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◉ Introduction to PFOS
PFOS stands for the English abbreviation of perfluorooctane sulphonate, which consists of fully fluorinated anions in perfluorinated acidic sulfuric acid. The term Perfluorinated is often used to describe a substance in which all the hydrogen ions in the carbon atoms have been converted to fluorine. PFOS has become synonymous with various types of derivatives of perfluorooctane sulphonic acid and polymers containing these derivatives. When PFOS is discovered by the outside world, it exists in the form of degraded PFOS. Those substances that can be decomposed into PFOS are called PFOS-related substances. In the CAS registry, there are 96 different fluorinated organic compounds that can release PFOS through degradation in the environment, and these substances are called PFOS-related substances.
According to reports, PFOS is one of the most difficult to degrade organic pollutants. It has hydrophobic and oleophobic properties and is widely used. PFOS can be taken up by organisms through breathing and eating, most of which are bound to plasma proteins in the blood, and the rest are accumulated in the liver tissue and muscle tissue of animals. Animal experiments have shown that 2 mg of PFOS per kilogram of animal body weight can lead to death.
◉ PFOS Application
PFOS-related chemicals are used in different products and mainly include three application areas:
(1) PFOS-related chemicals used for surface treatment can guarantee anti-fouling, oil-proof and waterproof of personal clothes, home decoration, and automobile interior.
(2) PFOS-related chemicals for paper protection, as part of slurry forming, to ensure oil and water repellency of paper and cardboard.
(3) PFOS-related chemicals in the category of performance chemicals are widely used in specialized industrial, commercial and consumer fields. This category includes various PFOS salts that are commercialized as final products.
Other history of use of PFOS, its salts and their precursors such as mosquito repellent water, oil, soil and grease for carpets, fabrics and upholstery and food packaging, surfactants in specialized applications such as firefighting foams, aviation hydraulic fluids , Fume suppression metal plating.
◉ Items that may Contain PFOS in Electronics Manufacturing
Liquids such as: detergent, cleaning liquid, etching liquid, various treatment agents, insulating oil
Coatings and sprays such as: PC steel plates, powder spraying, pigments, dyes
Inks and prints such as electrodes, resistors
Surface treatment agent and surface treatment such as: electroplating products, electroplating materials, anti-reflection materials, protective films
Molded products and molding materials such as printed circuit boards, ceramic boards, resins, sliding materials, gaskets
Solder related such as: flux, solder paste
Auxiliary materials for processes such as: grease, profiled material, sealing material, lubricating oil, adhesive
◉ PFOS Harm:
PFOS and its derivatives are difficult to be excreted by organisms through respiratory inhalation, drinking water, food intake, etc., and are especially enriched in the blood, liver, kidney, and brain of the human body, organisms. PFOS has liver toxicity and affects fat metabolism; it reduces the number of sperm in experimental animals and increases the number of deformed sperm; it causes the increase of peroxidation products in multiple organs of the body, causing oxidative damage, and directly or indirectly damaging genetic material. PFOS disrupts the balance of excitatory and inhibitory amino acid levels in the central nervous system, making animals more excitable and irritable; delaying growth and development in young animals, affecting the establishment of memory and conditioned reflex arcs; reducing serum thyroid hormone levels. A large number of investigations and studies have found that PFOS has multiple toxicities such as genotoxicity, male reproductive toxicity, neurotoxicity, developmental toxicity and endocrine disrupting effects, and is considered to be a class of environmental pollutants with systemic multi-organ toxicity.
(1) Persistence
(2) Bioaccumulation
(3) Toxicity
(4) The ability of long-distance environmental migration
◉ Restriction Directive
On December 27, 2006, the European Parliament and the Council of Ministers jointly issued the Directive on Restriction of the Sale and Use of PFOS (2006/122/EC). On October 30, 2006, the European Parliament approved the draft by 632 votes to 10. On December 12, 2006, the draft Directive was finally approved by the Council of Ministers. On December 27, 2006, the Directive was officially announced and took effect at the same time.
The EU will severely restrict the use of perfluorooctane sulfonic acid (PFOS), the European Parliament voted collectively to approve the final amendments to the EU Hazardous Substances Directive (76/769/EEC) after it was included in the new chemicals regulation (REACH) held before. Member States will have 18 months to translate the directive into their own statutes (ie until June 27, 2008). In December 2002, the 34th Joint Session of the Chemical Committee convened by the OECD defined PFOS as a substance that persists in the environment, has biological savings and is harmful to humans. The REACH regulation states that PFOS is the main chemical that requires approval before use because it is a well-known persistent organic pollutant.
◉ Limit Requirements
2006/122/EC stipulates that if PFOS is used as an ingredient in formulations, its concentration or mass equal to or more than 0.005% shall not be sold; for textiles or other coating materials, if the amount of PFOS in the coating material is equal to or more than 1μg/m2 , sales are prohibited. If the concentration or mass of PFOS is equal to or exceeding 0.1% in semi-finished products, semi-finished products and components are also included in the scope of prohibition; the scope of the directive includes all products with intentionally added PFOS, including those used in specific parts and products. Layered surfaces, such as textiles. However, the restrictions are only for new products, not for products that are already in use and on the second-hand market.
◉ Exemption Scope
(1) Photoresist or anti-reflection coating for photolithography process;
(2) Photographic coatings for film, photographic paper or printing plates;
(3) Antifogging agents for non-decorative hexavalent chromium coatings, or wetting agents for controlled electroplating systems;
(4) Hydraulic fluid
◉ Compliance Services
As a professional third-party testing and certification service organization, Jiayu Testing has qualifications such as CMA, CNAS, CBTL, CPSC, etc. It has also obtained laboratory accreditation from multiple authoritative certification agencies at home and abroad. The laboratory is strictly built and managed according to standards, equipped with advanced instruments and equipment, and has a skilled professional technical team with rich industry service experience and strong testing technology capabilities. It is proficient in various regulatory standards. Jiayu Testing provides perfluorooctane sulfonate PFOS testing services to assist enterprises in actively responding to regulatory requirements and effectively improving product compliance. Welcome to contact us at 400-9269-886!
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