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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
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4.5 ★★★★★
Based on 8 reviews
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Product Reviews
★★★★★ 5
Oily skin
Size: 2.5 Fl Oz (Pack of 1)
My skin is oily so sometimes I try different sunscreen and my skin doesn’t approve . This one is my favorite ever
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Reviewed in the United States on May 3, 2026
★★★★★ 5
Highly recommended!
I ’ve been using the Age Defense Face Sunscreen Lotion for a while now, and it has quickly become a staple in my skincare routine. The formula is lightweight, non-greasy, and absorbs quickly without leaving a white cast, making it perfect for everyday use. It provides broad-spectrum protection, shielding my skin from both UVA and UVB rays while also containing anti-aging ingredients that help keep my skin looking youthful and hydrated.
One of the standout features is its moisturizing effect—it doesn’t dry out my skin or clog pores, making it suitable even for sensitive skin. I also appreciate that it layers well under makeup without pilling. The added antioxidants are a bonus, offering extra protection against environmental stressors.
The only minor downside is that it has a slight scent, which might not be ideal for those who prefer fragrance-free products. However, the scent fades quickly and isn’t overpowering.
Overall, this sunscreen is a great choice for anyone looking for reliable sun protection with added skincare benefits. It’s effective, comfortable to wear, and leaves the skin feeling soft and smooth.
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Reviewed in the United States on March 1, 2025
★★★★★ 5
Protective
I love the protection and hydration is gives to my skin. Perfect for skin of color.
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Reviewed in the United States on February 16, 2026
★★★★★ 5
Protector solar
Este protector solar es muy bueno lo volveré a comprar
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Reviewed in the United States on May 13, 2026
★★★★★ 4
Effective for Need
I absolutely love the body sunscreen and the face sunscreen give me a glassy look after application. Only gripe is the face sunscreen irritates my eyes.
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Reviewed in the United States on June 1, 2025