13-03401. Disul-sodium [Archived]

Nomenclature

CAS number: 136-78-7
2-(2,4-Dichlorophenoxy)ethanol hydrogen sulfate sodium salt; sodium 2,4-dichlorophenoxyethyl sulfate; 2,4-dichlorophenoxyethyl hydrogen sulfate sodium salt; 2,4-DES-Na; SES; sesone; Crag Herbicide-1 (Union Carbide); Crag Sesone (Union Carbide).
C8H7Cl2NaO5S; mol wt 309.10.
C 31.09%, H 2.28%, Cl 22.94%, Na 7.44%, O 25.88%, S 10.37%.

Description and references

Prepn: J. A. Lambrech, US 2573769 (1951 to Union Carbide). Toxicity study: G. W. Bailey, J. L. White, Residue Rev. 10, 97 (1965).

Chemical structure

Properties

Crystals, mp 245° (dec). Soly in water (25°): 25.5%. Insol in most organic solvents except methanol. LD50 orally in rats: 730 mg/kg (Bailey, White).

Caution

Potential symptoms of overexposure are irritation of eyes and skin; liver and kidney damage. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 78.

Use

Herbicide.

Status

This monograph has been retired and is no longer subject to revision or update.