二甲基氯噻吩

Description

chlorthal-dimethyl · CAS 1861-32-1 · C10H6Cl4O4. UNII ZU3X5G2QLR. Melting Point: 155-156 °C; Vapor Pressure: 0.0000025 [mmHg]; Vapor Pressure: 2.5X10-6 mm Hg at 25 °C.

Identification

CAS Registry Number	1861-32-1
PubChem CID	2943
Molecular formula	C10H6Cl4O4
IUPAC name	dimethyl 2,3,5,6-tetrachlorobenzene-1,4-dicarboxylate
UNII (FDA)	ZU3X5G2QLR

Computed Descriptors

Molecular Weight	332.0
XLogP3	4.4
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	4
Exact Mass	331.899069
Monoisotopic Mass	329.902019
Topological Polar Surface Area	52.6
Heavy Atom Count	18
Formal Charge	0

Physical & Chemical Properties

Melting Point	155-156 °C
Vapor Pressure	0.0000025 [mmHg]
Vapor Pressure	2.5X10-6 mm Hg at 25 °C
LogP	log Kow = 4.40 @ 25 °C
LogP	4.28
Other Experimental Properties	DECOMPOSES @ 360-370 °C

Physical description & handling notes

• Colorless solid; [HSDB] Colorless crystalline solid; [MSDSonline]
• CRYSTALS FROM METHANOL
• COLORLESS CRYSTALS
• ESSENTIALLY ODORLESS
• LESS THAN 5% IN WATER; GREATER THAN 5% IN CYCLOHEXANONE, ACETONE, XYLENE
• Solubility (g/kg solvent @ 25 °C): 120 g in dioxan, 250 g in benzene, 170 g in toluene, 140 g in xylene, 100 g in acetone, 70 g in carbon tetrachloride.

Regulatory Status

GHS notification summary	80% (4 / 5)

GHS Hazard Classification

GHS notification summary	80% (4 / 5)
Reported hazard statements	H411 (20%)

Documented Uses

• Used as selective pre-emergence herbicide for control of annual grasses broad-leaved weeds in turf, ornamentals, strawberries, cotton, soybeans, and field beans; [HSDB]
• /IT IS/ PRESENTLY APPROVED FOR USE ON TURF, ORNAMENTALS, STRAWBERRIES, AND AGRONOMIC CROPS INCLUDING COTTON, SOYBEANS, AND FIELD BEANS. /IT IS/ EFFECTIVE AGAINST SMOOTH & HAIRY CRABGRASS, WITCHGRASS, GREEN & YELLOW FOXTAILS, FALL PANICUM & OTHER ANNUAL GRASSES. /IT IS/ ALSO USEFUL AGAINST CERTAIN BROAD-LEAVED WEEDS SUCH AS CARPET WEED...PURSLANE & COMMON CHICKWEED. /IT IS/ TOLERATED BY MANY CROP PLANTS.
• IT IS EXTRAORDINARILY TOXIC TO DODDER AND HAS, THEREFORE, BEEN USED FOR DODDER CONTROL IN SEED ALFALFA.
• Selective non-systemic herbicide used for pre-emergence control of annual grasses and some annual broad-leaved weeds.
• BY ESTERIFICATION WITH METHYL ALCOHOL OF TETRACHLOROTEREPHTHALIC ACID.
• THE ESTER IS PRODUCED BY THE CHLORINATION OF TEREPHTHALOYL CHLORIDE...& REACTION WITH METHANOL.

Synonyms

Chlorthal-dimethyl; dacthal; 1861-32-1; Dacthalor; Tetral; Fatal; Tetrachloroterephthalic acid dimethyl ester; DAC 4; Chlorthal dimethyl ester; Daktal; Dimethyl 2,3,5,6-tetrachlorobenzene-1,4-dicarboxylate; DTXSID0024000; 2,3,5,6-Tetrachloroterephthalic acid dimethyl ester; DAC 893; ZU3X5G2QLR; Terephthalic acid, tetrachloro-, dimethyl ester

Frequently Asked Questions

What are the CAS number and molecular formula of chlorthal-dimethyl?

CAS 1861-32-1; molecular formula C10H6Cl4O4; molecular weight — g/mol.

What other names is chlorthal-dimethyl known by?

Chlorthal-dimethyl, dacthal, 1861-32-1, Dacthalor, Tetral, Fatal.

Is chlorthal-dimethyl classified as hazardous?

80% of GHS notifications report no hazard classification (4 of 5).

What are the key physical properties of chlorthal-dimethyl?

Melting Point: 155-156 °C; Vapor Pressure: 0.0000025 [mmHg]; Vapor Pressure: 2.5X10-6 mm Hg at 25 °C; LogP: log Kow = 4.40 @ 25 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.