Endothall

Title: Endothall
CAS Registry Number: 145-73-3
CAS Name: 7-Oxabicyclo[2.2.1]heptane-2,3-dicarboxylic acid
Additional Names: 3,6-endoxohexahydrophthalic acid; endothal
Molecular Formula: C8H10O5
Molecular Weight: 186.16
Percent Composition: C 51.61%, H 5.41%, O 42.97%
Literature References: Prepn: Olin, US 2550494 (1951 to Sharples Chemicals). Of the three possible isomers, the exo-cis form has the greatest biological activity. Fate in the environment and toxicity: Simsiman et al., Residue Rev. 62, 131-174 (1976); T. B. Gaines, R. E. Linder, Fundam. Appl. Toxicol. 7, 299 (1986).
Properties: Solubility of the acid in g/100 g at 20°: water 10; acetone 7; benzene 0.01; methanol 28. Converted to the anhydride at 90°. LD50 in adult male, female rats (mg/kg): 57, 46 orally (Gaines, Linder).
Toxicity data: LD50 in adult male, female rats (mg/kg): 57, 46 orally (Gaines, Linder)
Derivative Type: Dipotassium salt
Trademarks: Aquathol (Elf Atochem); Aquathol K (Elf Atochem)
Molecular Formula: C8H8K2O5
Molecular Weight: 262.34
Percent Composition: C 36.63%, H 3.07%, K 29.81%, O 30.49%
CAUTION: May be very irritating to skin, eyes, mucous membranes. Ingestion may cause severe G.I. inflammation with erosion. See Clinical Toxicology of Commercial Products, R. E. Gosselin et al., Eds. (Williams & Wilkins, Baltimore, 5th ed., 1984) Section II, p 342.
Use: Herbicide; defoliant.
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