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Dirty sock odour = base stock of oil- carboxylic acids

Air Quality within Commercial Aircraft ( pdf available here)

8.1.1.Carboxylic Acids. Carboxylic acids originate predominantly from the thermal decomposition and hydrolysis of synthetic turbine oil. This decomposition occurs in airconditioning systems if oil residue and moisture are present. These acids have very low odor thresholds and can be irritating to the observer. Carboxylic acids have a smell characteristic of dirty socks. They are not specifically regulated by the FARs.

8.1.2.10 Esters. Esters are used in the base stocks of synthetic turbine oil and are combined with carboxylic acids
during the synthesis process. Thermal decomposition causes turbine oil to revert back to esters and carboxylic acids.
​

________________________

Carbolic Acid (phenol)is an extremely poisonous compound, used in dilute solution as an antimicrobial, anesthetic, and antipruritic. Ingestion or absorption through the skin causes symptoms including colic, local irritation, corrosion, seizures, cardiac arrhythmias, shock and respiratory arrest. Phenol should be properly labeled and stored to avoid accidental poisoning. 

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Unfortunately we are not able to provide personal advice to individuals on diagnosis, treatment and professionals, and/or legal matters. However, you will find all necessary information within these pages. Thank you for your understanding and we hope that the materials on this website will help answer your questions.

​Disclaimer: I am not a medical doctor but a concerned citizen collating research. The provided information should be double checked by everyone according to their personal circumstances before embarking on any treatment in consultation with their personal doctor who knows about the discussed subject and their medical history. Please make sure to present the three downloadable documents HERE  for your doctor's information. This is an effort to share what I have learnt by reading many scientific and medical journals on this subject.


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UNFILTERED formerly known as "Aerotoxic Team" the Global Network
2013 - 2025
​Latest update January 10, 2023

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About: Curriculum Vitae
  • HOME
    • SPANISH
    • Who's who?
    • Report an Incident
  • What are Fume Events?
    • Fume Events? Aerotoxic Syndrome? >
      • Aerotoxic Syndrome Advice
    • Medical INFO
    • Why ICD-Classification?
    • Science
    • Flying while pregnant
  • Unfiltered - contents of fumes
  • Evidence
    • Time Line
    • Evidence in Documentaries
    • Court Cases >
      • ICC The Hague
      • The Hague
    • Testimonies
    • FAQ's
  • CREW mask info
    • Flyer's Friend®
  • Chemicals With Wings
    • Research Articles
  • Passenger Videos
  • Filtration Expert Articles
    • Contaminated air in airliner cabins, A summary but comprehensive presentation by John M. Lind CPCU ARM
    • ASHRAE Introduction to Passenger Aircraft Cabin Air /Summary R. Schuetz
    • Aeronautical Engineering Prof. Dr.-Ing Dieter Scholz
    • Flying despite Corona? Markus Steinhausen
    • Airbus' Cabin Air Explanations during the Corona Pandemic Prof. Dr D. Scholz
    • Airborne COVID-19 Decontamination Reinhard Schuetz P. Eng.
    • Airline CEO's Obsession... Bearnairdine Beaumont
    • Filtration Efficiency Claims: Misleading? Reinhard Schuetz P. Eng.
    • HEPA Technology Tested
    • Forgotten Pollution: Cabin Air Quality Rein A. Roos PhD
  • PETITION
    • Petition en Français
    • Petition in English
    • Petition auf Deutsch
    • Petition en Español
    • Petition in het Nederlands
  • MEDICAL HEALTH CONCERNS at Altitude, Fumes & Vaccinations