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2. U.S. government to give out free COVID-19 tests. Here's how ...

   www.aol.com/u-government-free-covid-19-214600104...

   The federal government will again provide free COVID-19 test kits to U.S. residents beginning next week. All households will be eligible to order four free tests starting Sept. 25, according to ...

3. Percent active chlorine - Wikipedia

   en.wikipedia.org/wiki/Percent_active_chlorine

   Percent active chlorine values have now virtually replaced the older system of chlorometric degrees: 1% active chlorine is equivalent to 3.16 °Cl. Taking the (reasonable) assumption that all active chlorine present in a liquid bleach is in the form of hypochlorite ions, 1% active chlorine is equivalent to 0.141 mol/kg ClO − (0.141 mol/L if ...

4. Calcium hypochlorite - Wikipedia

   en.wikipedia.org/wiki/Calcium_hypochlorite

   Calcium hypochlorite is an inorganic compound with chemical formula Ca(Cl O) 2, also written as Ca(OCl) 2.It is a white solid, although commercial samples appear yellow. It strongly smells of chlorine, owing to its slow decomposition in moist air.

5. Chlorine-releasing compounds - Wikipedia

   en.wikipedia.org/wiki/Chlorine-releasing_compounds

   Chlorine is a respiratory irritant that attacks mucous membranes and burns the skin. As little as 3.53 ppm can be detected as an odor, and 1000 ppm is likely to be fatal after a few deep breaths. Exposure to chlorine has been limited to 0.5 ppm (8-hour time-weighted average—38-hour week) by the U.S. OSHA. [9]

6. How to order free at-home COVID-19 tests from the government

   www.aol.com/news/order-free-home-covid-19...

   Americans can order free at-home COVID-19 test kits from the government. Here's everything you need to know to get free rapid tests for COVID testing at home.

7. Get four free at-⁠home COVID-⁠19 tests from the CDC - AOL

   www.aol.com/four-free-home-covid-19-143825274.html

   Every household may place an order to receive four free COVID-⁠19 rapid tests delivered directly to your home. ... Free at-home COVID-19 test kits are available from the U.S. government at www ...

8. Trichloroisocyanuric acid - Wikipedia

   en.wikipedia.org/wiki/Trichloroisocyanuric_acid

   Trichloroisocyanuric acid is an organic compound with the formula (CONCl) 3.It is used as an industrial disinfectant, bleaching agent and a reagent in organic synthesis. [1] [2] [3] This white crystalline powder, which has a strong "chlorine odour," is sometimes sold in tablet or granule form for domestic and industrial use.

9. Argentometry - Wikipedia

   en.wikipedia.org/wiki/Argentometry

   The Mohr method may be adapted to determine the total chlorine content of a sample by igniting the sample with calcium, then ferric acetate. Calcium acetate "fixes" free chlorine, precipitates carbonates, and neutralizes the resultant solution. Ferric acetate removes phosphates. All chlorides are dissolved out of the residue, and titrated. [1]