Fisherbrand* Quantitative Grade Filter Paper Circles Manufactured to reduce silicon dioxide, calcium oxide and ferric oxide levels
- Made from high-quality alpha cotton cellulose, washed in hydrochloric acid and neutralized in an ultrapure water rinse
- Leave no more than 0.01% ash when burned
- Limited wet strength, subtable for gravity or low-suction filtration; should be used with care to avoid rupturing.
All papers listed in chart meet ASTM* requirements for “ash content per circle.”