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Canada announced on January 9, 2015, that the New Substances Program has published six new risk assessment summaries for chemicals and polymers, including a summary for multi-wall carbon nanotubes.  Environment Canada and Health Canada conduct risk assessments on new substances.  These assessments include consideration of information on physical and chemical properties, hazards, uses, and exposure to determine whether a substance is or may become harmful to human health or...

The Centers for Disease Control and Prevention (CDC) published a September 20, 2012, Federal Register notice seeking comment on a proposed National Institute for Occupational Safety and Health (NIOSH) exposure assessment and epidemiological study of U.S. workers exposed to carbon nanotubes (CNT) and carbon nanofibers (CNF). The notice states that the proposed research is a cross-sectional study of the current U.S. workforce involved with CNT and CNF in manufacturing and distribution, to be...

The July 3, 2012, edition of the National Institute for Occupational Safety and Health (NIOSH) eNews includes a nanotechnology update, which states that the critical question to address is whether nanomaterials pose health or safety risks to workers employed in their manufacture and industrial use. The update includes the following “notable recent findings and areas of research”: A peer-reviewed paper recently published by NIOSH researchers addressing five areas to help...

The U.S. Environmental Protection Agency (EPA) announced on July 2, 2012, the availability of an external review draft document entitled Nanomaterial Case Study: A Comparison of Multiwalled Carbon Nanotube and Decabromodiphenyl Ether Flame-Retardant Coatings Applied to Upholstery Textiles (EPA/600/R-12/043A). EPA states that the draft document “does not draw conclusions regarding potential environmental risks or hazards of multiwalled carbon nanotubes (MWCNT); rather, it aims to identify...

The NanoRelease Project is intended to support the development of methods to understand the release of nanomaterials used in products. To do this, the Project will: (1) examine full life cycles of nanomaterials in products; (2) work through specific release scenarios at key exposure points of the life cycle; (3) organize existing material characteristics data and measurement methods for those release scenarios; (4) develop a “state of the science” report for release measurement; and (5)...

The U.S. Environmental Protection Agency (EPA) has announced that, in response to public comments, it will provide the public more time to comment on the December 28, 2011, proposed significant new use rules (SNUR) for 17 chemical substances that were the subject of premanufacture notices (PMN). Of particular interest, seven of the PMN substances’ reported chemical names include the term “carbon nanotube” (CNT) or “CNT.” EPA states “the comment period is being...

On September 18, 2011, Nature Nanotechnology posted an article entitled “Cell entry of one-dimensional nanomaterials occurs by tip recognition and rotation.” The authors state that materials with high aspect ratio, such as carbon nanotubes (CNT) and asbestos fibers, have been shown to cause length-dependent toxicity in certain cells because these long materials prevent complete ingestion, which frustrates the cell. The authors note that, while “[b]iophysical models have...

On May 6, 2011, the U.S. Environmental Protection Agency (EPA) promulgated a final significant new use rule (SNUR) under Section 5(a)(2) of the Toxic Substances Control Act (TSCA) for the chemical substance identified generically as multi-walled carbon nanotubes (MWCNT), which was the subject of premanufacture notice (PMN) P-08-199. Under the final SNUR, persons intending to manufacture, import, or process MWCNT for a use that is designated as a significant new use by the final rule must...

The National Institute for Occupational Safety and Health (NIOSH) released a draft Current Intelligence Bulletin (CIB) entitled Occupational Exposure to Carbon Nanotubes and Nanofibers, which recommends that, until results from research studies can fully elucidate the physicochemical properties of carbon nanotubes (CNT) and carbon nanofibers (CNF) that define their inhalation toxicity, employers should take steps to minimize CNT and CNF exposures of all workers and implement an occupational...

On September 22, 2010, the California Department of Toxic Substances Control (CDTSC) and the U.S. Environmental Protection Agency (EPA) held a public workshop on state and federal nanomaterial activities. During the workshop, CDTSC and EPA discussed the results of California’s data call-in (DCI) for carbon nanotubes (CNT), its plans for future DCIs, and EPA’s efforts related to CNTs. The candidate chemicals for CDTSC’s second DCI, which it intends to issue this Fall, include...

On September 17, 2010, the U.S. Environmental Protection Agency (EPA) issued final significant new use rules (SNUR) for two chemical substances that were the subject of premanufacture notices (PMN). The two chemical substances are identified generically as multi-walled carbon nanotubes (MWCNT) (PMN P08177) and single-walled carbon nanotubes (SWCNT) (PMN P08328). Persons who intend to manufacture, import, or process either of these substances for a use that is designated as a...

The California Department of Toxic Substances Control (CDTSC) has rescheduled its workshop on state and federal nanomaterial activities for September 22, 2010. CDTSC, the U.S. Environmental Protection Agency (EPA), and the University of California, Los Angeles (UCLA) are cosponsoring the workshop to discuss the results of California’s carbon nanotube (CNT) information call-in, future data call-in requests for additional nanomaterials, and federal efforts related to CNTs for...

Due to California’s budget issues and resulting furlough for civil service employees, the California Department of Toxic Substances Control (CDTSC) has postponed its August 13, 2010, workshop on state and federal nanomaterial activities. CDTSC, the U.S. Environmental Protection Agency (EPA), and the University of California, Los Angeles (UCLA) are cosponsoring the workshop to discuss the results of California’s carbon nanotube (CNT) information call-in, future data call-in requests for...

On January 8, 2010, the U.S. Environmental Protection Agency (EPA) extended until February 8, 2010, the comment period for its November 6, 2009, proposed significant new use rules (SNUR) for multi-walled carbon nanotubes (CNT) and single-walled CNTs.  According to the January 8, 2010, notice, EPA received a request to extend the comment period.  On December 1, 2009, the U.S. World Trade Organization (WTO) Technical Barriers to Trade (TBT) Inquiry Point at the National Institute of Standards...

On November 6, 2009, the U.S. Environmental Protection Agency (EPA) proposed significant new use rules (SNUR) under Section 5(a)(2) of the Toxic Substances Control Act (TSCA) for two chemical substances that were the subject of premanufacture notices (PMN). EPA identified the substances generically as multi-walled carbon nanotubes and single-walled carbon nanotubes. According to the notice, these substances are subject to TSCA Section 5(e) consent orders issued by EPA. The consent orders...

Today’s Federal Register includes a notice from the U.S. Environmental Protection Agency (EPA) withdrawing the June 24, 2009, final significant new use rules (SNUR) for multi- and single-walled carbon nanotubes (CNT). EPA states that it published the final SNURs using direct final rulemaking procedures. Because EPA received a notice of intent to submit adverse comments on the rules, it is withdrawing the SNURs for CNTs. The Federal Register notice does not identify the...

On July 28, 2009, the U.S. Environmental Protection Agency (EPA) clarified its June 24, 2009, final Significant New Use Rules (SNUR) for multi- and single-walled carbon nanotubes (CNT).  According to EPA, upon review of the final rule, stakeholders asked whether the SNURs applied to all types of CNTs.  EPA responded: This is not the case.  These SNURs only apply to the specific carbon nanotubes that were the subject of the premanufacture notices (PMN)...

According to a notice in the U.S. Environmental Protection Agency’s (EPA) May 11, 2009, Regulatory Agenda, a Toxic Substances Control Act (TSCA) Section 4(a) test rule “may be needed to determine the health effects” of multiwall carbon nanotubes (CNT). EPA states that the results of the tests that could be required under the rule could assist in understanding the health effects of the substance to manage/minimize any potential risk and exposure. Results could also help with...

On April 8, 2009, the National Institute for Occupational Safety and Health (NIOSH) published a Federal Register notice announcing that it “intends to evaluate the scientific data on carbon nanotubes (CNTs) and develop appropriate communication documents, such as an Alert and/or Current Intelligence Bulletin [CIB], which will convey the potential health risks and recommend measures for the safe handling of these materials.” CIBs are issued by NIOSH “to disseminate new...

On March 6, 2009, the United Kingdom (UK) Health and Safety Executive (HSE) published an information sheet on the risk management of carbon nanotubes (CNT). According to HSE, the information sheet “is specifically about the manufacture and manipulation of carbon nanotubes and has been prepared in response to emerging evidence about the toxicology of these materials. However, the risk management principles detailed here are equally applicable to other nanodimensioned...

In a January 22, 2009, letter, the California Department of Toxic Substances Control (CDTSC) announced that it is requiring the submission of data “regarding analytical test methods, fate and transport in the environment, and other relevant information from manufacturers of carbon nanotubes” (CNT). CDTSC states that the term “manufacturers” includes persons and businesses that produce CNTs in California or import CNTs into California for sale.  According to the letter, CDTSC is using...

The Environmental Defense Fund (EDF) recently posted two blog items regarding a consent order negotiated by the U.S. Environmental Protection Agency (EPA). The October 9, 2008, item states that EPA intends to issue a sanitized version of a consent order negotiated with a producer of multiwalled carbon nanotubes (MWCNT). According to EDF, the order was prompted by EPA’s review of a premanufacturing notification (PMN). EDF obtained a redacted copy of the consent order, and...

On May 10, 2007, EHP-in-Press posted an article entitled “Reviewing the Environmental and Human Health Knowledge Base of Carbon Nanotubes.” The authors reviewed the currently available literature about the human health and environmental risk potential of carbon nanotubes (CNT). The authors also investigated the life cycle of the CNT, as release into different environmental compartments may occur at the production stages as well as the product’s usage and disposal...