101-27-9 Usage
Chemical Properties
Different sources of media describe the Chemical Properties of 101-27-9 differently. You can refer to the following data:
1. Crystalline solid; melts at 75°C (167°F);insoluble in water [11 mg/L at 25°C (77°F)];slightly soluble in hexane; soluble in benzeneand chlorinated hydrocarbons.
2. Whitecrystallinesolid;meltsat75°C(167°F);insoluble in water, dissolves in benzene,toluene, and ethylene dichloride; hydrolyzedby acids and alkalies; alkaline hydrolysis liberates terminal chlorine atom.
Uses
Different sources of media describe the Uses of 101-27-9 differently. You can refer to the following data:
1. Barban is used as a selective herbicide forwild oats.
2. Selective herbicide for wild oats.
Definition
ChEBI: A carbamate ester that is 4-chlorobut-2-yn-1-yl ester of N-(3-chlorophenyl)carbamic acid. A herbicide, it is no longer approved for use within the European Community.
General Description
Crystalline solid. Water solubility is 11 ppm at 20°C. Used as a selective herbicide.
Air & Water Reactions
Hydrolyzed by strong acid or base.
Reactivity Profile
BARBAN is a carbamate ester. Carbamates are chemically similar to, but more reactive than amides. Like amides they form polymers such as polyurethane resins. Carbamates are incompatible with strong acids and bases, and especially incompatible with strong reducing agents such as hydrides. Flammable gaseous hydrogen is produced by the combination of active metals or nitrides with carbamates. Strongly oxidizing acids, peroxides, and hydroperoxides are incompatible with carbamates.
Health Hazard
Moderately toxic by ingestion and inhalation;absorption through skin may be very slowand, therefore, almost nontoxic by dermalroute; used as a herbicide, rather than as apesticide; toxic symptoms are those of othercarbamate esters;LD50 oral (rat): 600 mg/kgLD50 skin (rabbit): >20,000 mg/kg.
Check Digit Verification of cas no
The CAS Registry Mumber 101-27-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,0 and 1 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 101-27:
(5*1)+(4*0)+(3*1)+(2*2)+(1*7)=19
19 % 10 = 9
So 101-27-9 is a valid CAS Registry Number.
InChI:InChI=1/C11H9Cl2NO2/c12-6-1-2-7-16-11(15)14-10-5-3-4-9(13)8-10/h3-5,8H,6-7H2,(H,14,15)
101-27-9Relevant articles and documents
Triazolecarboxamide herbicides
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, (2008/06/13)
Compounds of the formula: STR1 wherein X is O or S; R and R1 are substituted or unsubstituted alkyl, alkenyl, alkynyl or cycloalkyl or R and R1 may be joined to form a heterocyclic ring; R2 is substituted or unsubstituted cycloalkyl; and n is 0, 1 or 2 are disclosed as well as their postemergence and preemergence selective herbicide use against both monocot and dicot weeds in crops such as sugarbeets, cotton, soybeans and rice.
Cinetique de la Dechloration du Barbane en Milieu Alcalin
Bergon, M.,Bonafos, M.,Calmon, J. P.
, p. 1237 - 1240 (2007/10/02)
4-Chloro-2-butynyl N-(3-chlorophenyl) carbamate (Barban) is an herbicide whose alkaline hydrolysis leads to the release of the chlorine atom of the ester group.The dechlorination kinetics were investigated in alkaline media at 25 deg C and followed spectrophotometrically or colorimetrically.The rate law of this reaction is complex and shows that the substrate as well as its anion are the reactive species.The pKa value determined spectrophotometrically was 13.50.
