## Cover Letter

The original submission was marked as incomplete due to chemical identity issues. These have been corrected and the PMN is being resubmitted.

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### 25AMPTLP DO48130610688359468 DO481W

X X

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### X

Page 3 SANITIZED SUBMISSIONJeffrey Hafer Regulatory The Dow Chemical Company 727 Norristown Road Spring House PA 19477 jhafer@dow.com

Jeffrey Hafer Regulatory The Dow Chemical Company 727 Norristown Road Spring House PA 19477 jhafer@dow.com 215-619-5552 

## X

X X XXX 

## X Page 4 SANITIZED SUBMISSIONPage 5 SANITIZED SUBMISSIONPage 6 SANITIZED SUBMISSION

## X

XXX XXX XXX GPC Public.pdf



### XXX XXX X XXX 

### X 0.9 

### XXX XXX X XXX 

### X 0.09 

### XXX XXX X XXX 

### X 2.8

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## X 328731 IES Public.pdf 

## X XXX

XXX See Attachment 001 (Structure Public.pdf)

Structure Public.pdf Page 8 SANITIZED SUBMISSIONXXX

XXX polyalkylene glycol, alpha isocyanate, omega silane 

## X X XXX XXX XXX 

### X XXX XXX XXX 

### X

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### XXX XXX 

## X

Chemical intermediate for polyurethane polymer XXX 

### X 100 100 0 0 100 0

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## X XXX XXX XXX 

## X 1

XXX 

## X The Dow Chemical Company Ringwood 5005 Barnard Mill Road Ringwood McHenry IL 60072-0238

Page 11 SANITIZED SUBMISSIONPage 12 SANITIZED SUBMISSIONSampling reactor Monogoggles, gloves and protective clothing, respirator viscous liquid, 100% 2 XXX XXX 

### X Product Packaging Monogoggles, gloves and protective clothing viscous liquid, 100% 3 XXX XXX 

### X Reactor cleaning Monogoggles, gloves and protective clothing, respirator liquid, 1% 2 2 8

Page 13 SANITIZED SUBMISSION1 1 kg/batch Off-site Incineration Lab samples; incinerated 99.99% efficiency 0.0001 kg/batch XXX XXX XXX XXX XXX 

### X X

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## X XXX XXX XXX 

## X 1

XXX 

## X Dow Chemical LaPorte 550 Battleground Road La Porte Harris TX 77571

Page 15 SANITIZED SUBMISSIONSee Attachment 004 (Intermediate Use Public.pdf)

Intermediate Use Public.pdf Page 16 SANITIZED SUBMISSIONSampling Monogoggles, gloves and protective clothing, respirator liquid, 100% 2 XXX XXX 

### X Loading into reactor Monogoggles, gloves and protective clothing, respirator liquid, 100% 3 XXX XXX 

### X

Page 17 SANITIZED SUBMISSION1 1 kg/batch Off-site Incineration Lab sample incincerated; 99.99% efficiency 0.0001 kg/batch XXX XXX XXX XXX XXX 

### X X

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### 0

Page 19 SANITIZED SUBMISSIONPage 20 SANITIZED SUBMISSIONDuring manufacturing, we implement quality control methods that require only a very small amount of samples. For example FTIR and GPC are

used for quality control purposes, where the sample quantity needed is less than 0.5 grams thus minimizing operators' exposure to chemicals including PMN substance. During processing, vacuum is also used to capture any volatile materials that are sent for incineration, thus eliminating exposure entirely. Also, this particular technology, using this intermediate prepolymer, results in a final polymer with < 0.1% isocyanate (as measured by titration of total isocyanate groups – free and bound to oligomers). In addition, the high molecular weight nature of the polymer also prevents material from becoming airborne and after exposure to moisture, the PMN substance crosslinks further preventing it from getting into air or water streams.

Page 21 SANITIZED SUBMISSION001 structurePublic Structure Public.pdf Pt.I, Sec.B, 2e. 1 002 IES Public IES Public.pdf Pt.I, Sec.B, 2c. 1 003 Intermediate Manufacturing Public Intermediate Manufacturing Public.pdf 1 004 Use Diagram Public Intermediate Use Public.pdf Pt.2, Sec.A, 1d. (#2) 1 005 IR Spectrum Public IR Public.pdf 1 006 GPC Report Public GPC Public.pdf Pt.I, Sec.B, 2a. 2 007 SDS Public SDS Public.pdf 10 008 Additional Technical Contact Additional Technical Contact.pdf 1

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## X Measured

insoluble/reactive

N/A Negligible due to reaction with water

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## ATTACHMENT HEADER SHEET Attachment Number 001 Attachment Name structurePublic 

## Associated PMN Section Number

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

## Report Number DO48130610688359468

## ATTACHMENT HEADER SHEET Attachment Number 002 Attachment Name IES Public 

## Associated PMN Section Number

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

## Report Number DO48130610688359468

## ATTACHMENT HEADER SHEET Attachment Number 003 Attachment Name Intermediate Manufacturing Public 

## Associated PMN Section Number

N/A Does not contain CBI 

## Report Number DO48130610688359468

## ATTACHMENT HEADER SHEET Attachment Number 004 Attachment Name Use Diagram Public 

## Associated PMN Section Number

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

## Report Number DO48130610688359468

## ATTACHMENT HEADER SHEET Attachment Number 005 Attachment Name IR Spectrum Public 

## Associated PMN Section Number

N/A Does not contain CBI 

## Report Number DO48130610688359468

## ATTACHMENT HEADER SHEET Attachment Number 006 Attachment Name GPC Report Public 

## Associated PMN Section Number

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

## Report Number DO48130610688359468

## ATTACHMENT HEADER SHEET Attachment Number 007 Attachment Name SDS Public 

## Associated PMN Section Number

N/A Does not contain CBI 

## Report Number DO48130610688359468

## ATTACHMENT HEADER SHEET Attachment Number 008 Attachment Name Additional Technical Contact 

## Associated PMN Section Number

N/A Does not contain CBI 

## Report Number DO48130610688359468