2006 Acute Toxicity of Monothanolamine, Diethanolamine, Diethylene Glycol and Triethylene Glycol to Rainbow Trout, Daphnia Magna and Hyalella Azteca

Vizon SciTec Inc. – Toxicology Group

The acute toxicity of monoethanolamine (MEA), diethanolamine (DEA), diethylene glycol (DEG), and triethylene glycol (TEG) were selectively tested using the following test methods and species:

Amines

Glycols

MEA

DEA

DEG

TEG

Acute 96-hr Rainbow Trout Survival Test (EPS 1/RM/9)

Acute 48-hr Daphnia magna Survival Test (EPS 1/RM/11)

Acute 96-hr Hyalella azteca Survival Test (EPS 1/RM/33)

The LC50s and 95% confidence limits, based on nominal concentrations, were as follows:

Amines (mg/L)

Glycols (g/L)

MEA

DEA

DEG

TEG

96-hr Rainbow Trout

105 (85, 145)

460 (250, 625)

66 (50, 100)

N/A

48-hr Daphnia magna

66.7 (60.1-74.1)

N/A

62.63 (57.63-68.07)

N/A

96-hr Hyalella azteca

170 (163-177)

344 (312-377)

65.98 (61.69-70.56)

43.5 (39.4, 48.1)

The measured concentrations at test initiation and completion were generally within 20% of nominal concentrations, indicating that the test substance concentrations were satisfactorily maintained during the exposure periods. The ranges of values (%measured/nominal) are presented below:

MEA

DEA

DEG

TEG

96-hr Rainbow Trout

93-101%

96-110%

83-106%

N/A

48-hr Daphnia magna

85-118%

N/A

92-105%

N/A

96-hr Hyalella azteca

79-104%

93-100%

84-91%

83-90%

2006 Vizon_Acute Toxicity of MAGG to Fish