Title: Chloramben
CAS Registry Number: 133-90-4
CAS Name: 3-Amino-2,5-dichlorobenzoic acid
Molecular Formula: C7H5Cl2NO2
Molecular Weight: 206.03
Percent Composition: C 40.81%, H 2.45%, Cl 34.42%, N 6.80%, O 15.53%
Literature References: Selective pre-emergence herbicide. Prepn: S. R. McLane et al., US 3014063 (1961 to Amchem). Activity: A. J. Tafuro, Proc. Northeast. Weed Control Conf. 1959, 423. Degradn in soil: R. E. Wildung et al., Weed Res. 8, 213 (1968). Carcinogenicity study: J. F. Robens, Vet. Hum. Toxicol. 22, 328 (1980).
Properties: Cryst, mp 200-201°. Vapor press at 100°: 7 ´ 10-3 mm Hg. Soly in water at 25°: 700 mg/l. Soly in (g/100 ml): acetone 23.3; methanol 22.3; ethanol 17.3; chloroform 0.09; benzene 0.02.
Melting point: mp 200-201°
Derivative Type: Ammonium salt
Manufacturers' Codes: ACPM-629
Trademarks: Amiben (Rhone-Poulenc)
Molecular Formula: C7H8Cl2N2O2
Molecular Weight: 223.06
Percent Composition: C 37.69%, H 3.61%, Cl 31.79%, N 12.56%, O 14.35%
Properties: mp 194-197° (dec). Soly in (g/100 gm) at 25°: water 29.6; ethanol 6.9; isopropanol 1.7. Soly in water at 20°: 120 mg/l.
Melting point: mp 194-197° (dec)
Derivative Type: Methyl ester
Manufacturers' Codes: Amchem 65-81B
Trademarks: Vegiben
Molecular Formula: C8H7Cl2NO2
Molecular Weight: 220.05
Percent Composition: C 43.67%, H 3.21%, Cl 32.22%, N 6.37%, O 14.54%
Properties: mp 63-64°. Soly in water at 20°: 120 mg/l.
Melting point: mp 63-64°
Use: Herbicide.
Status: This monograph has been retired and is no longer subject to revision or update.
Chlorambucil Chloramine-B Chloramine-T Chloraminophenamide Chloramphenicol

CAS number 133-90-4 YesY
PubChem 8630
ChemSpider 8309 N
EC number 205-123-5
KEGG C19056 YesY
Jmol-3D images Image 1
Molecular formula C7H5Cl2NO2
Molar mass 206.03 g mol−1
Appearance Colorless crystalline solid[1]
Melting point 194-197 °C (dec.)[2]
200-201 °C[1]
Solubility in water 700 mg/L[1]
R-phrases R45 R36/37/38[2]
S-phrases S53 S22 S26 S36/37/39 S45[2]
LD50 3500 mg/kg (rat)[1]
3725 mg/kg (mouse)[1]
 N (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Chloramben is a selective herbicide used to control the seedlings of broadleaf weeds and annual grasses. It is mostly used for soybeans, but also for dry beans, peanuts, sunflowers, peppers, cotton, sweet potatoes, squash, hardwood trees, shrubs, and some conifers.[1]

Chloramben is considered practically nontoxic.[1]