MEMORANDUM:							9/30/07

SUBJECT:		Physical/Chemical Characteristics of Busan 77

From:			A. Najm Shamim, PhD., Chemist

			Regulatory Management Branch II

			Antimicrobials Division (7510P)

To:			Talia Lindheimer

			CRM for Busan 77 RED

			Risk Assessment and Science Support Branch

			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)

PRODUCT CHEMISTRY SCIENCE CHAPTER FOR BUSAN 77 REREGISTRATION
ELIGIBILITY DECISION (RED)

Physical /Chemical Properties

Chemical Name:
Poly[oxyethylene(dimethylimino)ethylene(dimethylimino)ethylene
dichloride]  

Trade/Common Names:	WSCP, Busan 77

Empirical Formula:  Variable as the polymeric units differ

Molecular weight:	3886(average)

Structure:

CAS#:		31075-24-8

Color:			Light amber/pale yellow 1, 2

Physical State:	Clear Liquid 1

Odor:			Mildly unpleasant, fishy 1

Stability:		Not applicable/waived1

Oxidation/

Reduction:		Compatible toward metals 1

Flammability:	> 99.5 o C 1

Explodibility:		Not Applicable

Storage Stability:	Stable 3

Miscibility:		Not Applicable 4

Corrosion  

Characteristics:	No evidence of corrosion of the container based on 3
month study 4, 5

Dielectric Breakdown: Not Applicable 5

pH			6.9-7.3 ± 0.011, 2

Viscosity:		1.52 (20 o C), 1.005 ( 40 o)1 mpoise or 393.3 cSt 7 

Melting Point:	Not applicable 2

Boiling Point:		111 o C 2

Density:		1.103- 1.1417 g/cc 1, 2

Dissociation

Constant:		Waived 2, 6

Vapor Pressure:	10.8 mm Hg (20 o ), 14.4 mm Hg (25 o C) 2

Solubility:		Completely soluble in water.7

Octanol/water

Partition Coefficient: Waived 6

	

The Agency notes: 1) The physical/chemical characteristics  studies were
conducted by more than registrants.

2) The P/Chem. Studies were conducted on TGAI which is 60% active in 40%
water.  It is, therefore, likely that some of the measured values may
not be attributed the pure TGAI.  It is particularly noted that a
polymer substance like Busan 77 shows a vapor pressure of 10.8 mmHg at
20 C.  Considering the fact the study was conducted with 60/40:
polymer/water ratio, the large  vapor pressure value may be due to water
vapor.

				Bibliography

MRID#			References

418984-01 	Summers, W. (1991) Product Chemistry for WSCP: Lab Project
Number: 105.01. Unpublished study prepared by Buckman Labs, Int. 31 p.

418984-03 	Bowles, D. (1991) Product Chemistry for WSCP: Lab Project
Number: 20/90-BUC.8: NA 90 9218/1. Unpublished study prepared by Twin
City Testing Corp. and Natec...GmbH. 88 p.

423724-01	Bowles, D. (1991) Product Chemistry for WSCP: Lab Project
Number: NA 909218/1. Unpublished study prepared by Twin City Testing
Corp. and NATEC Institut fur Naturwissenschaftlich-technische Dienste
GmbH. 88 p.

42615901 	Whetzel, J. (1992) Determination of Storage Stability and
Corrosion Characteristics of WSCP: A Supplement: Lab Project Number:
71/91-BUC.2. Unpublished study prepared by Twin City Testing Corp. 29 p.

46832601  	Wo, C. (2006) Physical and Chemical Characteristics: Color,
Physical State, Odor, Oxidation/Reduction, Flammability, pH, Viscosity,
and Density/Relative Density. Project Number: 19425, P801. Unpublished
study prepared by Product Safety Laboratories. 17 p.		

46915602  	Wo, C. (2006) Physical and Chemical Characteristis (830
Series, Group B): Algae Clean Out W. Unpublished study prepared by
Product Safety Laboratories. 6 p.

47120304 	Tillman, A. (2007) Waiver Request for Certain Data
Requirements for WSCP MUP. Project Number: KT/200704. Unpublished study
prepared by Kerley Trading, Inc. 7 p.

