- WHA1444090
WHA1444090
Whatman® quantitative filter paper, ashless, Grade 44
circles, diam. 90 mm, pack of 100
Recommended Products
material
circles
cotton filters (high-quality cotton linters)
embalagem
pack of 100
manufacturer/tradename
Whatman 1444-090
Whatman Article No. 28418064 (US reference)
parâmetro
0.29 psi wet burst
995 sec/100 mL speed (Herzberg)
diâmetro
90 mm
espessura
180 μm
cinzas
≤0.007%
tamanho de poro
3 μm (Particle retention)
peso base
80 g/m2
Looking for similar products? Visit Product Comparison Guide
Related Categories
Compare Similar Items
View Full Comparison1 of 4
This Item | WHA1444110 | WHA1444150 | WHA1444070 |
|---|---|---|---|
| material circles , cotton filters (high-quality cotton linters) | material circles , cotton filters (high-quality cotton linters) | material circles , cotton filters (high-quality cotton linters) | material circles , cotton filters (high-quality cotton linters) |
| packaging pack of 100 | packaging pack of 100 | packaging pack of 100 | packaging pack of 100 |
| manufacturer/tradename Whatman 1444-090, Whatman Article No. 28418064 (US reference) | manufacturer/tradename Cytiva, Whatman 1444-110, Whatman Article No. 28418065 (US reference) | manufacturer/tradename Whatman 1444-150, Whatman Article No. 28418067 (US reference) | manufacturer/tradename Whatman 1444-070, Whatman Article No. 28418063 (US reference) |
| parameter 0.29 psi wet burst, 995 sec/100 mL speed (Herzberg) | parameter 0.29 psi wet burst, 995 sec/100 mL speed (Herzberg) | parameter 0.29 psi wet burst, 995 sec/100 mL speed (Herzberg) | parameter 0.29 psi wet burst, 995 sec/100 mL speed (Herzberg) |
| diam. 90 mm | diam. 110 mm | diam. 150 mm | diam. 70 mm |
| pore size 3 μm (Particle retention) | pore size 3 μm (Particle retention) | pore size 3 μm (Particle retention) | pore size 3 μm (Particle retention) |
Descrição geral
Ashless: 0.007% ash maximum for Grades 40 to 44 and a maximum of 0.01% for the 589 Grades - very pure filters suitable for a wide range of critical analytical filtration procedures.
Hardened low ash: 0.015% ash maximum - treated with a strong acid to remove trace metals and produce high wet strength and chemical resistance. These filters are particularly suitable for Büchner filtration where the tough smooth surface of the filter makes it easy to recover precipitates.
Hardened ashless: 0.006% ash maximum - acid hardened to give high wet strength and chemical resistance with extremely low ash content. The tough surface makes these filters suitable for a wide range of critical filtration procedures.
Grade 44: 3 μm (slow to medium filter paper)
Thin version of Grade 42 retaining very fine particles but with lower ash weight per sample and almost twice the flow rate of Grade 42.
Outras notas
Informações legais
Certificates of Analysis (COA)
Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.
Already Own This Product?
Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.
Difficulty Finding Your Product Or Lot/Batch Number?
How to Find the Product Number
Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).
Example:
Additional examples:
705578-5MG-PW
PL860-CGA/SHF-1EA
MMYOMAG-74K-13
1000309185
(enter as 1.000309185)
Having trouble? Feel free to contact Technical Service for assistance.
How to Find a Lot/Batch Number for COA
Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.
Aldrich Products
For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').
For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').
For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.
Not Finding What You Are Looking For?
In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.
Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.
Contact Technical Service