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Product Name: Metam sodium
Synonyms: basamid-fluid;bay5590;carbamicacid,n-methyldithio,sodiumsalt;Carbamicacid,N-methyldithio-,sodiumsalt;carbathion;carbathione;carbation;geort
CAS: 137-42-8
MF: C2H4NNaS2
MW: 129.18
EINECS: 205-293-0
Product Categories: Alpha sort;H-MAlphabetic;M;META - METH;Pesticides&Metabolites
Mol File: 137-42-8.mol
Metam sodium Structure
Metam sodium Chemical Properties
Boiling point  110°C
vapor pressure  6 x 10-4 Pa (25 °C; free acid)
storage temp.  APPROX -18°C
form  Liquid
Water Solubility  72.2 g/100 mL at 20 ºC
CAS DataBase Reference 137-42-8(CAS DataBase Reference)
EPA Substance Registry System Sodium methyldithiocarbamate (137-42-8)
Safety Information
Hazard Codes  C;N,N,C
Risk Statements  22-31-34-50/53-43
Safety Statements  26-36/37/39-45-60-61
RIDADR  UN 2811
RTECS  FC2100000
HazardClass  6.1(b)
PackingGroup  III
HS Code  29302000
Hazardous Substances Data 137-42-8(Hazardous Substances Data)
Toxicity LD50 oral in rabbit: 320mg/kg
MSDS Information
Provider Language
Metham sodium English
Metam sodium Usage And Synthesis
Chemical Properties White, crystalline solid. Readily soluble in water; moderately soluble in alcohol; stable in concentrated aqueous solution but decomposes in dilute aqueous solution; unstable in moist soil.
Chemical Properties A yellow to nearly clear yellow-green solution. Also described as a colorless to white crystalline solid. Unpleasant sulfur-amine odor, similar to that of carbon disulfide
Uses Fungicide, nematocide, weed killer, insecticide, soil fumigant.
Uses Metam-sodium is a generator of methyl isothiocyanate. It is a soil sterilant applied prior to planting and controls soil fungi, nematodes, weed seeds and soil dwelling insects