UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

WASHINGTON, DC 20460

			OFFICE OF  PREVENTION, PESTICIDES,  AND TOXIC SUBSTANCES

 

MEMORANDUM								July 11, 2007

SUBJECT: 		Product Chemistry of Zinc Naphthenate 

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

			Regulatory Management Branch II

			Antimicrobials Division (7510P)

			

To:			Rebecca Cool, CRM for Naphthenate Salts of Copper and Zinc

			Antimicrobials Division (7510P)

	

					And

			Kathryn Jakob, CRM for Zinc-Naphthenate RED

			Regulatory Management Branch II

			Antimicrobials Division (7510P)

Thru:			Diane Isbell, Team Leader

			Regulatory Management Branch II

			Antimicrobials Division (7510P)

					

					And

			Mark Hartman, Chief

			Regulatory Management Branch II

			Antimicrobials Division (7510P)

PC Code:  			088301

CAS #:				12001-85-3

Chemical Name:		Zinc Naphthenate

Common Name:		Naphthenate Salts

Chemical Formula:		Zn(R-COO)2 where R = various alkyl and cycloalkyl
group

Mol. Wt.:			Variable between 365-665

Molecular Structure:		

  

Physical/Chemical Characteristics of Zinc Naphthenate

	1. Color:		Light Brown

	2. Physical State:	TGAI appears  solid and MP appears  liquid at 25 o C

	3. Odor:		Hydrocarbon-like odor

	4. MP:			Solid

	5.BP:			N/A

	6. Specific Gravity:	0.8- 1.02

	7. Solubility:		15-80 ppm @ 25 C, in water; it is highly soluble
in organic solvents; more in non-polar organics than polar organics.

	8. v. p.			1.0 x 10-5  mm Hg at 25 o C*

	9. Persistence in Air:	No Data

	10. Dissoc Constant:	Not reported/ No Data

	11. Log KOW:		1.0 to 1.2 

	12. pH:		Not reported for TGAI or MP; some formulations report a pH
between 6.5 and 7.0

	13. Stability:		Stable at ambient temperature (22± 2 o  C ) and
elevated temperature ( 53-55 o C) for 14 days (14-day study only).

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

	15. Flammability:	60 o  C

	16. Explodability:	Not explosive

	17. Viscosity:		200 cps at ~ 25 o  C for MP

	18. Miscibility:	Not reported/No Data

	19. Corrosion Char.:	Not Corrosive

	20. Dielectric

	 breakdown voltage:	Dielectric breakdown voltage is not established for
the product. It will not be sued near electrical equipment

				

*	Only one registrant reported the vapor pressure; others either did not
measure or asked for exemption from the requirements.

