Acute Toxicity of Phos-Check (Trade Name) 202 and Diammonium Phosphate to Fathead Minnows.
Abstract
Fathead minnows were exposed to diammonium phosphate (DAP) and PHOS-CHECK 202 (PC202) during static and dynamic bioassays. In static bioassays the 96 hour LC50 of DAP was 155 mg/l. The 96 hour LC50 of PC202 was 1320 microliters of the fire-retardant slurry per liter. The DAP concentration in the PC202 slurry would have been 150 mg/l at the 96 hour LC50 concentration. The incipient LC50 based on dynamic bioassays was 1022 microliters slurry per liter. Based on EPA recommendations of un-ionized ammonia not exceeding 0.02 mg/l, the recommended limit for PC202 was 66 microliters slurry or 3 mg DAP per liter at pH 7.8. At higher pH values the DAP or PC202 recommended concentrations would be even lower.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1974
- Accession Number
- ADA006122
Entities
People
- Roger C. Inman