Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 2,3-dichloro-5-(dichloromethylidene)cyclopent-2-ene-1,4-dione
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Purity: 98.0%
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18964-31-3

18964-31-3 structure

Name: 2,3-dichloro-5-(dichloromethylidene)cyclopent-2-ene-1,4-dione
Chemical Name: 4,5-dichloro-2-(dichloromethylidene)cyclopent-4-ene-1,3-dione
CAS Number: 18964-31-3
Molecular Formula: C₆Cl₄O₂
Molecular Weight: 245.87500
Create Date: 2017-12-01 18:37:13
Modify Date: 2025-08-28 11:39:36

Name	4,5-dichloro-2-(dichloromethylidene)cyclopent-4-ene-1,3-dione
Synonyms	4,5-Dichlor-2-dichlormethylen-cyclopent-4-en-1,3-dion perchloro-2-methylene-4-cyclopentene-1,3-dione Diketone 2,3-dichloro-5-dichloromethylene-2-cyclopentene-1,4-dione perchloro-5-methylene-2-cyclopentene-1,4-dione 4,5-dichloro-2-dichloromethylene-4-cyclopentene-1,3-dione 4,5-dichloro-2-dichloromethylene-cyclopent-4-ene-1,3-dione

Density	1.8g/cm3
Boiling Point	271.4ºC at 760 mmHg
Molecular Formula	C₆Cl₄O₂
Molecular Weight	245.87500
Flash Point	112.5ºC
Exact Mass	243.86500
PSA	34.14000
LogP	2.51660
Vapour Pressure	0.00648mmHg at 25°C
Index of Refraction	1.595

CHEMICAL IDENTIFICATION

RTECS NUMBER :: GY5976700

CHEMICAL NAME :: 4-Cyclopentene-1,3-dione, 4,5-dichloro-2-(dichloromethylene)-

CAS REGISTRY NUMBER :: 18964-31-3

BEILSTEIN REFERENCE NO. :: 2092813

LAST UPDATED :: 199612

DATA ITEMS CITED :: 6

MOLECULAR FORMULA :: C6-Cl4-O2

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 :: 2300 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 32(3),48,1988

TYPE OF TEST :: LC50 - Lethal concentration, 50 percent kill

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 55 mg/m3

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 32(3),48,1988

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 940 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 32(3),48,1988

TYPE OF TEST :: LC50 - Lethal concentration, 50 percent kill

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 54 mg/m3

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 32(3),48,1988

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - guinea pig

DOSE/DURATION :: 980 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 32(3),48,1988

TYPE OF TEST :: LC50 - Lethal concentration, 50 percent kill

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - guinea pig

DOSE/DURATION :: 53 mg/m3

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: GTPZAB Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1-36, 1957-1992. For publisher information, see MTPEEI Volume(issue)/page/year: 32(3),48,1988

HS Code	2914700090

3424-05-3

18964-31-3

Literature: McBee et al. Journal of the American Chemical Society, 1955 , vol. 77, p. 4379

3424-05-3

7697-37-2

17218-59-6

18964-31-3

Literature: McBee et al. Journal of the American Chemical Society, 1955 , vol. 77, p. 4379

HS Code	2914700090
Summary	HS: 2914700090 halogenated, sulphonated, nitrated or nitrosated derivatives of ketones and quinones, whether or not with other oxygen function Tax rebate rate:9.0% Supervision conditions:none VAT:17.0% MFN tariff:5.5% General tariff:30.0%

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