MEMORANDUM

DATE:  	July 11, 2006

SUBJECT:	Product Chemistry Science Chapter for Dodecylbenzene Sulfonic
Acid, C10-C16  Derivatives and Sodium Salt

To:	Heather Garvie CRM for  Dodecylbenzene Sulfonic Acid RED

	Regulatory Management Branch II

	Antimicrobials Division (7510P)

From:	A. Najm Shamim, PhD, Chemist

	Regulatory Management Branch II

	Antimicorbials Division II

	

Thru:	Deborah Smegal, Risk Assessor for Dodecylbenzene sulfonic Acid RED

	Health Effects Division (7509P)

			And

	Mark Harman, Chief

	Regulatory Management Branch II

	Antimicrobials Division (7510P)

DP Barcode: 330332

REG#: 4006-26242

		

A	PRODUCT CHEMISTRY SCIENCE CHAPTER ON BENZENE SULFONIC ACIDFOR THE
REREGISTRATION ELIGIBILITY DECISION

Chemical Overview:

	Dodecylbenzene Sulfonic Acid is used as a disinfectant

Chemical Identification

Chemical Name:	Benzene Sulfonic Acid, C10 –C16 Derivatives

Cehmical Family:	Surfactants

CAS#:			6858-22-5

Molecular Formula:	C18H30O3S 

Physical/Chemical Properties

Molecular Wt.:	326.5 

Log KOW:		3.80

MP:			167.7 O C

BP:			437 o  C

Solubility in water:	400 g/L (25 O C)

Vapor Pressure:	5.1 x 10-10 mm Hg (25o C)

Henry Law Constant:	2.8 x 10-11 atm- m3/mol

Half Life in Air:	0.79 days = 9.48 hours ( measured against OH. Radical
reaction)

PRODUCT CHEMISTRY SCIENCE CHAPTER ON BENZENE SULFONIC ACID, DODECYL:
SODIUM SALT

Chemical Overview

	

Dodecylbenzenesulfonic Acid, Sodium Salt is used as a disinfectant

Chemical Identification

Chemical Name:	Dodecyl Benzenesulfonic Acid, Sodium Salt.

Chemical Family:	Surfactants

CAS#:			25155-30-0

Molecular Formula:	C18H29O3S Na

Physical/Chemical Properties

Molecular Wt:		348.48

Log KOW:		1.96

MP:			287.6 o C

BP:			660 o  C

Vapor Pressure:	6.02 x 10-15 mm Hg

Water Solubility:	800 mg/L

Henry Law Constant:	6.02 x 10-17  atm.-m3/mol

Half Life in Air:	0.660 days = 7.9 hours (measured against OH radical
reaction)

Storage Stability:	Stable

Stability to Sunlight:	80% photodegradate at 223 nm within 10 hours.

PRODUCT CHEMISTRY SCIENCE CHPATER ON DODECYLBENZENESULFONIC ACID

Chemical Overview

DodecylBenzeneSulfonic Acid is used as a disinfectant

Chemical Identification

Chemical Name:	Dodecylbenzenesulfonic Acid

Chemical Family:	Surfactants

CAS#:			27176-87-0

Molecular Formula:	C18H30O3S

Physical/Chemical Properties

Molecular Wt.:	326.50

Log KOW:		4.78

MP:			178 o C

BP:			460o C

Vapor Pressure:	7.9 x 10-11  mm Hg

Water Solubility:	400 g/L

Henry Law Constant:	4.8 x 10-11 atm-m3/mol

Half Life in Air:	0.654  days = 7.85 Hours (Measured against OH radical
reaction)

				BIBLIOGRAPHY

				CITATIONS

MRID#

4365640-01 and 02	1.Product Chemistry Data in support of Registration of
Sodium Dodecylbenzenesulfonic Acid and Dodecylbenzenesulfonic Acid by
John Todhunter,  and Kelly White, 1995: SRS International Corp. Lab ID#
DD13SA JV/g63.13

433778-01	2. Physical/Chemical Properties Data on DDBSA and its Salts by
John Todhunter, 1995. SRS International Corp., Study ID#:
DDBS/63-13/Supplemental

	3. US EPA: EPI Suite, A Modeling Program For Chemical and Fate
Properties, Version 3.1, 2003

	4. ChemIDplus: http://chem.sis.nlm.nih.gov/chemidplus/jsp/ChemFull

