## Cover Letter

Designed Nanotubes, LLC (DNT) is developing technology that uses purchased multi-wall carbon nanotubes to make more oxidized and separated carbon nanotube refered to as Hollow Carbon Fibers (HCF) or Molecular Rebar. DNT uses multi-wall cnt's purchased primarily from CNano operating under PMN P-09-257 . To this point Designed Nanotubes has been following the consent order signed by the supplier and the EPA as to protective equipment and safe handling procedures during the research process. During the process DNT uses to separate the individual carbon nanotubes, it does oxidize the surface of the nanotubes more than the original raw material which is typically 1-2%. The Designed Nanotube process gives a product which is 4-10% oxidized, the oxidation in the form of carboxylic acid or salts thereof and so is somewhat chemically different at least in the degree of oxidation. The more oxidized and separated nanotubes are then blended into a variety of materials such as rubber for subsequent use by industrial consumers such as tire companies, retread tire companies and industrial rubber part makers. DNT does not ship the New Substance unless it is formulated as per the consent order. Designed Nanotubes and any participants in the development of these more oxidized and separated carbon nanotubes are asking for this registration to make sure that the rules of TSCA are followed and that the proper registration is obtained.

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## X See Attachment 007 (Molecular structure diagram.pdf)

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MULTI-WALL CARBON NANOTUBES 

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X THIS PRODUCT HAS UTILITY AS AN INTERMEDIATE FOR FORMULATION IN INDUSTRIAL AND MANUFACTURING USES IN A WIDE RANGE OF POLYMERS AND MATERIALS INCLUDING RUBBER, THERMOPLATICS, ENGINEERED PLASTICS, CEMENT, LATEXES, CERAMICS, PHOTOVOLTAIC MATERIALS, CAPACITOR MATERIALS, BATTERY MATERIALS, AND ELECTROSTATIC AND HEAT TRANSFER COATINGS. XXX 

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Purchased multi-wall carbon nanotubes are unloaded in a controlled enviroment into transfer containers and loaded into a reactor containing mixed acids of nitric and sulfuric acid or a nitric acid that are circulated thru a sonicator. The mixture is agitated and temperature controlled at less than 35 C for the mixed acid or between 70 -100 C for the nitric acid. After a time, the mixture is filtered or centrifuged to recover the acid for reuse. The cake is washed with water, base and/or acid to result in a pH neutral wet cake that is the product. This product is mixed into other materials such as rubber. The wash water streams are neutrallized, filtered and sent to an industrial waste treatment site. The purchased multi-wall carbon nanotubes are in special valve bags that will be attached a valve mechanism at the top of the reactor allowing direct connection to the reactor with no exposure to the operators or are transferred to reactor loading devices in a sealed glove box. Cake removal is done in a sealed enviroment using mechanical scrapers and water washes flushed into a tank to eliminate worker exposure. 

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Page 12 SANITIZED SUBMISSIONSee Attachment 002 (Process description.pdf)

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See Attachment 010 (rubber process.pdf)

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Page 17 SANITIZED SUBMISSIONP10SB1(a)(4)1 Part II, Section B, 1(a)(4). Operation Site Locations

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Page 20 SANITIZED SUBMISSION001 PMN-P-09-0257.PDF PMN-P-09-257.PDF Pt.I, Sec.B, 1e(1). 44 002 Process for New Substance Process description.pdf Pt.2, Sec.A, 1d. 1 003 Photo before and after process SEM before and after.pdf 2 004 Thermal analysis of New Substance, before and after TGA before and after.pdf 2 005 MSDS sheet MSDS - dnt ox cnt 7-5-11 - v5.pdf 7 006 information from supplier Raw material data.pdf 3 007 New substance structure Molecular structure diagram.pdf Pt.I, Sec.B, 1e. 1 008 Spectra of new substance Spectra before and after.pdf 2 009 Technical co-contacts Technical co.pdf 1 010 Rubber Process rubber process.pdf Pt.2, Sec.B, 1a. 1

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## ATTACHMENT HEADER SHEET Attachment Number 001 Attachment Name PMN-P-09-0257.PDF 

## Associated PMN Section Number

Pt.I, Sec.B, 1e(1). Does not contain CBI 

## Report Number OCTO111104167770035

## ATTACHMENT HEADER SHEET Attachment Number 002 Attachment Name Process for New Substance 

## Associated PMN Section Number

Pt.2, Sec.A, 1d. Does not contain CBI 

## Report Number OCTO111104167770035

## ATTACHMENT HEADER SHEET Attachment Number 003 Attachment Name Photo before and after process 

## Associated PMN Section Number

N/A Does not contain CBI 

## Report Number OCTO111104167770035

## ATTACHMENT HEADER SHEET Attachment Number 004 Attachment Name Thermal analysis of New Substance, before and after 

## Associated PMN Section Number

N/A Does not contain CBI 

## Report Number OCTO111104167770035

## ATTACHMENT HEADER SHEET Attachment Number 005 Attachment Name MSDS sheet 

## Associated PMN Section Number

N/A Does not contain CBI 

## Report Number OCTO111104167770035

## ATTACHMENT HEADER SHEET Attachment Number 006 Attachment Name information from supplier 

## Associated PMN Section Number

N/A Does not contain CBI 

## Report Number OCTO111104167770035

## ATTACHMENT HEADER SHEET Attachment Number 007 Attachment Name New substance structure 

## Associated PMN Section Number

Pt.I, Sec.B, 1e. Does not contain CBI 

## Report Number OCTO111104167770035

## ATTACHMENT HEADER SHEET Attachment Number 008 Attachment Name Spectra of new substance 

## Associated PMN Section Number

N/A Does not contain CBI 

## Report Number OCTO111104167770035

## ATTACHMENT HEADER SHEET Attachment Number 009 Attachment Name Technical co-contacts 

## Associated PMN Section Number

N/A Does not contain CBI 

## Report Number OCTO111104167770035

## ATTACHMENT HEADER SHEET Attachment Number 010 Attachment Name Rubber Process 

## Associated PMN Section Number

Pt.2, Sec.B, 1a. Does not contain CBI 

## Report Number OCTO111104167770035