PFOS

PFOS (Perfluorooctane Sulfonate) is a synthetic chemical used to make products resistant to stains, grease, soil and water. Read more about PFOS, Latest News PFOS, Health Effects, Use, Latest News

What is PFOS
Table of Contents☰

PFOS Latest News

PFOS, a widespread industrial ‘forever chemical’, weakens the body’s ability to fight viral infections, a study has found recently.

About PFOS

  • PFOS (Perfluorooctane Sulfonate or Perfluorooctane Sulfonic Acid) is a synthetic chemical used to make products resistant to stains, grease, soil, and water. 
  • It is an organic perfluorinated compound, consisting of an eight-carbon backbone and a sulfonate functional group. 
  • It is part of a class of chemicals called per- and polyfluoroalkyl substances (PFASs).
    • PFAS, also known as the Forever Chemicals, are a large chemical family of over 10,000 highly persistent chemicals that don’t occur in nature.
  • PFOS is very stable in the environment and hard to break down. PFOS also moves easily through groundwater. 
  • PFOS is of particular concern because it can accumulate up the food chain in aquatic systems and can lead to high concentrations in predatory fish consumed by anglers.
  • It can cause serious health effects, including cancer, endocrine disruption, accelerated puberty, liver and immune system damage, and thyroid changes.    
  • When and how has PFOS been used?
    • Starting in the 1940s, PFOS was used in many consumer and industrial products, including carpets, rugs, upholstered furniture, non-stick cookware, and leather products.  
    • PFOS has also been present in some firefighting foams used at airports, firefighter training facilities, and military airfields.
  • PFOS is listed under the Stockholm Convention on Persistent Organic Pollutants (POPs), subject to international restrictions and exemptions.

News: TH

Update Icon
Latest UPSC Exam 2026 Updates

Date IconLast updated on Sep, 2026

→ UPSC 2027 Notification will be released on 13 January 2027 at upsconline.nic.in.

→ Asian Games 2026 are being held in Aichi-Nagoya, Japan, from 19 September to 4 October.

→ Check out the latest UPSC Syllabus here.

→ Download UPSC Model Answers for Mains 2026

→ UPSC Mains Question Paper 2026 is out now for Essay & GS Paper 1, 2, 3 & 4.

→ UPSC Calendar 2027 has been released.

→ Enroll in Vajiram & Ravi’s UPSC Mains Test Series 2027 for structured answer writing practice, expert evaluation, and exam-oriented feedback.

→ Join Vajiram & Ravi’s UPSC Mentorship Program 2027 for personalized guidance, strategy planning, and one-to-one support from experienced mentors.

→ Go through the UPSC Mains Previous Year Papers to enhance your preparation.

→ UPSC has released UPSC Toppers List 2025 with the Civil Services final result on its official website.

→ Also check Best UPSC Coaching in India

PFOS FAQs

Q1. What is PFOS?+

Q2. What type of chemical compound is PFOS?+

Q3. What is the basic molecular structure of PFOS?+

Q4. Which class of chemicals does PFOS belong to?+

Q5. Why is PFOS considered environmentally persistent?+

Tags: pfos prelims pointers upsc current affairs upsc prelims current affairs

Vajiram Prelims Team
At Vajiram & Ravi, our team includes subject experts who have appeared for the UPSC Mains and the Interview stage. With their deep understanding of the exam, they create content that is clear, to the point, reliable, and helpful for aspirants.Their aim is to make even difficult topics easy to understand and directly useful for your UPSC preparation—whether it’s for Current Affairs, General Studies, or Optional subjects. Every note, article, or test is designed to save your time and boost your performance.
UPSC GS Course 2027
UPSC GS Course 2027
₹1,80,000
Enroll Now
GS Foundation Course 2 Yrs
GS Foundation Course 2 Yrs
₹2,45,000
Enroll Now
UPSC Mentorship Program
UPSC Mentorship Program
₹65000
Enroll Now
UPSC Sureshot Mains Test Series
UPSC Sureshot Mains Test Series
₹27000
Enroll Now
Prelims Powerup Test Series
Prelims Powerup Test Series
₹14000
Enroll Now
Enquire Now