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Description
Grade 541 Quantitative Filter Paper - 22µm, Fast Flow RateGrade 541 Quantitative Hardened Ashless Filter Paper 22m, Fast Flow Rate 100 Circles Grade 541 is the supreme quantitative filter paper, featuring high wet strength and chemical resistance. These papers are acid hardened, which reduces ash to an extremely low level. Their tough surfaces make them suitable for a wide range of critical analytical filtration operations. Each grade offers a convenient combination of filtration speed and particle
Grade 541 Quantitative Hardened Ashless Filter Paper - 22µm, Fast Flow Rate - 100 Circles
Grade 541 is the supreme quantitative filter paper, featuring high wet strength and chemical resistance. These papers are acid hardened, which reduces ash to an extremely low level. Their tough surfaces make them suitable for a wide range of critical analytical filtration operations. Each grade offers a convenient combination of filtration speed and particle retention.
Fast filtration of coarse particles and gelatinous precipitates in acid/alkali solutions during gravimetric analysis. Typical applications include fiber in animal foodstuffs, gelatine in milk and cream, chloride in cement, and chloride and phosphorous in coal and coke.
- Grade: 541
- Particle Retention: 22µm
- Flow Rate: Fast
- Filtration speed herzberg (s): 34
- Typical Thickness: 155µm
- Basis Weight (g/m2): 82
- Ash Content: 0.006%
- Units: 100 Circles
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 4
Great toy but never received the replacement they offer.
It’s is a very durable toy. But not indestructible. My dog loves the ball and it did last 4 months which is much longer than any of his other toys. I emailed the company to see if they honored their one time replacement policy for Amazon orders. I was told they do and was told I was shipped a replacement. But we never received it. We’ve ordered plenty from Amazon before and after this so I don’t know where the hold up would of happened but here we are. I did email the company back and told them that I didn’t receive the replacement and asked if they could verify my address….but they haven’t responded. Just sucks. Would of been great if I actually got the replacement!
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Reviewed in the United States on May 13, 2025
★★★★★ 5
My HEAVY chewers favorite ball
It's dense and has some weight to it, can definitely get good distance when throwing and it bounces a long way. It's soft enough for my dog to chew on but tough enough that even with her destroying every toy I get her she looses these before ever tearing into them. About softball size.
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Reviewed in the United States on April 3, 2026
★★★★★ 5
Safe
I normally don't write reviews but these products deserve the effort! I bought 4 different black toys from this Brand and all are still intact after 6 months heavy usage by 2 aggressive chewers (a Belg Malinois & black Lab), fantastic products and unlike so many other brands promising to be indestructible, these are the first toys that were not eaten within a month. No more visits to Vet to pay for Xrays after digesting plastic or rubber from badly made toys. Highly recommended.
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Reviewed in the United States on April 5, 2026
★★★★★ 3
NOT INDESTRUCTIBLE
NOT INDESTRUCTIBLE
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Reviewed in the United States on May 3, 2026
★★★★★ 5
Very sustainable, cute and fun
My puppy enjoyed this toy! He goes around the house squeaking it and has not destroyed it yet.
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Reviewed in the United States on April 30, 2026