For many years, a class of non-bleach liquid sporicidal disinfectants, also known as cold sterilants, have been used in biological research and pharmaceutical production to control microbial contamination. These are made up of a stabilized mixture of peracetic acid (PAA), hydrogen peroxide and acetic acid. Spor-Klenz®, manufactured by STERIS Life Sciences, is a popular example. Sampling and analysis of PAA is a challenge because it coexists with acetic acid and hydrogen peroxide and PAA’s chemical properties are similar to the two chemicals. Although ACGIH has established a TLV® for PAA, neither NIOSH nor OSHA have a sampling or analytical method for it. Additionally, PAA and acetic acid have STELs which require short-term monitoring.
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Mark Liffers is Practice Director of EHS Consulting at Triumvirate Environmental, where he provides on-site technical support and outsourced program management to a wide range of technology-based research, manufacturing and construction clients. Areas of technical expertise include: Biosafety, Industrial Hygiene, Occupational Health and Safety, Radiation Safety, Construction Safety, Risk Assessment, EHS Auditing and Emergency Management. Mark has a Master of Science degree in Industrial Hygiene from the Harvard School of Public Health.