### Cover Letter

Center for Regulatory Services, Inc. 5200 Wolf Run Shoals Road * Woodbridge, VA 22192-5755 Telephone 703 590 7337 * Fax 703 580 8637 cfrsrv@aol.com July 8, 2011 U.S. Environmental Protection Agency 1201 Constitution Avenue, Room 6428 TSCA Confidential Business Information Center (CBIC) Washington, DC 20460 Dear Sir or Madam: Enclosed is a CBI PreManufacture Notice (PMN) submission on CD for the substance with the generic chemical name aliphatic diisocyanate, homopolymer, alkanol-blocked.. A unique identifying number has been assigned to the PMN, TS-AK707C, and a check in the amount of $2,500.00 has been sent to the U.S. EPA Headquarters Accounting Operations Branch, Pittsburgh, which has also been marked with the unique identifying number. Please feel free to telephone the undersigned with any questions. Sincerely, William A. Olson, Ph.D. Consultant WAO:gbt PMN AK707C-EPA ltr Enclosures PMN Page 2, Signature of Submitter PMN Page 3, General Information PreManufacture Notice on CD, TS-AK707C cc:	Iwai (11-008) A. Shirai, AKA

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Aliphatic diisocyanate, homopolymer, alkanol-blocked 

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See Attachment 003 (Operation Description SANITIZED scan0001.pdf)

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Page 17 SANITIZED SUBMISSIONPage 18 SANITIZED SUBMISSION001 CAS Report CAS Report SANITIZED scan0001.pdf Pt.I, Sec.B, 2c. 5 002 Chemical Structure Chemical Structure SANITIZED scan0001.pdf Pt.I, Sec.B, 2e. 1 003 OIpeartion Description Operation Description SANITIZED scan0001.pdf Pt.2, Sec.B, 1a. 1 004 MSDS MSDS Sanitized scan0001.pdf 6 005 GPC Data GPC Data SANITIZED scan0001.pdf 2 006 IR Spectrum IR Spectrum SANITIZED scan0001.pdf 1 007 Reverse Mutation Assay Reverse Mutation SANITIZED scan0001.pdf 30 008 Acute Oral Toxicology Acute Oral SANITIZED scan0001.pdf 28 009 Acute Dermal Toxicity Acute Dermal Toxicity SANITIZED scan0001.pdf 28 010 Acute Eye Irritation Acute Eye SANITIZED scan0001.pdf 31 011 Acute Skin Irritation Acute Skin SANITIZED scan0001.pdf 48 012 Skin Sensitization Skin Sensitization SANITIZED 24

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### ATTACHMENT HEADER SHEET
Attachment Number 001 Attachment Name CAS Report 

### Associated PMN Section Number

Pt.I, Sec.B, 2c. Does not contain CBI 

### Report Number PMNX110708086050991

### ATTACHMENT HEADER SHEET
Attachment Number 002 Attachment Name Chemical Structure 

### Associated PMN Section Number

Pt.I, Sec.B, 2e. Does not contain CBI 

### Report Number PMNX110708086050991

### ATTACHMENT HEADER SHEET
Attachment Number 003 Attachment Name OIpeartion Description 

### Associated PMN Section Number

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

### Report Number PMNX110708086050991

### ATTACHMENT HEADER SHEET
Attachment Number 004 Attachment Name MSDS 

### Associated PMN Section Number

N/A Does not contain CBI 

### Report Number PMNX110708086050991

### ATTACHMENT HEADER SHEET
Attachment Number 005 Attachment Name GPC Data 

### Associated PMN Section Number

N/A Does not contain CBI 

### Report Number PMNX110708086050991

### ATTACHMENT HEADER SHEET
Attachment Number 006 Attachment Name IR Spectrum 

### Associated PMN Section Number

N/A Does not contain CBI 

### Report Number PMNX110708086050991

### ATTACHMENT HEADER SHEET
Attachment Number 007 Attachment Name Reverse Mutation Assay 

### Associated PMN Section Number

N/A Does not contain CBI 

### Report Number PMNX110708086050991

### ATTACHMENT HEADER SHEET
Attachment Number 008 Attachment Name Acute Oral Toxicology 

### Associated PMN Section Number

N/A Does not contain CBI 

### Report Number PMNX110708086050991

### ATTACHMENT HEADER SHEET
Attachment Number 009 Attachment Name Acute Dermal Toxicity 

### Associated PMN Section Number

N/A Does not contain CBI 

### Report Number PMNX110708086050991

### ATTACHMENT HEADER SHEET
Attachment Number 010 Attachment Name Acute Eye Irritation 

### Associated PMN Section Number

N/A Does not contain CBI 

### Report Number PMNX110708086050991

### ATTACHMENT HEADER SHEET
Attachment Number 011 Attachment Name Acute Skin Irritation 

### Associated PMN Section Number

N/A Does not contain CBI 

### Report Number PMNX110708086050991

### ATTACHMENT HEADER SHEET
Attachment Number 012 Attachment Name Skin Sensitization 

### Associated PMN Section Number

N/A Does not contain CBI 

### Report Number PMNX110708086050991