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101-27-9

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Basic Information
CAS No.: 101-27-9
Name: BARBAN
Molecular Structure:
Molecular Structure of 101-27-9 (BARBAN)
Formula: C11H9 Cl2 N O2
Molecular Weight: 258.104
Synonyms: Carbamicacid, (3-chlorophenyl)-, 4-chloro-2-butynyl ester (9CI); Carbanilic acid,m-chloro-, 4-chloro-2-butynyl ester (6CI,8CI); 4-Chloro-2-butyn-1-ylN-(3-chlorophenyl)carbamate; 4-Chloro-2-butynyl 3-chlorocarbanilate;4-Chloro-2-butynyl N-(3-chlorophenyl)carbamate; 4-Chloro-2-butynylm-chlorocarbanilate; 4-[N-(3-Chlorophenyl)carbamoyloxy]-1-chloro-2-butyne; A980; A 980 (herbicide); Barban; Barbane; CBN; Carbyne; Carbyne (herbicide); NSC29168; S 847
EINECS: 202-930-4
Density: 1.394 g/cm3
Melting Point: 75-76oC
Boiling Point: 340.8 °C at 760 mmHg
Flash Point: 159.9 °C
Solubility: Micro dissolve in water, hexane, soluble in benzene
Hazard Symbols: HarmfulXnDangerousN
Risk Codes: 22-43-50/53
Safety: 24-36/37-60-61
Transport Information: UN3077 9/PG 3
PSA: 38.33000
LogP: 3.20370
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Chemistry

The IUPAC name of Barban (CAS NO.101-27-9):: 4-Chlorobut-2-ynyl N-(3-chlorophenyl)carbamate 
Synonyms: (3-Chlorophenyl)carbamic acid 4-chloro-2-butynyl ester ; (4-Chloor-but-2-yn-yl)-N-(3-chloor-fenyl)-carbamaat ; (4-Chloor-but-2-yn-yl)-N-(3-chloor-fenyl)-carbamaat [Dutch] ; (4-Chlor-but-2-in-yl)-N-(3-chlor-phenyl)-carbamat ; (4-Chlor-but-2-in-yl)-N-(3-chlor-phenyl)-carbamat [German] ; (4-Cloro-but-2-in-il)-N-(3-cloro-fenil)-carbammato ; (4-Cloro-but-2-in-il)-N-(3-cloro-fenil)-carbammato [Italian] ; 2-Butyn-1-ol, 4-chloro-, m-chlorocarbanilate ; 2-Butynyl 4-chloro-m-chlorocarbanilate ; 2-Butynyl-4-chloro-m-chlorocarbanilate ; 4-Chloro-2-butynyl 3-chlorocarbanilate ; 4-Chloro-2-butynyl N-(3-chlorophenyl)carbamate ; 4-Chloro-2-butynyl m-chlorocarbanilate ; 4-Chloro-2-butynyl m-chlorophenylcarbamate (8CI) ; 4-Chloro-2-butynyl meta-chlorocarbanilate ; 4-Chloro-2-butynylm-chlorocarbanilate ; 4-Chlorobut-2-ynyl 3-chlorophenylcarbamate ; 4-Chlorobut-2-ynyl-m-chlorocarbanilate ; Barbamate ; Barban ; Barbane ; Barbane [ISO-French] ; Carbin ; Carbine ; Carbyne ; Carbyne (herbicide) ; Chlorinat ; Chloro-2-butynyl m-chlorocarbamate ; Karbin ; N-(3-Chloro phenyl) carbamate de 4-chloro 2 butynyle ; N-(3-Chloro phenyl) carbamate de 4-chloro 2 butynyle 
CAS: 101-27-9 
EINECS: 202-930-4 
Molecular Formula: C11H9Cl2NO2
Formula Weight: 258.1 g/mol
Molecular Structure:

Index of Refraction: 1.607 
Density: 1.394 g/cm3 
Flash Point: 159.9 °C 
Boiling Point: 340.8 °C at 760 mmHg 
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.

Toxicity Data With Reference

The toxicity of Barban (CAS NO.101-27-9):

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
guinea pig LD50 oral 240mg/kg (240mg/kg)   Pharmacological Reviews. Vol. 14, Pg. 225, 1962.
mammal (species unspecified) LD50 unreported 240mg/kg (240mg/kg)   "Chemistry of Pesticides," Melnikov, N.N., New York, Springer-Verlag New York, Inc., 1971Vol. -, Pg. 202, 1971.
mouse LD50 oral 322mg/kg (322mg/kg)   Farmakologiya i Toksikologiya Vol. 35, Pg. 356, 1972.
rabbit LD50 oral 600mg/kg (600mg/kg)   Pharmacological Reviews. Vol. 14, Pg. 225, 1962.
rabbit LD50 skin 23000mg/kg (23000mg/kg)   "Wirksubstanzen der Pflanzenschutz und Schadlingsbekampfungsmittel," Perkow, W., Berlin, Verlag Paul Parey, 1971-1976Vol. -, Pg. -, 1971/1976.
rat LC50 inhalation 27400mg/m3/4H (27400mg/m3)   "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986Vol. -, Pg. 952, 1986.
rat LD50 oral 527mg/kg (527mg/kg)   "Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure," Izmerov, N.F., et al., Moscow, Centre of International Projects, GKNT, 1982Vol. -, Pg. 35, 1982.
rat LD50 skin > 1600mg/kg (1600mg/kg)   World Review of Pest Control. Vol. 9, Pg. 119, 1970.
rat LD50 unreported 527mg/kg (527mg/kg)   Environmental Quality and Safety, Supplement. Vol. 3, Pg. 618, 1975.

Consensus Reports

EPA Genetic Toxicology Program.

Safety Profile

The Hazard Codes of Barban (CAS NO.101-27-9):  HarmfulXnDangerousN
Risk Statements: R22:Harmful if swallowed. R43:May cause sensitization by skin contact. R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements: S24:Avoid contact with skin. S36/37:Wear suitable protective clothing and gloves. S60:This material and its container must be disposed of as hazardous waste. S61:Avoid release to the environment. Refer to special instructions / safety data sheets.
RIDADR: UN3077 9/PG 3
RTECS: FD7700000

Poison by ingestion, inhalation, and possibly other routes. Mildly toxic by skin contact. Mutation data reported. An herbicide. See also CARBAMATES and ESTERS. When heated to decomposition it emits very toxic fumes of Cl− and NOx.