Filters for respirators or cartridges are replacements that protect you from different dangers in your workplace such as particles, fumes or chemicals.
It is necessary that you use the correct one for your activities because there are them for different uses such as filters for organic vapors, for ammonia or methylamines, or for organic vapors.
To ensure that the cartridges work, the filters and cartridges must be approved by The National Occupational Safety & Health (NIOSH) is a branch of the Centers for Disease Control (CDC). Its National Personal Protection Testing Laboratory is tasked with testing and certifying (source of the "T'C" approval name) respiratory protection. Approval is based on the filtering mechanism. If you require more assistance in selecting your filters, consult with one of the advisors.
Fire Retardant Coveralls