| Main Title |
Activated Sludge Respiration Inhibition Test of Dow Corning 36 Emulsion, with Cover Letter dated 10/15/1998. |
| CORP Author |
Wildlife International, Auburn, AL.; Dow Corning Corp., Midland, MI.; Environmental Protection Agency, Washington, DC. Office of Toxic Substances. |
| Year Published |
1998 |
| Stock Number |
OTS0573853 |
| Additional Subjects |
Toxicology ;
Health effects ;
Dimethyl silicones ;
Dimethyl siloxanes ;
Environmental fate ;
Biodegradation ;
CAS No 75-07-0 ;
CAS No 631488-62-9 ;
CAS No 67762-90-7
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
OTS0573853 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
77p |
| Abstract |
The effect of the test substance on activated sludge microorganisms was assessed by the Activated Sludge Respiration Inhibition Test Method (OECD Guideline 209). The test contained a control, reference and treatment groups. The control group was used to determine the background respiration rate of the sludge and was not dosed with the test or reference substance. The reference group was dosed with 3,5-dichlorophenol, a known inhibitor of respiration, at concentrations of 3, 15 and 50 mg/L. The test substance was dosed at 1, 3, 10, 30, 100, 300, and 1000 mg/L. After an exposure period of 3 hours, the respiration rates of the test solutions were measured using a dissolved oxygen meter. The respiration rates in the two controls were 41.2 and 48.4 mg O,/L/hr, or a difference of 14.9%. The difference in control respiration rates was within the 15% difference limit established for the test. The validity of the test was further supported by the results from the 3,5-dichlorophenol reference group, which resulted in an EC50 of 8.6 mg/L. The EC50 was within the 5 to 30 mg/L range considered acceptable for the test. |
| Supplementary Notes |
The quality of the documents listed in the Office of Toxic Substances database may not meet usual NTIS standards but are included to further the opportunity for the scientific and technical community to locate materials which may not be available elsewhere. The content is the responsibility of OTS. Sponsored by Environmental Protection Agency, Washington, DC. Office of Toxic Substances. |
| Availability Notes |
Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| PUB Date Free Form |
22 Oct 1998 |
| Category Codes |
57Y; 57U; 68G; 99; 44G |
| NTIS Prices |
PC A06/MF A06 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
028701140 |
| Origin |
NTIS |
| Type |
CAT |
