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MSDS  : Phosphorothioic acid, O,O-diethyl O-(2,5-dichloro-4-(methylthio)phenyl) ester
CAS  : 21923-23-9
SYNONYMS  : * Celamerck S-2957 * CELA S-2957 * Celathion * Chlorthiophos I * CM S 2957 * O-(Dichloro(methylthio)phenyl) O,O-diethyl phosphorothioate (3 isomers) * O,O-Diethyl-O-2,4,5-dichloro-(methylthio)phenyl thionophosphate * ENT 27635 * NSC 195164 * OMS 1342 * Phosphorothioic acid, O-(2,5-dichloro-4-(methylthio)phenyl) O,O-diethyl ester * S 2957
*** CHEMICAL IDENTIFICATION ***

RTECS NUMBER : TF1590000
CHEMICAL NAME : Phosphorothioic acid, O,O-diethyl
O-(2,5-dichloro-4-(methylthio)phenyl) ester
CAS REGISTRY NUMBER : 21923-23-9
OTHER CAS REGISTRY NOS. : 51052-59-6
BEILSTEIN REFERENCE NO. : 2003497
LAST UPDATED : 199612
DATA ITEMS CITED : 8
MOLECULAR FORMULA : C11-H15-Cl2-O3-P-S2
MOLECULAR WEIGHT : 361.25
WISWESSER LINE NOTATION : 2OPS&O2&OR BG EG DS1
COMPOUND DESCRIPTOR : Agricultural Chemical
SYNONYMS/TRADE NAMES :
* Celamerck S-2957
* CELA S-2957
* Celathion
* Chlorthiophos I
* CM S 2957
* O-(Dichloro(methylthio)phenyl) O,O-diethyl phosphorothioate (3 isomers)
* O,O-Diethyl-O-2,4,5-dichloro-(methylthio)phenyl thionophosphate
* ENT 27635
* NSC 195164
* OMS 1342
* Phosphorothioic acid, O-(2,5-dichloro-4-(methylthio)phenyl) O,O-diethyl
ester
* S 2957

*** HEALTH HAZARD DATA ***

** ACUTE TOXICITY DATA **

TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 13 mg/kg
TOXIC EFFECTS :
Sense Organs and Special Senses (Eye) - effect, not otherwise specified
Behavioral - convulsions or effect on seizure threshold
Lungs, Thorax, or Respiration - dyspnea
REFERENCE :
AHRTAN Arhiv za Higijenu Rada i Toksikologiju. Archives of Industrial
Hygiene and Toxicology. (Jugoslovenska Knjiga, POB 36, YU-11001 Belgrade,
Yugoslavia) V.7- 1956- Volume(issue)/page/year: 27,3,1976

TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Administration onto the skin
SPECIES OBSERVED : Rodent - rat
DOSE/DURATION : 58 mg/kg
TOXIC EFFECTS :
Biochemical - Enzyme inhibition, induction, or change in blood or tissue
levels - reactivates cholinesterase
REFERENCE :
AHRTAN Arhiv za Higijenu Rada i Toksikologiju. Archives of Industrial
Hygiene and Toxicology. (Jugoslovenska Knjiga, POB 36, YU-11001 Belgrade,
Yugoslavia) V.7- 1956- Volume(issue)/page/year: 27,3,1976

TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - mouse
DOSE/DURATION : 141 mg/kg
TOXIC EFFECTS :
Biochemical - Enzyme inhibition, induction, or change in blood or tissue
levels - reactivates cholinesterase
REFERENCE :
AHRTAN Arhiv za Higijenu Rada i Toksikologiju. Archives of Industrial
Hygiene and Toxicology. (Jugoslovenska Knjiga, POB 36, YU-11001 Belgrade,
Yugoslavia) V.7- 1956- Volume(issue)/page/year: 27,3,1976

TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - rabbit
DOSE/DURATION : 20 mg/kg
TOXIC EFFECTS :
Biochemical - Enzyme inhibition, induction, or change in blood or tissue
levels - reactivates cholinesterase
REFERENCE :
AHRTAN Arhiv za Higijenu Rada i Toksikologiju. Archives of Industrial
Hygiene and Toxicology. (Jugoslovenska Knjiga, POB 36, YU-11001 Belgrade,
Yugoslavia) V.7- 1956- Volume(issue)/page/year: 27,3,1976

TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Administration onto the skin
SPECIES OBSERVED : Rodent - rabbit
DOSE/DURATION : 31 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
DEVEAA Defense des Vegetaux. (Federation Nationale des Groupements de
Protection des Cultures, 149, rue de Bercy, 75595 Paris Cedex, 12, France)
V.1- 1947- Volume(issue)/page/year: 36,31,1982

TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Rodent - guinea pig
DOSE/DURATION : 58 mg/kg
TOXIC EFFECTS :
Biochemical - Enzyme inhibition, induction, or change in blood or tissue
levels - reactivates cholinesterase
REFERENCE :
AHRTAN Arhiv za Higijenu Rada i Toksikologiju. Archives of Industrial
Hygiene and Toxicology. (Jugoslovenska Knjiga, POB 36, YU-11001 Belgrade,
Yugoslavia) V.7- 1956- Volume(issue)/page/year: 27,3,1976

TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Bird - chicken
DOSE/DURATION : 45 mg/kg
TOXIC EFFECTS :
Behavioral - ataxia
Behavioral - food intake (animal)
REFERENCE :
AHRTAN Arhiv za Higijenu Rada i Toksikologiju. Archives of Industrial
Hygiene and Toxicology. (Jugoslovenska Knjiga, POB 36, YU-11001 Belgrade,
Yugoslavia) V.7- 1956- Volume(issue)/page/year: 27,3,1976

TYPE OF TEST : LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE : Oral
SPECIES OBSERVED : Bird - quail
DOSE/DURATION : 45 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
AHRTAN Arhiv za Higijenu Rada i Toksikologiju. Archives of Industrial
Hygiene and Toxicology. (Jugoslovenska Knjiga, POB 36, YU-11001 Belgrade,
Yugoslavia) V.7- 1956- Volume(issue)/page/year: 27,3,1976

*** END OF RECORD ***
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NAMECAS
Phosphorothioic acid, S-2,6-diaminohexyl ester,dihydrate, (L)- 78219-01-9
Phosphorothioic acid, S-2,3-diaminopropyl ester 78219-00-8
Phosphorothioic acid, S-(1,2-dibutoxycarbonyl)ethylO,O-dimethyl ester 3700-98-9
Phosphorothioic acid, S-(2-(dibutylamino)-2-oxoethyl)O,O-diethyl ester 35841-68-0
Phosphorothioic acid, dibutyl ester, potassium salt 33908-73-5
Phosphorothioic acid, O,O-dibutylS-((4-hydroxy-3-methyl-2,6-diphenyl-4-piperidinyl)ethynyl) ester, (2-alpha,3-beta,4-alpha,6-alpha)- 72973-03-6
Phosphorothioic acid, O,O-dibutylS-((4-hydroxy-3-methyl-2,6-diphenyl-4-piperidinyl)ethynyl) ester, (2-alpha,3-beta,4-beta,6-alpha)- 72973-06-9
Phosphorothioic acid, O,O-dibutylS-(2-(methylamino)-2-oxoethyl) ester 35841-71-5
Phosphorodithioic acid, O,O-diisopropyl ester,S-ester with 6-chloro-2-(mercaptomethyl)-5-methyl-3(2H)-pyridazinone 51356-22-0
Phosphorothioic acid, O-(2,5-dichloro-4-iodophenyl)O,O-diethyl ester 7533-79-1
Phosphorothioic acid, O-(2,5-dichloro-4-iodophenyl)O,O-dimethyl ester 18181-70-9
Phosphorothioic acid, O-(dichloro(methylthio)phenyl)O,O-diethyl ester 60238-56-4
Phosphorothioic acid, O-(2,4-dichloro-5-nitrophenyl)O,O-diethyl ester 84197-36-4
Phosphorothioic acid, O-(2,5-dichloro-4-nitrophenyl)O,O-dimethyl ester 84197-36-4
Phosphorothioic acid, O-(3,5-dichloro-4-nitrophenyl)O,O-dimethyl ester 50590-01-7
Phosphorothioic acid,O-(6-(2,6-dichlorophenoxy)-3-pyridazinyl) O,O-diethylester 53605-17-7
Phosphorothioic acid,O-(2,4-dichlorophenyl)-O,O-diethyl ester 97-17-6
Phosphorothioic acid, O-(2,4-dichlorophenyl) O-ethylester, potassium salt 97-17-6
Phosphorothioic acid, O-(2,4-dichlorophenyl) O-ethylS-methyl ester 6856-18-4
Phosphorodithioic acid, O,O-diisopropyl ester,S-ester with6-chloro-2-(mercaptomethyl)-3(2H)-pyridazinone 51356-17-3
Phosphorothioic acid, O-(2,4-dichlorophenyl) O-ethylS-propyl ester 38527-91-2
Phosphorothioic acid, S-((2,6-dichlorophenyl)methyl)O,O-diethyl ester 38527-91-2
Phosphorothioic acid,S-(((2,5-dichlorophenyl)thio)methyl) O,O-diethylester 14734-96-4
Phosphorothioic acid,S-(((2,5-dichlorophenyl)thio)-methyl) O,O-dimethylester 17578-36-8
Phosphorothioic acid, O-(2,6-dichloro-p-tolyl)O,O-dimethyl ester 57018-04-9
Phosphorothioic acid, S-1,2-dichlorovinyl O,O-diethylester 1885-91-2
Phosphorothioic acid, S-2,2-dichlorovinyl O,O-diethylester 1885-95-6
Phosphorothioic acid, O-2,2-dichlorovinylO,O-dimethyl ester 36560-17-5
Phosphorothioic acid,S-(((diethoxyphosphinothioyl)thio)methyl) O,O-diethylester 17356-42-2
Phosphorothioic acid, S-(2-diethylaminoethyl)O,O-cyclic trimethylene ester 58607-59-3
Phosphorodithioic acid, O,O-diethylS-(2-(methylamino)-2-oxoethyl) ester 2605-70-1
Phosphorodithioic acid, O,O-diisopropyl ester,S-ester with N-(2-mercaptoethyl) benzenesulfonamide 741-58-2
Phosphorothioic acid, S-(2-(diethylamino)ethyl)O,O-diethyl ester 78-53-5
Phosphorothioic acid, S-(2-(diethylamino)ethyl)O,O-diethyl ester, oxalate (1:1) 3734-97-2
Phosphorothioic acid,O-(2-(diethylamino)-6-methyl-4-pyrimidinyl)O,O-dimethyl ester 29232-93-7
Phosphorothioic acid, O,O-diethylO-(4-(1-((((butylamino)carbonyl)oxy)imino)ethyl)phenyl) ester 22936-20-5
Phosphorothioic acid, O,O-diethylS-(1-(1,3-dicarbethoxy)ethyl) ester 2667-33-6
Phosphorothioic acid, O,O-diethylO-(2,5-dichloro-4-(methylthio)phenyl) ester 21923-23-9
Phosphorothioic acid, O,O-diethylO-(4-((((((2-(diethylamino)ethyl)amino)carbonyl)oxy)imino) methyl)phenyl) ester 22941-86-2
Phosphorothioic acid, O,O-diethylO-(2-(diethylamino)-6-methyl-4-pyrimidinyl) ester 23505-41-1
Phosphorothioic acid, O,O-diethylS-(2-(diethylamino)-2-oxoethyl) ester 35841-65-7
Phosphorothioic acid, O,O-diethylS-(O,O-diethylphosphoramido)ethyl ester 23497-20-3
Phosphorodithioic acid, O,O-diisopropyl ester,S-ester with2-(mercaptomethyl)-6-methyl-3(2H)-pyridazinone 51356-10-6
Phosphorothioic acid, O,O-diethylS-diethylsulfonioethyl ester 51356-10-6
Phosphorothioic acid, O,O-diethylO-(4-(1-((((dimethylamino)carbonyl)oxy)imino)ethyl)phenyl) ester 22942-43-4
Phosphorothioic acid, O,O-diethylO-(4-(((((dimethylamino)carbonyl)oxy)imino)methyl)phenyl) ester 22942-23-0
Phosphorothioic acid, O,O-diethylS-(2-dimethylaminoethyl) ester 3147-20-4
Phosphorothioic acid, O,O-diethylO-(3-(dimethylamino)-4-nitrophenyl) ester 2799-95-3
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