Ecological Assessment of Storm Impacts

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Data Collection

MSMA

CAS Number: 2163-80-6

Basic Information

The chemical structure of MSMA Synonym(s): Ansar; Ansar 170; Ansar 529; Ansar 6.6; Arsanote; Arsonate; Bueno; Bueno 6; Clean Crop MSMA 6.6; Clean Crop MSMA 6 Plus; Daconate 6; Dal-E-Rad; Deconate; Monosodium Acid Methanearsonate
Formula: CH4AsNaO3
 Molecular Weight: 161.95
 Boiling Point (°C): 113 - 116
 Contaminant Type: MSMA is an herbicide.
Notes: Off-white powder

Solubility (in water)

  • Solubility: 104 g/100ml g
    Temperature (°C): 25

Toxicity Effects

  • Organism Type: Crustaceans e
    Common Name: Red-swamp crayfish
     Scientific Name: Procambarus clarkii
     Toxicity: 101-1019 mg/l
     Test: 4d LC50
  • Organism Type: Fish e
    Common Name: Bluegill
     Scientific Name: Lepomis macrochirus
     Toxicity: >1000 mg/l
     Test: 48h LC50
  • Organism Type: Fish g
    Common Name: Bluegill
     Scientific Name: Lepomis macrochirus
     Toxicity: >100 mg/l
     Test: 96h LC50
  • Organism Type: Fish g
    Common Name: Rainbow trout
     Scientific Name: Oncorhynchus mykiss
    Toxicity: >100 mg/l
     Test: 96h LC50
  • Organism Type: Mammals c
    Common Name: Rat
     Scientific Name: Muridae (Family)
     Toxicity: 1700 mg/kg
     Test: LD50
     Formulation: MSMA 6.6
  • Organism Type: Mammals g
    Common Name: Rat
     Scientific Name: Muridae (Family)
     Toxicity: 2270 mg/kg
     Test: LD50
     Formulation: Bueno 6
  • Organism Type: Mammals g
    Common Name: Rat
     Scientific Name: Muridae (Family)
     Toxicity: 2833 mg/kg
     Test: LD50
  • Organism Type: Molluscs b
    Common Name: Molluscs
     Toxicity: 160 mg/l
     Test: EC50

Octanol-Water Partition Coefficients

  • Log Kow: -4.14 p

Resource Map: Click below to open in a new window to view or print.
Potential applications of this contaminant in the St. Johns Water River Management District

Work Cited

b AQUIRE (AQUatic toxicity Information REtrieval) database (As part of the ECOTOX Database). Pages retreived February, 2003 from http://www.epa.gov/ecotox/. USEPA, Washington, DC.
c C&P Press. 2002. EPR Professional Annual CD. Crop Protection Reference. Chemical and Pharmacuetical Press, Inc., New York, NY.
e Verschueren, K. 1996. Handbook of Environmental Data on Organic Chemicals, 3rd edition. John Wiley & Sons, Inc., New York.
g Meister, R. T., and C. Sine (Ed). 2003. Crop Protection Handbook, volume 89. Meister Publishing Company, Willoughby, OH.
p Syracuse Research Corporation Databases. Pages retrieved November, 2003 from: http://esc.syrres.com. Syracuse Research Corporation, North Syracuse, NY.