Deicing Products > Cryotech NAAC® Commercial
SUMMARY
Tests with NAAC show it readily biodegrades at low temperatures and has a relatively low biological oxygen demand (BOD) compared to urea. Toxicity tests rate NAAC as "relatively harmless" to aquatic life, the most favorable classification used by the environmental community. For these reasons, NAAC is considered safe for the environment. The following general summary of environmental and hazard information is provided.
BIODEGRADABILITY
Method
BOD5 at 20°C (68°F) = 0.58 g oxygen/g or g O2/g EPA 405.1/SM5210B
COD = 0.78 g O2/g EPA 410.4/SM5220D
TOXICITY
The aquatic toxicity of NAAC has been determined in accordance with EPA Method 40 Code of Federal Regulations (CFR) Part 797.1300 and 797.1400 using test species required by regulatory agencies for permitted discharges. The LC50 concentration is the highest concentration at which 50% of the test species survived.
EPA 40 CFR 797.1300 Daphnid Acute Toxicity Test
Daphnia magna, static system
48-hour LC50 = 2400 mg/l
EPA 40 CFR 797.1400 Fish Acute Toxicity Test
Pimephales promelas, static system
24-hour LC50 = 2750 mg/l
The University of Utah has reported the following values for anhydrous grade sodium acetate.
LD50 (oral-rat) 3530 mg/kg
LD50 (SCU-mouse) 8000 mg/kg
LD50 (IV-mouse) 335 mg/kg
