Assertion: bleach's chemical | /r/HasProperty | eliminated by reaction
Facets:
Source sentences:
text: Introduced in 1951; used in concentrations of less than 2%; fumehood is mandatory; respirators are advised; minimize potential for explosion by keeping temperature below 25°C (77°F); hypochlorite/oxalic acid activation method requires special chamber and knowledge of handling methods; formaldehyde method safest (although formaldehyde is a carcinogen) and has minimal requirements for equipment; alkalinity may impede bleaching and so prior deacidification is not recommended (initial pH of 6 to 7 drops over the 15–20 minute time period after activation to approximately pH 5 to 6); washing is required after gas phase treatments as well as after immersion treatments; anti-chlors are used in cases where there is any doubt that all chlorine is removed from paper by washing; recommended that washing be performed in a fumehood; after treatment is complete, active chemicals in bath must be eliminated by reaction with reducing agent such as sodium thiosulphate.