 mm, 90 mm, 110 mm, 125 mm, 150 mm, 185 mm, 240 mm Millimeter (mm)

• Working Temperature
• Up to 120C Fahrenheit (oF)

• Application
• Laboratory

• Capacity
• Medium loading/filtration capacity; manufacturer does not specify a numerical capacity Kg

• Color
• White

• Diameter
• 125 mm Millimeter (mm)

• Efficiency (%)
• 98% particle retention rating at the specified retention size

• Height
• 210 m (0.21 mm) Millimeter (mm)

• Length
• Depends on selected size; for circular filters, length is represented by diameter Millimeter (mm)

• Material
• Other

• Product Type
• Quantitative Filter Paper

• Resistance
• Wet burst strength approximately 0.29 psi (2.0 kPa)

• Size
• Various sizes; e.g. 47 mm diameter 100 pcs/pack

• Thermal Shrinkage
• Not specified by manufacturer

• Thickness
• 210 m Micrometers (um)

• Type
• Non-Woven Filter

• Usage
• Quantitative filtration, gravimetric analysis, soil analysis, cement/clay/metal analysis, sample preparation for AA spectrometry

• Weight
• 95 g/m Grams (g)

• Width
• Depends on size; common circular diameter 47 mm, 70 mm, 90 mm, 110 mm, 125 mm, 150 mm, 185 mm Millimeter (mm)

• Working Temperature
• Suitable for normal laboratory filtration; do not list a maximum temperature as a certified specification unless confirmed from the particular product SDS/data sheet Rankine

• Appearance
• White crystalline solid (anhydrous); forms hydrates

• Application
• Laboratory

• CAS No
• 7601-89-0

• Capacity
• High particle loading capacity Pcs/hr

• Chemical Name
• Other

• Classification
• Other

• Color
• White

• Diameter
• 24 mm Millimeter (mm)

• Efficiency (%)
• 99.7%

• Grade
• ACS Grade

• HS Code
• 2829.90.10

• Material
• Other

• Melting Point
• 468 C (lit.)

• Molecular Formula
• NaClO4

• Molecular Weight
• 122.44

• Other Names
• Perchloric acid sodium salt

• Ph Level
• 6.0-8.0 (25 C, 5%)

• Physical Form
• Other

• Purity(%)
• >99.9

• Resistance
• Chemically resistant to most solvents, strong acids (except hydrofluoric acid) and bases

• Shelf Life
• 12 Months

• Storage
• Store in tightly closed container, avoid moisture

• Structural Formula
• NaClO4

• Thermal Shrinkage
• Minimal, typically <1.5% at 550C

• Thickness
• 0.43 mm (typical for Whatman GF/C series) Meter

• Type
• Strong oxidizer; hygroscopic

• Usage
• Laboratory reagent

• Working Temperature
• Up to 550C Rankine

• Application
• Laboratory filtration, sample preparation, covering applications

• Capacity
• 500 pieces per pack Pcs/hr

• Color
• White

• Diameter
• 100 x 100 mm Millimeter (mm)

• Efficiency (%)
• Approx. 98% at 25 m particle retention

• Height
• 205 210 m Meter (m)

• Length
• 110 mm Millimeter (mm)

• Material
• Other

• Product Type
• Laboratory Filter Paper

• Resistance
• Wet burst: approx. 0.22 psi

• Size
• 12

• Thermal Shrinkage
• Not specified by manufacturer

• Thickness
• Not specified for flat Grade 4; high-flow qualitative filter Meter

• Type
• Filter Felt

• Usage
• Filtration of coarse particles and gelatinous precipitates

• Weight
• 92 g/m (basis weight) Grams (g)

• Width
• 110 mm Millimeter (mm)

• Working Temperature
• Not specified by manufacturer Rankine

• Application
• Soxhlet extraction, EPA methods, pesticide & pollutant analysis

• Capacity
• Not specified Pcs/hr

• Color
• White

• Diameter
• 25 mm (as per visible packaging, catalog number 2800-025) Millimeter (mm)

• Efficiency (%)
• High extraction efficiency

• Height
• 90 mm Millimeter (mm)

• Length
• 90 mm Millimeter (mm)

• Material
• Other

• Product Type
• High-Purity Glass Microfiber Extraction Thimble

• Resistance
• High chemical and thermal resistance

• Size
• 25 90 mm

• Thermal Shrinkage
• <2% at 500C

• Thickness
• Wall thickness approximately 1.5 mm Meter

• Type
• Filter Felt

• Usage
• Laboratory extraction and analytical testing

• Weight
• Approx. 500 g per pack (TradeIndia listing value; pack weight) Grams (g)

• Width
• 25 mm Millimeter (mm)

• Working Temperature
• Up to 500C Rankine