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Learning Center > Flooring > Carpet > 
Carpet

44 Reasons Why We Don’t Sell Synthetic Carpeting

Joel Hirshberg

by Green Building Supply's
Joel Hirshberg
February 4, 2021
Average reading time: 18 minutes

Healthy Building Network reveals 44 toxic chemicals

 

If you have carpeting in your home, you probably have no idea what you and your family are walking on or breathing every day. Don’t feel bad! Few people do—until now, thanks to a report by the Healthy Building Network (HBN).

Through their excellent research, you’ll learn what you’ve always wanted to know and what few carpet manufacturers have wanted to tell you. That is, in part, because they didn’t have to. Federal and state regulations, as well as third-party certification organizations, don’t restrict many of these chemicals. Due to the lack of transparency in the carpet industry, it’s next to impossible to pinpoint all the materials used in every type of carpet. Consequently, consumers are left in the dark and must trust salespeople and product reviews for guidance as to which carpets are the safest.

According to HBN:

“Neither manufacturers, nor third party organizations that certify carpet products, provide a full accounting of these substances. Many carpets, carpet pad, and carpet adhesives have obtained product certifications that assert certain attributes, like being free of “Red List” chemicals or VOCs; however, the standards upon which the certifications are based do not consider most of the 44 priority toxic substances we identified that are used in carpet.”

But now, HBN has uncovered the sources of the strong chemical odors that we’ve all encountered when we walked into a newly carpeted room. This list includes numerous known and suspected carcinogens such as formaldehyde and benzene as well as countless other volatile organic compounds (VOCs). Now that many of us are spending the majority of time indoors due to the COVID-19 pandemic, it’s imperative to understand the impact of carpet on our indoor air quality, health, and wellbeing.

 

 

44 Reasons why we don't sell synthetic carpeting

 

In their original study, the Consumer Product Safety Commission identified at least 30 chemicals released by synthetic carpets. (“Carpets and Rugs Business Guidance.” United States Consumer Product Safety Commission. Accessed October 5, 2017) This new study by HBN has discovered some 44 hazardous chemicals present in most synthetic carpet. Not every carpet contains all 44, of course, but each carpet has some of them and many carry most of them. See the end of this document to see all 44.

How is synthetic carpet made?

Modern carpeting is made primarily from synthetic-based fibers such as nylon, polyester, polypropylene (olefin), recycled PET (polyethylene terephthalate), and the newest fiber Triexta (aka Smartstrand, Sorona, and PTT—all of which are modified versions of polyester). While all of these are derived from petroleum as their main ingredient, they are often treated with additional chemicals that provide stain proofing, moth protection, and fire resistance.

To prevent mold and mildew, carpets are further treated with additional chemical fungicides and pesticides. Fibers are then attached (tufted) into a backing crafted mainly of polypropylene with the help of synthetic rubber, polyurethane, polyvinyl chloride, or ethylene-vinyl acetate. Many of these synthetic chemicals have been found to outgas chemicals for many months or even years. They’ve been associated with symptoms such as eye, ear, nose, and throat irritations; heachaches; skin irritation; coughing or shortness of breath, and fatigue. The impact on children and domestic pets is even more acute because they spend much of their time in direct contact and within close proximity to carpet.

Your right to know.

We believe consumers have a right to know what they are buying. You may find the attached report helpful in educating you about carpeting you have already purchased or may purchase in the future. We believe that informed consumers who vote with their dollars are the best drivers of market change.

7 Categories of chemicals found in synthetic carpet, backing and cushion

Below is a summary of the general categories of chemicals. For those wanting to see all 44 presented technically, refer to the end of this article.

  1. Stain repellent treatments contain short-chain per and poly-fluoroalkyl substances (PFAS). These are potent developmental and reproductive toxicants that can be inhaled or ingested throughout the lifecycle of production, use, and disposal.
  2. Antimicrobial preservatives protect plastic ingredients from biological degradation, including highly toxic triclosan, an endocrine disruptor, and formaldehyde, a known carcinogen. (California Prop 65 )
  3. Isocyanates, the main ingredient of polyurethane in the carpet backing, is a highly potent respiratory hazard that is not recyclable.
  4. Polyvinyl chloride (PVC), widely used as a binder in carpet tile and carpet backing contains heavy metal stabilizers such as organotins and phthalate plasticizers. These are well-known toxicants to humans and aquatic life and can produce cancer, in addition to causing developmental and reproductive harm.
    Scientists are finding alarming correlations between phthalates and asthma and human neurological diseases. Even though many manufacturers are phasing out phthalates, they still use PVC, whose production inherently relies on toxic inputs and produces toxic byproducts. These include chlorine, chloroform, and highly carcinogenic dioxins, vinyl-chloride monomers, and ozone-depleting chemicals like carbon tetrachloride.
  5. Flame retardants, used in polyurethane and latex backings as well as some specialty fibers. Some of these flame retardants are halogenated, which means they contain chlorine or bromine. These are linked to hyperactivity, learning disabilities, reproductive harm, and cancer. The common replacements are not much better as they contain organophosphates, which are linked to endocrine disruption and infertility.
    Flame retardants are emitted from carpet into dust that becomes airborne during use as well as from operations that recycle and dispose of carpet waste. Unfortunately, these chemicals persist and bioaccumulate up the food chain. They are also found in bonded carpet padding.
  6. Fly ash, a byproduct of coal-fired power plants, is widely used as filler in carpet tile. While this is considered “recycled content” and contributes to LEED points, it is nonetheless unhealthy. Pollution control devices on power plants transfer mercury, a potential neurotoxicant, from air emissions into fly ash. Astonishingly, some carpet, by weight, is 40 percent fly ash.
  7. Adhesives, such as bisphenol A and nonylphenol ethoxylates, have both been found to be neurotoxicants that cause endocrine disruption.
Is there any hope for a safer carpet?

It’s not all gloom and doom. Industry-wide, DuPont, among others, has begun replacing petroleum with corn glucose by up to 37%, Shaw has stopped using fly ash as a filler, and many, but not all, manufacturers have phased out phthalates.

Recycling is not the answer

While we are all for recycling synthetic carpet and closing the environmental loop from cradle to grave, it does not solve the real problems related to toxic exposures during the process of manufacturing, installation, use and disposal. One of the major goals of recycling is to prevent these toxins from entering landfills and bioaccumulating for thousands of years and eventually ending up in our food chain. While this is a laudable goal, recycling in no way guarantees that hazardous air pollutants won’t emit all over again.

In the opinions of HBN and Green Building Supply, the potential environmental and human health impacts of these toxins should be fully disclosed and assessed long before ever entering the marketplace. When safer, biodegradable, and sustainable alternatives exist, there is no reason for carpet manufacturers to use toxic substances. Nor is there any reason for consumers to buy them, for third parties to certify them, or for government regulators to allow them on the market.

What are the alternatives?

There are several sustainable, eco-friendly carpet options that can minimize indoor pollution and mitigate health problems caused by toxic carpets. Durable, stylish, and often less expensive than conventional floors and carpets, these sustainable options provide a responsible and healthier way to enhance your home.

These natural alternatives include 100% wool, sisal, jute, cotton, and silk. Most of these contain either reduced or no hazardous chemicals at all. Most wool carpeting, for example, will outlast synthetic carpets by a factor of 3 to 1. They also have a much lower carbon footprint, are fully biodegradable and perform as good or better than their toxic counterparts.

At Green Building Supply, your health and safety always have been and always will be our top priority. That’s why we offer several brands of wool carpeting made with the purest natural ingredients. Now you know why we don’t sell synthetic carpet. For more info on our wool carpet, click here.

Below is a chart of all 44 chemicals found in synthetic carpet. Again, not all are in every carpet.

SubstanceCAS No.Human Health and Environmental Hazards
Per- and Polyfluoroalkyl Substances (PFAS) used in Stain Repellants There are at least 3,000 chemicals in the PFAS chemical group.[1] They are also sometimes referred to as PFCs (perfluorinated chemicals). Some, like PFOA (C-8) are relatively well-researched and regarded as developmental and reproductive toxicants. Most have not been individually assessed for health and environmental hazards. “[Perfluorinated Chemicals] break down very slowly in the environment,” notes the National Institute of Environmental Health Sciences. It can take several years for PFASs to leave the human body. As a class, these chemicals “have potential similarities in chemical properties and toxicity…. More research is needed.”[2]
2-Propenoic acid, 2-methyl-, 3,3,4,4,5,5,6,6,7,7,8,8,8- tridecafluorooctyl ester2144-53-8Unknown
2-Propenoic acid, 3,3,4,4,5,5,6,6,7,7,8,8,8- tridecafluorooctyl ester17527-29-6Unknown
Perfluorohexanoic acid (PFHxA, C-6)307-24-4PBT (Persistent Bioaccumulative Toxicant), Potential Endocrine Disruptor
Hexane, 1,6-diisocyanato-, homopolymer, 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluoro-1- octanol-blocked357624- 15-8Unknown. This polymer is based on fluorotelomers.
Antimicrobials  
IPBC (3-iodo-2-propynyl butylcarbamate)55406-53-6Developmental, Potential Endocrine Disruptor, Serious eye damage, Skin sensitization, Organ toxicant, Very toxic to aquatic life (Acute and chronic)
Methylchloroisothiazolinone (CIT, CMIT)26172-55-4Mammalian, Eye and skin irritation, Acute aquatic toxicant, Very ecotoxic to terrestrial vertebrates.
Silver nanoparticles7440-22-4Nano-form hazards unknown. Skin sensitizer, organ toxicant, acute aquatic toxicant.
Silver sodium hydrogen zirconium phosphate265647- 11-8Nano-form hazards unknown. Skin sensitizer, organ toxicant, acute aquatic toxicant.
Triclosan3380-34-5PBT, Endocrine Disruptor, Acute and chronic aquatic toxicant.
Urea Formaldehyde9011-05-6Respiratory (sensitizer-induced asthmagen)
Zinc Pyrithione (ZPT)13463-41-7Reproductive, Mammalian, Eye and skin irritation, Skin sensitizer, Organ toxicant, and acute and chronic aquatic toxicant.
Isocyanates There is strong evidence that, as a group, isocyanates cause the onset of asthma disease.
Diphenylmethane diisocyanate (MDI) - non isomer specific26447-40-5“A skin, eye, and respiratory tract irritant; Allergic contact dermatitis, contact urticaria, asthma, and hypersensitivity pneumonitis reported from occupational exposure.” (National Institutes for Health Haz-Map)[3]
Methylene bisphenyl diisocyanate (pure MDI)101-68-8Developmental, respiratory toxicant.
Polymeric MDI (PMDI)9016-87-9Developmental, respiratory, mammalian, and organ toxicant.
Organotins  
Dibutyltin sulfide4253-22-9PBT.
Dibutyltin dilaurate77-58-7PBT, Reproductive, Endocrine disruption, Gene mutation, Eye and skin irritation, Organ toxicant, Ecotoxic to terrestrial vertebrates, Acute and chronic aquatic toxicant.
Dibutyltin bis(2-ethylhexyl thioglycolate)10584-98-2PBT
Polyvinyl Chloride (PVC) Most direct health and environmental impacts of PVC occur during production -- where highly toxic chemicals like dioxins, vinyl chloride, carbon tetrachloride, and chloroform -- are released; through the use of toxic additives like phthalates; and, at the end of life, via emissions from incinerators and cement kilns that burn PVC.
Poly(vinyl chloride-co-methyl acrylate)25035-98-7 
Polyvinyl Chloride 9002-86-2Asthmagen (likely dust form).
Butyl Benzyl Phthalate (BBP)85-68-7Developmental and Reproductive Toxicant, Endocrine Disruptor. Possible carcinogen. Very toxic to aquatic life (acute and chronic).
Dibutyl Phthalate (DBP)84-74-2Developmental and Reproductive Toxicant, Endocrine Disruptor. Evidence of carcinogenic effects.Skin sensitizer. Organ Toxicant. Very toxic to aquatic life (acute and chronic).
Diisoheptyl phthalate (DIHP)71888-89-6Developmental and Reproductive Toxicant.
Diisononyl phthalate (DINP-1, mixture of isomers as manufactured)68515-48-0Carcinogen. Developmental Toxicant. Endocrine Disruptor.
Diisononyl phthalate (DINP-A)71549-78-5Carcinogen. Reproductive Toxicant.
Diisononyl phthalate (DINP-2 or DINP-3, mixture of isomers as manufactured)28553-12-0Carcinogen. Developmental Toxicant. Endocrine Disruptor
Filler  
Fly Ash68131-74-8 and 69012- 84-6Many hazards associated with constituents of fly ash, including heavy metals and polycyclic aromatic compounds.
Styrene100-42-5Carcinogen, Developmental and Reproductive Toxicant, Neurotoxicant, Endocrine Disruptor, Mutagen, Asthmagen, Acute Aquatic Toxicant.
Flame Retardants  
Decabromodiphenyl ether (Deca-BDE)1163-19-5PBT, Neurotoxicant, Developmental Toxicant, Gene Mutagen, Endocrine Disruptor.
bis(2-ethylhexyl) tetrabromophthalate (TBPH)26040-51-7PBT, Developmental Toxicant, Endocrine Disruptor, Acute and chronic aquatic toxicant.
tris(2-chloroethyl)phosphate (TCEP)115-96-8Carcinogen, Reproductive Toxicant, Gene Mutagen, Organ Toxicant.
Antimony trioxide1309-64-4Carcinogen, Developmental, Reproductive and Organ Toxicant.
PentaBDE32534-81-9PBT, Carcinogen, Developmental Toxicant, Neurotoxicant, Endocrine Disruptor, Acute and Chronic Aquatic Toxicant.
TDCPP13674-87-8PBT, Carcinogen, Endocrine Disruptor, Acute and Chronic Aquatic Toxicant.
V6 (2,2-bis(chloromethyl)propane1,3-diyltetrakis(2-chloroethyl) bisphosphate)38051-10-4PBT, Endocrine Disruptor.
Firemaster 550 component IPTP (isopropylated triphenyl phosphate)68937-41-7PBT, Developmental Toxicant, Neurotoxicant, Chronic Aquatic Toxicant.
Firemaster 550 component TPP (triphenyl phosphate)115-86-6Endocrine Disruptor, Acute Toxicant, Acute and Chronic Aquatic Toxicant.
Firemaster 550 component TBB (2-ethylhexyl-2,3,4,5- tetrabromobenzoate)183658- 27-7PBT, Developmental Toxicant, Endocrine Disruptor, Acute and Chronic Aquatic Toxicant
Firemaster 550 component TBPH (Bis(2-ethyl1-hexyl) tetrabromophthalate26040-51-7PBT, Developmental Toxicant, Endocrine Disruptor, Acute and Chronic Aquatic Toxicant.
Adhesives (Bisphenol A and related compounds)  
Bisphenol A (BPA)80-05-7Developmental and Reproductive Toxicant, Endocrine Disruptor, Eye Irritant, Skin Sensitizer.
Bisphenol A Diglycidyl Ether (BADGE)25085-99-8Endocrine Disruptor. See BPA above for hazards associated with monomer.
Bisphenol A, epichlorohydrin polymer, diethylenetriamine adduct68610-56-0Monomers (BPA and epichlorohydrin) have multiple health hazards. BPA: listed above. Epichlorohydrin: Carcinogen, Reproductive Toxicant, Gene Mutagen, Developmental Toxicant, Endocrine Disruptor, Mammalian Toxicant, Eye and Skin Irritant.
Bisphenol A - epichlorohydrin condensate25068-38-6See row above.
Adhesives (surfactant)  
4-Nonylphenol (branched)84852-15-3PBT, Endocrine Disruptor, Developmental & Reproductive Toxicant, Eye and Skin Irritant, Aquatic Toxicant (acute and chronic).

Note: PBT = Persistent, Bioaccumulative Toxicant (PBT)

1 “Work Plan Implementation: Perfluoroalkyl and Polyfluoroalkyl Substances (PFASs) in Carpets, Rugs, Indoor Upholstered Furniture, and Their Care and Treatment Products.” Safer Consumer Products Branch, CA Department of Toxic Substances Control, November 15, 2016. https:// www.dtsc.ca.gov/GetInvolved/ReviewPanel/upload/DTSC-Work-Plan-Implementation-Perfluoroalkyl-and-Polyfluoroalkyl-Substances-inCarpets-Rugs-Upholstered-Furniture-and-Their-Care-and-Treatment-Products-11-15-16.pdf.

2 Perfluorinated Chemicals (PFCs).” National Institute of Environmental Health Sciences, July 2016. https://www.niehs.nih.gov/health/materials/ perflourinated_chemicals_508.pdf.

3 “Methylenediphenyl Diisocyanate.” Haz-Map. Accessed October 10, 2017. https://hazmap.nlm.nih.gov/category-details?id=13260&table=cop ytblagents.


(For the complete white paper, read the HBN article here which includes an in-depth explanation of all of 44 chemicals included in these seven categories.)

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