Product Safety & Regulatory Affairs status of TUBALL™ graphene nanotubes

As the world’s largest producer of single wall carbon nanotubes (SWCNTs), OCSiAl is taking the lead in raising transparency of the nature of nanotubes and their responsible handling. The company has an ongoing policy of initiating its own as well as external independent testing and research, and it has already accumulated a significant knowledge base on the morphology of TUBALL™ nanotubes, and on their safe handling and use in the workplace. TUBALL™ is compliant with all the relevant international, national and regional requirements of the world’s key markets, including the EU and the USA.


TUBALL™ carbon nanotubes are extremely thin single-layer rolled-up sheets of graphene that are more than 5 µm in length and have a diameter of 1.6 (±0.4) nm. They have a number of exceptional characteristics, such as superior electrical conductivity, strength, and temperature and chemical stability. TUBALL™ nanotubes have high flexibility and consequently, they have a number of completely different features in terms of health & safety and environmental considerations.

According to the German Federal Institute for Occupational Safety and Health (BAuA), SWCNTs have an elastic (Young’s) modulus that is about 3 times higher than that of multi wall carbon nanotubes (MWCNTs). Their diameter of 1.6 (±0.4) nm is, however, at least 5–10 times smaller than that of MWCNTs, which have a diameter of 9–18 nm. Compared with MWCNTs, SWCNTs are therefore extremely flexible and have nothing like the rigidity of MWCNTs with different sizes.

This extreme flexibility, which is clearly visible on a transmission electron microscope (TEM) analysis, together with their propensity to reduce surface energy, means that SWCNTs tend to spontaneously form bundles or agglomerates.

Therefore, TUBALL™ nanotubes cannot be made respirable and show no rigidity.

According to the International Agency for Research on Cancer (IARC), TUBALL™ nanotubes are classified as Group 3, i.e. substances that are “unclassifiable as to carcinogenicity in humans”.


In May 2018, OCSiAl conducted a number of case studies in the workplace to measure workers’ possible inhalation exposure to nanoparticles. These case studies on TUBALL™ nanotubes showed that the amount of nanotubes released during field-test sampling was well below the NIOSH REL of 1 µg/m3 8h TWA (< 5% NIOSH REL). In the specific case studies on the handling and processing of some TUBALL™-containing mixtures or during their production, no free-standing nanotubes were observed.


In nanoaugmented products, the nanotubes are normally embedded into a matrix so there is no risk of them being exposed (various polymer nanocomposites with TUBALL™ were tested, such as HDPE, epoxy and natural elastomer). In 2017, VITO, a leading European independent research and technology institute, conducted exposure monitoring studies during various operations (including cutting, grinding, sanding and drilling). The tests on pure polymer samples and on TUBALL™-augmented epoxy, polyethylene and elastomer materials were carried out inside a test chamber so that any aerosol release could be captured and measured with a TEM. These tests confirmed the absence of free-standing or protruding nanotubes.


OCSiAl is continuing its responsible approach to health & safety and environmental issues by bringing its products in line with global standards and specific international, national and regional requirements.


OCSiAl was the first and currently remains the only company to be authorized to undertake large-volume commercial shipments and marketing of SWCNTs in Europe, North America and other key global markets. TUBALL™ SWCNTs are the first to be registered in accordance with the EU’s REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) regulations: in September 2016, TUBALL™ nanotubes were registered under the number 01-2120130006-75-0000. With the tonnage band upgrade, which is compliant with REACH Annex VIII, as of April 2020, OCSIAl has increased its allowed commercialization volumes in Europe up to 100 tonnes of nanotubes annually.

TUBALL™ is regulated as a new chemical substance by the US EPA. In 2019, OCSiAl’s regulatory status with the EPA took a major step forward with the publication of a SNUR in the Federal Register covering OCSiAl’s products, which authorizes unlimited nanotube sales up and down the supply chain in the USA.

The company’s near-term plans include scaling-up the permitted volume of industrial commercialization of graphene nanotubes in a number of countries, including Australia and Canada.

The company is continuing with the registration of TUBALL™ nanotubes around the world.


OCSiAl can deliver on a frequent basis various statements of compliance for TUBALL™ nanotubes and for any TUBALL™-containing products. Most statements are valid for a short period depending on the regulation update(s) or specific requirements from the industry. For example, confirmation letters of compliance, available upon request, include the RoHS, SVHC, GADSL, PAH, WGK, Halogen-free, VOC, Global chemical inventory and many more.

TUBALL™ is regulated as a new chemical substance by the US EPA. In 2019, OCSiAl’s regulatory status with the EPA took a major step forward with the publication of a SNUR in the Federal Register covering OCSiAl’s products, which authorizes unlimited nanotube sales up and down the supply chain in the USA.

Health hazards control working with TUBALL FAQs
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Safe Handling and Use of TUBALL
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Regulatory information sheet
pdf385.61 kB

Contact the OCSiAl Product Safety & Regulatory Affairs Lead Manager in case of any additional questions


June 17
[💡R&D] A unique thick cathode structure with TUBALL™ for kinetics-enhanced Li–S batteries has been described in an article published in the Journal of Power Sources. 🚀 The well-interconnected channels and crosslinked SWCNT network enhance sulfur utilization and reaction kinetics, suppressing polysulfide shuttling and volume expansion. This 3D-printed TUBALL™-containing cathode delivers outstanding gravimetric/areal capacity (752 mAh g^−1/6.41 mAh cm^−2 at 0.5C) and excellent cycling performance with a high sulfur loading of 8.6 mg cm^−2. 🔋✨ Read the article in full here: Learn more on SWCNTs: #LiS #batteries #ThickCathode
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June 13
[#BreakingNews] 🚀 OCSiAl has completed a 3,000 MT single wall carbon nanotube water-based dispersion production site in Serbia, Europe! 🌍 This new facility will support various EV and consumer electronics projects by boosting the performance of Li-ion battery cells with energy-dense, silicon-rich, or fast-charging graphite anodes. 🔋✨ Scheduled to commence commercial production in the third quarter of 2024, this facility serves as an industrially scalable unit for SWCNT dispersion production and will be replicated by OCSiAl elsewhere in Europe, Asia, and the US. Read the news in full: Learn more on graphene nanotube applications and uses: #dispersions #ProductionSite #EV #batteries
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June 12
[#video] Even a small amount of graphene nanotubes mixed into any material can significantly improve it. Curious to learn why? Check out our video! 📼Watch the full 3-minute video here: Learn more about TUBALL™ nanotubes:
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