UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

WASHINGTON, DC 20460

OFFICE OF  PREVENTION, PESTICIDES,  AND TOXIC SUBSTANCES

 

February 2007

MEMORANDUM:

SUBJECT: 	Product Chemistry of Octhilinone for Reregistration
Eligibility Decision (RED)

                                                                        
                                                                        
                                                                        
                                                                        
                                                                        
                               

From:	A. Najm Shamim, Ph.D., Chemist

			Regulatory Management Branch II

			Antimicrobials Division (7510P)

To:	Talia Lindheimer, Chemist/Risk Assessor

			Antimicrobials Division (7510P)

				And

			Kathryn Jakob, CRM for Octhilinone RED

			Regulatory Management Branch II

			Antimicrobials Division (7510P)

Thru:			Mark Hartman, Chief

			Regulatory Management Branch II

			Antimicrobials Division (7510P)

DP Barcode: 		

Chemical Name:        2-n-Octyl-4-isothiazolin-3-one (Octhilinone or
OIT)	

		

PC Code:		099901 

CAS Registry No.      26530-20-1

Physical/Chemical Characteristics of Octhilinone

Common Name:	Octhilinone [Kathon 893T]

Trade Name:	Acticide-45

CAS #:	26530-20-1

Chemical Name:	2-octylisothiazolin-3-one

Chemical Formula:	C11H19NOS

Mol. Wt.:		213.34 g/mol

Molecular Structure:		

  

1. Color:              	Yellow

2.  Physical State: 	Liquid

3. Odor:		Mild

4. m.p.:	N/A

5. b. p:	Not reported

6. Specific Gravity:	1.03

7. Solubility:	0.525 g/L

8. v. p.	3.68 x 10-5 mm Hg @ 25 o C*

9. Dissoc Constant:	5.2 – 6.0 x 10-4 mol/l		

10. logKOW:	3.42

11. pH:	3.4

12. Stability:	No degradation observed for 14 days at 54 o C

13. Oxid/Reduc:                       N/A: Product does not contain any
oxidizing or reducing 

                                                 agents

14. Flammability:	N/A. Product contains no flammable liquids.

15. Explodability:	N/A. Product not explosive

16. Storage Stability:	Stable when stored in ambient conditions

17. Viscosity:	48.04 mm2/s at 20 C and 17.94 mm2/s at 40 oC

18. Miscibility:	Not required

19. Corrosion Char.:		Noncorrosive

20. Dielectric

 breakdown voltage:	Dielectric breakdown voltage is not established for
the product

				

* Industry submitted data on vapor pressure of various products in the
units of millibar or torr.  The average value comes out to be in the
same range. To be consistent Agency converts the vapor pressure units in
mm Hg.

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