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2,4-Dichlorophenoxyacetic acid

Description References
2,4-Dichlorophenoxyacetic acid
2,4-Dichlorophenoxyacetic acid structure
CAS No.
94-75-7
Chemical Name:
2,4-Dichlorophenoxyacetic acid
Synonyms
For;u46d;GAPL;dma4;CAPRI;DYMEC;KAY-D;2,4-D;RASA4;DMA-4
CBNumber:
CB8762041
Molecular Formula:
C8H6Cl2O3
Formula Weight:
221.04
MOL File:
94-75-7.mol

2,4-Dichlorophenoxyacetic acid Properties

Melting point:
137 °C
Boiling point:
160 °C (0.4 mmHg)
Density 
1.563
vapor pressure 
0.4 mm Hg ( 160 °C)
refractive index 
1.5000 (estimate)
Flash point:
160°C/0.4mm
storage temp. 
APPROX 4°C
solubility 
0.3g/l
form 
crystalline
pka
pK1:2.64 (25°C)
color 
off-white to tan
Water Solubility 
Slightly soluble. Decomposes. 0.0890 g/100 mL
Merck 
14,2796
BRN 
1214242
Exposure limits
NIOSH REL: TWA 10 mg/m3, IDLH 100 mg/m3; OSHA PEL: TWA 10 mg/m3; ACGIH TLV: TWA 10 mg/m3.
Stability:
Stable, but moisture-sensitive and may be light-sensitive. Incompatible with strong oxidizing agents, corrodes many metals. Decomposes in water.
CAS DataBase Reference
94-75-7(CAS DataBase Reference)
NIST Chemistry Reference
(2,4-Dichlorophenoxy)acetic acid(94-75-7)
EPA Substance Registry System
Acetic acid, (2,4-dichlorophenoxy)-(94-75-7)
SAFETY
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  Xn,Xi,T,F
Risk Statements  22-37-41-43-52/53-39/23/24/25-23/24/25-36/37/38-11-36-20/21/22-67-66
Safety Statements  24/25-26-36/37/39-46-61-2-45-36/37-27-16-7-9
RIDADR  UN 3077 9/PG 3
WGK Germany  2
RTECS  AG6825000
TSCA  Yes
HazardClass  6.1
PackingGroup  III
HS Code  29189090
Hazardous Substances Data 94-75-7(Hazardous Substances Data)
Toxicity EC50 (24-hour) for Daphnia magna 249 mg/L, Daphnia pulex 324 mg/L (Lilius et al., 1995); LC50 (48-hour) for bluegill sunfish 0.9 ppm, rainbow trout 1.1 ppm (Verschueren, 1983); acute oral LD50 for rats 375 mg/kg (Hartley and Kidd, 1987)
Symbol(GHS):
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H312 Harmful in contact with skin Acute toxicity,dermal Category 4 Warning P280,P302+P352, P312, P322, P363,P501
H317 May cause an allergic skin reaction Sensitisation, Skin Category 1 Warning P261, P272, P280, P302+P352,P333+P313, P321, P363, P501
H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled Sensitisation, respiratory Category 1 Danger P261, P285, P304+P341, P342+P311,P501
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
H351 Suspected of causing cancer Carcinogenicity Category 2 Warning P201, P202, P281, P308+P313, P405,P501
H361 Suspected of damaging fertility or the unborn child Reproductive toxicity Category 2 Warning P201, P202, P281, P308+P313, P405,P501
H370 Causes damage to organs Specific target organ toxicity, single exposure Category 1 Danger P260, P264, P270, P307+P311, P321,P405, P501
H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, P501
H402 Harmful to aquatic life Hazardous to the aquatic environment, acute hazard Category 3
H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
H412 Harmful to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 3 P273, P501
Precautionary statements:
P201 Obtain special instructions before use.
P202 Do not handle until all safety precautions have been read and understood.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P262 Do not get in eyes, on skin, or on clothing.
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P271 Use only outdoors or in a well-ventilated area.
P272 Contaminated work clothing should not be allowed out of the workplace.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P311 Call a POISON CENTER or doctor/physician.
P391 Collect spillage. Hazardous to the aquatic environment
P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P308+P313 IF exposed or concerned: Get medical advice/attention.
P342+P311 IF experiencing respiratory symptoms: call a POISON CENTER or doctor/physician.
P405 Store locked up.
P403+P233 Store in a well-ventilated place. Keep container tightly closed.
P501 Dispose of contents/container to..…

2,4-Dichlorophenoxyacetic acid price More Price(16)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 31518 2,4-D PESTANAL , analytical standard 94-75-7 250mg $29.1 2018-11-13 Buy
Sigma-Aldrich 76514 2,4-D certified reference material, TraceCERT 94-75-7 100mg $99.9 2018-11-20 Buy
TCI Chemical D0396 2,4-Dichlorophenoxyacetic Acid >97.0%(T) 94-75-7 25g $14 2018-11-22 Buy
TCI Chemical D0396 2,4-Dichlorophenoxyacetic Acid >97.0%(T) 94-75-7 500g $65 2018-11-22 Buy
Alfa Aesar A12467 2,4-Dichlorophenoxyacetic acid, 98% 94-75-7 250g $38.9 2018-11-13 Buy

2,4-Dichlorophenoxyacetic acid Chemical Properties,Uses,Production

Description

As one of the most inexpensive and oldest weed killers, 2,4-Dichlorophenoxyacetic acid (usually called 2,4-D) is a systemic herbicide that is widely applied all over the world. It is effective to selectively kill a variety of terrestrial and aquatic broadleaf weeds without affecting most grasses, such as cereals, lawn turf, and grassland. Nowadays, 2,4-D is widely used to treat unwanted vegetation in various areas. In the field of forestry, it is used for stump treatment, trunk injection, selective control of brush in conifer forests and used to kill weeds and brush along roadways, railways, and power lines which probably damage equipment or interfere with safe operation. Besides, it is applied to control aquatic weeds for the safety of boating, fishing and swimming or protection of hydroelectric equipment. It is also used to control the spread of invasive, noxious and non-native weed species by government and control various poisonous weeds such as poison ivy and poison oak. In addiction to the forestry use, 2,4-D can also be used as a supplement in plant cell culture media in laboratories as a dedifferentiation hormone.

References

https://www.nrdc.org/stories/24-d-most-dangerous-pesticide-youve-never-heard
https://pubchem.ncbi.nlm.nih.gov/compound/1486#section=Top
https://en.wikipedia.org/wiki/2,4-Dichlorophenoxyacetic_acid

Chemical Properties

light yellow crystalline powder

Chemical Properties

2,4-Dichlorophenoxyacetic acid is a white to yellow crystalline powder with a slight phenolic odor.

Uses

2,4-D is a chlorine-substituted phenoxyacetic acid herbicide used for postemergence control of annual and perennial broad-leaved weeds in fruits, vegetables, turfs and ornamentals

Uses

Herbicide. Used to increase latex output of old rubber trees

Uses

2,4-D is one of the most widely used herbicides. Exposure to this chemical may arisein the garden, farm, or plantation setting,where it is sprayed for weed control andto enhance the plant growth. Its residueshave been detected in soils, sediments, andgroundwater, as well as in tissues of corals(Crockett et al. 1986; Glynn et al. 1984).

Definition

ChEBI: A chlorophenoxyacetic acid that is phenoxyacetic acid in which the ring hydrogens at postions 2 and 4 are substituted by chlorines.

General Description

Odorless white to tan solid. Sinks in water.

Air & Water Reactions

Decomposes rapidly in water.

Reactivity Profile

2,4-Dichlorophenoxyacetic acid is incompatible with strong oxidizers. 2,4-Dichlorophenoxyacetic acid is corrosive to metals.

Health Hazard

Dust may irritate eyes. Ingestion causes gastroentric distress, diarrhea, mild central nervous system depression, dysphagia, and possible transient liver and kidney injury.

Health Hazard

The acute toxic symptoms from ingestion,absorption through skin, and inhalation ofits dusts include lethargy, stupor, weakness,incoordination, muscular twitch, nausea, vo-miting, gastritis, convulsions, and coma.Death resulted in animals from ventricularfibrillation. In humans, ingestion of 4–6 gof 2,4-D can cause death. The toxic effectsare nausea, vomiting, somnolence, convul-sions, and coma. The oral LD50 value in testanimals varied at 100–500 mg/kg, depend-ing on species, which included dogs, guineapigs, hamsters, rats, mice, and rabbits.
Gorzinski and co-workers (1987) haveinvestigated acute, pharmacokinetic, andsubchronic toxicity of 2,4-D and its estersand salts in rats and rabbits. The acutedermal LD50 values in rabbits for theacid, esters, and salts were >2000 mg/kg.Urinary elimination of 2,4-D was saturatedin male rats given oral doses of 50 mg/kg.There was a decrease in body weightgain and increase in kidney weightsin animals, resulting from subchronicdietary doses. A dose-related degenerativechange was observed in the proximalrenal tubules. Repeated subcutaneous dosing(150–250 mg/kg) of 2,4-D butyl esterresulted in accumulation of the compoundin the brain, causing neurobehavioral toxicity(Schulze and Dougherty 1988).
Alexander and associates (1985)determined the 48-hour median lethal con-centration values for 2,4-D to aquatic organ-isms. These values are 25, 325, 290, and358 mg/L for Daphnia magna, fathead min-nows, bluegill, and rainbow trout, respec-tively.

Fire Hazard

Special Hazards of Combustion Products: Toxic and irritating hydrogen chloride or phosgene gases may form.

Agricultural Uses

Herbicide, Plant growth regulator: 2,4-Dichlorophenoxyacetic acid was introduced as a plant growth-regulator in 1942. 2, 4-D is the most widely used herbicide in the United States and its used in more than 100 countries. It is registered in the United States as a herbicide for control of broadleaf plants and as a plant growth-regulator. There are many forms or derivatives of 2,4-D including esters, amines, and salts. It is used in cultivated agriculture, in pasture and rangeland applications, forest management, home, garden, and to control aquatic vegetation. It may be found in emulsion form, in aqueous solutions (salts), and as a dry compound. The product Agent Orange, made by Monsanto Chemical and used extensively throughout Vietnam, was about 50% 2,4-D. However, the controversies associated with the use of Agent Orange involved a contaminant (dioxin) in the 2,4,5-T component of the defoliant. In 1964 Agent Orange replaced Agent Purple a mixture of the n-butyl esters of 2,4-D and 2,4,5-T plus the isobutyl ester of 2,4,5-T.

Agricultural Uses

2,4-D is short for 2,4-dichlorophenoxyacetic acid. It is known for its weed-killing properties. There are two types of weedicides, namely, selective and non-selective. 2,4-D is a selective weedicide used for eliminating weeds without causing injury to the crop.

Trade name

ACME® 2,4-D; AGROCER COMPLEX®; AGROTECT®; AMIDOX®; AMINOL 806®; AMINOZ®; AMOXONE®; AQUA-KLEEN®; BARRAGE®; BH 2,4-D®; BRUSH-RHAP®, active;[C]; BUSH KILLER®; B-SELEKTONON®; CAMPAIGN®; CHIPCO TURF HERBICIDE “D”®; CHLOROXONE®; CITRUS FIX; CROP RIDER®[C]; CROTILIN®; CURTAIL®; D 50®; 2,4-D PHENOXY PESTICIDE®; DACAMID®; DACAMINE®[C]; DECAMINE®; DEBROUSSAILLANT 600®; DEDWEED®; DEHERBAN®; DESORMONE® 2,4-D; DICOPUR®; DICOTOX®; DIKAMIN®; DIKONIRT®; DMA-4®; DORMONE®; DYMEC®; EMULSAMINE BK®[C]; EMULSAMINE E-3®[C]; ENVERT®[C]; ESTERON®; ESTERON BRUSH KILLER®; ESTERON 99 CONCENTRATE®; ESTERONE FOUR®, ESTERON 44 WEED KILLER®; ESTONE®; FARMCO®[C]; FERNESTA®; FERNIMINE®; FERNOXONE®; FERXONE®; FOREDEX 75®; FORMULA 40®; HEDONAL®; HERBANIL®; HERBI D-480®; HERBIDAL®; HERBOXONE®; HI-DEP®; HORMOTOX®; IPANER®; KROTILINE®; LAND MASTER®; LAWN-KEEP®; MACRONDRAY®; MALERBANE®; MATON®; MIRACLE®[C]; MONOSAN®; MOTA MASKROS®; MOXONE®; NETAGRONE®; PENNAMINE®[C]; PHENOX®; PIELIK®; PLANOTOX®; PLANTGARD®; RHODIA®; SALVO®[C]; SAVAGE®; SPRITZHORMIN/2,4-D®; SPRITZ-HORMIT/2,4-D®; SUPER D WEEDONE®; SUPERORMONE CONCENTRE®; TRANSAMINE®[C]; TRIBUTON®; TRINOXOL®[C]; U 46® 2,4-D; U-5043®; VERGEMASTER®; VERTON®[C]; VIDON 638®; VISKO®[C]; VISKORHAP®[C]; WEED-AG-BAR®; WEEDAR®; WEEDB-GON®; WEEDEZ WONDER BAR®; WEEDONE®; WEED-RHAP®[C]; WEED TOX®; WEEDTROL®

Potential Exposure

2,4-Dichlorophenoxyacetic acid, was introduced as a plant growth-regulator in 1942. It is registered in the United States as a herbicide for control of broadleaf plants and as a plant growth-regulator. Thus, workers engaged in manufacture, formulation or application are affected, as may be citizens in areas of application. The Vietnam war era defoliant, Agent Orange, was a mixture of 2,4-D and 2,4,5-T.

First aid

If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, includ- ing resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit.

Environmental Fate

Biological. 2,4-D degraded in anaerobic sewage sludge to 4-chlorophenol (Mikesell and Boyd, 1985). In moist nonsterile soils, degradation of 2,4-D occurs via cleavage of the carbon-oxygen bond at the 2-position on the aromatic ring (Foster and McKercher, 1973). In filtered sewage water, 2,4-D underwent complete mineralization but degradation was much slower in oligotrophic water, especially when 2,4-D was present in high concentrations (Rubin et al., 1982). In a primary digester sludge under methanogenic conditions, 2,4-D did not display any anaerobic biodegradation after 60 days (Battersby and Wilson, 1988, 1989)
In clear water and muddy water, hydrolysis half-lives of 18 to 50 days and 10–25 days, respectively, were reported (Nesbitt and Watson, 1980)
Soil. In moist soils, 2,4-D degraded to 2,4-dichlorophenol and 2,4-dichloro-anisole as intermediates followed by complete mineralization to carbon dioxide (Wilson and Cheng, 1978; Stott, 1983; Smith, 1985). 2,4-Dichlorophenol also was reported as
The reported half-lives for 2,4-D in soil ranged from 4 days in a laboratory experiment (McCall et al., 1981a) to 15 days (Jury et al., 1987). Residual activity in soil is limited to approximately 6 weeks (Hartley and Kidd, 1987)
After one application of 2,4-D to soil, the half-life was reported to be approximately 80 days but can be as low as 2 weeks after repeated applications (Cullimore, 1971). The half-lives for 2,4-D in soil incubated in the laboratory under aerobic condition

Shipping

UN3345 Phenoxyacetic acid derivative pesticide, solid, toxic, Hazard Class: 6.1; Labels: 6.1-Poisonous materials. A DOT regulated marine pollutant.

Purification Methods

Crystallise 2,4-D from MeOH. It is a plant growth substance, a herbicide and is TOXIC. [Beilstein 6 IV 908.]

Incompatibilities

A weak acid, incompatible with bases. Decomposes in sunlight or heat, forming hydrogen chloride and phosgene. Contact with strong oxidizers may cause fire and explosions.

Waste Disposal

Incineration of phenoxys is effective in 1 second @ 982 C, using a straight combustion process or @ 482℃ using catalytic combustion. Over 99% decomposition was reported when small amounts of 2,4-D were burned in a polyethylene bag. See “References” for additional detail. In accordance with 40CFR165, follow (31); recommendations for the disposal of pesticides and pesticide containers. Must be disposed properly by follow- ing (100) Package (2) label directions or by contacting your local or federal environmental control agency, or by contacting your regional EPA office. Consult with environ- mental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform with EPA regu- lations governing storage, transportation, treatment, and waste disposal.

2,4-Dichlorophenoxyacetic acid Preparation Products And Raw materials

Raw materials

Preparation Products


2,4-Dichlorophenoxyacetic acid Suppliers

Global( 320)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
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View Lastest Price from 2,4-Dichlorophenoxyacetic acid manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-12-20 2,4-Dichlorophenoxyacetic acid
94-75-7
US $1.00 / kg 1kg 99% Customized career henan chemical co

2,4-Dichlorophenoxyacetic acid Spectrum


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