DCPA
Title: DCPA
CAS Registry Number: 1861-32-1
CAS Name: 2,3,5,6-Tetrachloro-1,4-benzenedicarboxylic acid dimethyl ester
Additional Names: 2,3,5,6-tetrachloroterephthalic acid dimethyl ester; dimethyl 2,3,5,6-tetrachloroterephthalate; chlorthal-methyl
Trademarks: Dacthal; Rid
Molecular Formula: C10H6Cl4O4
Molecular Weight: 331.96
Percent Composition: C 36.18%, H 1.82%, Cl 42.72%, O 19.28%
Literature References: Prepn: Lindemann, US 2923634 (1960 to Diamond Alkali). Toxicity data: G. W. Bailey, J. L. White, Residue Rev. 10, 97 (1965).
Properties: Crystals from methanol, mp 155-156°. Solubility: <5% in water; >5% in acetone, cyclohexanone, xylene. LD50 orally in rats: >3000 mg/kg (Bailey, White).
Melting point: mp 155-156°
Toxicity data: LD50 orally in rats: >3000 mg/kg (Bailey, White)
Use: Pre-emergent herbicide.

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