2,4-二氯苯氧乙酸

Description

2,4-Dichlorophenoxyacetic acid is identified by CAS 94-75-7, molecular formula C8H6Cl2O3 and molecular weight 219.97 g/mol. UNII 2577AQ9262; ChEBI 28854; InChIKey OVSKIKFHRZPJSS-UHFFFAOYSA-N. Boiling Point: BP: 160 °C at 4 mm Hg; Melting Point: 280 °F (NTP, 1992); Melting Point: 138 °C.

Identification

CAS Registry Number	94-75-7
PubChem CID	1486
Molecular formula	C8H6Cl2O3
Molecular weight	219.97 g/mol
IUPAC name	2-(2,4-dichlorophenoxy)acetic acid
InChIKey	OVSKIKFHRZPJSS-UHFFFAOYSA-N
UNII (FDA)	2577AQ9262
ChEBI ID	CHEBI:28854

Computed Descriptors

Molecular Weight	221.03
XLogP3	2.8
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	3
Rotatable Bond Count	3
Exact Mass	219.9693994
Monoisotopic Mass	219.9693994
Topological Polar Surface Area	46.5
Heavy Atom Count	13
Formal Charge	0

Physical & Chemical Properties

Boiling Point	BP: 160 °C at 4 mm Hg
Melting Point	280 °F (NTP, 1992)
Melting Point	138 °C
Melting Point	140.5 °C
Melting Point	140 °C
Melting Point	280 °F
Solubility	In water, 677 ppm at 25 °C
Solubility	In water, 540 ppm at 20 °C
Solubility	0.677 mg/mL at 25 °C
Solubility	0.05%

Physical description & handling notes

• 2,4-dichlorophenoxyacetic acid is an odorless white to tan solid. Sinks in water. (USCG, 1999)
• Dry Powder; Liquid
• White to yellow, crystalline, odorless powder. [herbicide]; [NIOSH] White solid; Primary formulations are as amine salt in aqueous solution and as ester in emulsifiable concentrate; [Reference #2]
• Solid
• COLOURLESS CRYSTALS OR WHITE POWDER.
• White to yellow, crystalline, odorless powder.

GHS Hazard Classification

Reported hazard statements	H302, H317, H318, H335, H412, H312 (14.6%), H334 (14.6%), H400 (26.1%)

Documented Uses

• Used post-emergence for selective control of broadleaf weeds. ... registered for use on a variety of food/feed sites including field, fruit and vegetable crops. ... also registered for use on turf, lawns, rights-of-way, aquatic sites, forestry applications ... used as a plant growth regulator in citrus.
• 2,4-D, its salts & esters are systemic herbicides, widely used for weed control in cereals and other crops
• For more Uses (Complete) data for 2,4-D (7 total), please visit the HSDB record page.
• 2,4-D is is an agrochemical - a substance that is used in agriculture or horticulture. It is a broadleaf herbicide, which when sprayed or dusted on plants causes its leaves to fall off, and functions as a synthetic auxin. 2,4-D is commonly found in lawn care products; wheat, corn, and other grass family herbicides; forestry products; treatments for roadside weeds; and aquatic weed control products.
• Transformation products, Herbicides, Plant growth regulators
• Information on 38 consumer products that contain 2,4-Dichlorophenoxyacetic acid (2,4-D) in the following categories is provided:

Synonyms

2,4-dichlorophenoxyacetic acid; 94-75-7; 2-(2,4-dichlorophenoxy)acetic acid; 2,4-D; (2,4-Dichlorophenoxy)acetic acid; Dicopur; B-Selektonon; Fernimine; Netagrone; Amoxone; Ipaner; Pielik; Rhodia; Chloroxone; Vergemaster; Agrotect

Frequently Asked Questions

What are the CAS number and molecular formula of 2,4-Dichlorophenoxyacetic acid?

CAS 94-75-7; molecular formula C8H6Cl2O3; molecular weight 219.97 g/mol.

What other names is 2,4-Dichlorophenoxyacetic acid known by?

2,4-dichlorophenoxyacetic acid, 94-75-7, 2-(2,4-dichlorophenoxy)acetic acid, 2,4-D, (2,4-Dichlorophenoxy)acetic acid, Dicopur.

Is 2,4-Dichlorophenoxyacetic acid classified as hazardous?

Hazard statements reported: H302, H317, H318, H335, H412.

What are the key physical properties of 2,4-Dichlorophenoxyacetic acid?

Boiling Point: BP: 160 °C at 4 mm Hg; Melting Point: 280 °F (NTP, 1992); Melting Point: 138 °C; Melting Point: 140.5 °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.