2,4-Dichlorophenoxyacetic acid
Description References- Product Name
- 2,4-Dichlorophenoxyacetic acid
- CAS No.
- 94-75-7
- Chemical Name
- 2,4-Dichlorophenoxyacetic acid
- Synonyms
- 2,4-D;Estone;For;2,4-D ACID;Amidox;Miracle;Crotilin;Fernimine;Transamine;2,4-dichlorophenoxyacetic
- CBNumber
- CB8762041
- Molecular Formula
- C8H6Cl2O3
- Formula Weight
- 221.04
- MOL File
- 94-75-7.mol
2,4-Dichlorophenoxyacetic acid Property
- Melting point:
- 136-140 °C (lit.)
- 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.
- 2-8°C
- solubility
- Soluble in organic solvents (ethanol, acetone, dioxane)
- pka
- pK1:2.64 (25°C)
- form
- crystalline
- color
- off-white to tan
- PH Range
- Acidic
- Odor Threshold
- 3.13 ppm
- Water Solubility
- Slightly soluble. Decomposes. 0.0890 g/100 mL
- Merck
- 14,2796
- BRN
- 1214242
- Henry's Law Constant
- 6.72 and 0.84 x 10-5 atm?m3/mol were reported at pH values of 1 and 7, respectively (wetted-wall column, Rice et al., 1997a)
- 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.
- LogP
- 2.810
- CAS DataBase Reference
- 94-75-7(CAS DataBase Reference)
- NIST Chemistry Reference
- (2,4-Dichlorophenoxy)acetic acid(94-75-7)
- IARC
- 2B (Vol. 113) 2018
- EPA Substance Registry System
- 2,4-D (94-75-7)
Safety
- 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
- OEB
- B
- OEL
- TWA: 10 mg/m3
- WGK Germany
- 2
- RTECS
- AG6825000
- Autoignition Temperature
- > 180 °C
- TSCA
- Yes
- HazardClass
- 6.1
- PackingGroup
- III
- HS Code
- 29189090
- Hazardous Substances Data
- 94-75-7(Hazardous Substances Data)
- Toxicity
- LD50 (oral): rat [free] 375 mg/kg, [-Na] 666-805 mg/kg.
- IDLA
- 100 mg/m3
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Danger
- Hazard statements
-
H302Harmful if swallowed
H317May cause an allergic skin reaction
H318Causes serious eye damage
H335May cause respiratory irritation
H410Very toxic to aquatic life with long lasting effects
- Precautionary statements
-
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P302+P352IF ON SKIN: wash with plenty of soap and water.
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
N-Bromosuccinimide Price
- Product number
- 76514
- Product name
- 2,4-D
- Purity
- certified reference material, TraceCERT
- Packaging
- 100mg
- Price
- $127
- Updated
- 2024/03/01
- Product number
- 49083
- Product name
- 2,4-D
- Purity
- PESTANAL?, analytical standard
- Packaging
- 1000mg
- Price
- $73
- Updated
- 2024/03/01
- Product number
- 31518
- Product name
- 2,4-D
- Purity
- PESTANAL , analytical standard
- Packaging
- 250mg
- Price
- $39.7
- Updated
- 2024/03/01
- Product number
- 40330
- Product name
- 2,4-D solution
- Purity
- certified reference material, 5000?μg/mL in acetonitrile
- Packaging
- 1ML
- Price
- $40.9
- Updated
- 2022/05/15
- Product number
- D0396
- Product name
- 2,4-Dichlorophenoxyacetic Acid
- Purity
- >97.0%(T)
- Packaging
- 25g
- Price
- $76
- Updated
- 2024/03/01
2,4-Dichlorophenoxyacetic acid Chemical Properties,Usage,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
Description
2,4-D free acids, esters, amines, and salts are formulated in water suspensions or solutions, or in various organic solvents, for application as systemic herbicides that are used postemergence for selective control of broadleaf weeds.
Chemical Properties
2,4-Dichlorophenoxyacetic acid is a white to yellow crystalline powder with a slight phenolic odor. It is used as a herbicide for the selective control of broad-leaved weeds in agriculture, and for the control of woody plants along roadsides, railways, and utilities rights of way. It is one of the most widely used herbicides in the world and is commonly used on crops such as wheat and corn, and on pasture and rangelands. It is also used to control broad-leaved aquatic weeds.
Physical properties
Odorless, white to pale yellow, powder or prismatic crystals. Impure formulations containing 2,4- D as the main component may have a phenolic odor.
Uses
2,4-Dichlorophenoxyacetic acid is often formulated as various forms of inorganic salts or esters. 2,4-D was first registered as a herbicide in 1948, and its annual production was estimated at 52–67 million lb in 1990. The primary use of 2,4-D is for control of broadleaf weeds, and as such, it is used for a large spectrum of applications in agriculture, forestry, and lawn care. 2,4-D also is used along right-ofways, on rangelands, parks, and in aquatic environments.
Uses
2,4-D is one of the most widely used herbicides. It is a chlorine-substituted phenoxyacetic acid herbicide used for postemergence control of annual and perennial broad-leaved weeds in fruits, vegetables, turfs and ornamentals.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).
Uses
2,4-D is registered with the US Environmental Protection Agency (EPA) for use on a variety of food/feed sites, turf, lawn, aquatic sites, and forestry applications, and as a growth regulator in citrus crops. Residents and professional applicators may use 2,4-D on home lawns.
Preparation
Two processes are currently used for the production of 2,4-Dichlorophenoxyacetic acid. In the first process, phenol is condensed with chloroacetic acid forming phenoxyacetic acid, which is subsequently chlorinated. In the second process, phenol is chlorinated, generating 2,4-dichlorophenol, which is subsequently condensed with chloroacetic acid. The butyl ester derivative of 2,4-D is produced by the esterification of the acid with butanol in the presence of a ferric chloride catalyst and chlorine (Liu et al., 2013).
Preparation of 2,4-Dichlorophenoxyacetic acid
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
The acute toxic symptoms from ingestion,absorption through skin, and inhalation ofits dusts include lethargy, stupor, weakness,incoordination, muscular twitch, nausea, vomiting, 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) have investigated acute, pharmacokinetic, and subchronic 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.
Trade name
Hedonal; 2,4-D; Estone; Agrotect; Fernesta; Fernimine; Netagrone; Tributon; Vergemaster; Amoxone; Dicopur; Dormone; Ipaner; Moxone; Phenox; Pielik; Rhodia; Weedone; B-Selektonon.
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 anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seekmedical attention immediately. If this chemical contactsthe skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove fromexposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing hasstopped and CPR if heart action has stopped. Transferpromptly to a medical facility. When this chemical hasbeen swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit.
Carcinogenicity
Collectively, the epidemiological and toxicological data show that 2,4-D is not likely to be carcinogenic in humans unless it is acting through an unknown mechanism that is not evident in animals. According to the calculated RfD and data from exposure studies, the general public should not experience toxic effects from exposure to 2,4-D. Because workers involved in the manufacture or application of 2,4-D may be exposed to levels above the RfD, appropriate protective equipment should be used.
Environmental Fate
2,4-Dichlorophenoxyacetic acid (2,4-d) is rapidly degraded by microbes in soil and water, with a half-life of 3-22 days in different soils. 2,4-d is weakly sorbed by soil with sorption generally increasing with increasing soil organic carbon content. Leaching to groundwater is most likely in coarse-grained sandy soils with low organic content or with very basic soils. In general, little runoff occurs with 2,4-d or its amine salts.
Metabolism
Chemical. 2,4-D and its salts are very stable, but
esters are sensitive to hydrolysis under acidic and basic conditions. In the field, 2,4-D losses due to
photodegradation are minor. 2,4-D is a strong acid and
forms water-soluble salts with amines and alkali metals.
A sequestering agent is included in 2,4-D formulations to
prevent precipitation of Ca2+ andMg2+ salts in hard water.
Plant. 2,4-D detoxification occurs relatively slowly in
plants. There are many possible routes of detoxification,
and these are usually grouped into those reactions that are
consistent with phase I metabolism and those that are consistent
with phase II metabolism. Phase I reactions that
have been observed to occur with 2,4-D include dechlorination,
decarboxylation, hydroxylation, and dealkylation.
Phase II reactions that have been observed to occur
with 2,4-D include conjugation of the side chain to
amino acids, particularly glutamate and aspartate, and glucose conjugation following hydroxylation of the phenoxy
ring. Selectivity differences among broadleaf species
may be accounted for by differences in the rates of 2,4-D
detoxification.
Soil. Microbial degradation in the soil involves cleavage
of the acid side chain, decarboxylation, hydroxylation, and
ring opening.
storage
Color Code—Blue: Health Hazard/Poison: Storein a secure poison location. Prior to working with 2,4-D,you should be trained on its proper handling and storage.Store in tightly closed containers in a dark, cool, well-ventilated area. Keep away from oxidizers, heat, and sunlight. Aregulated, marked area should be established where thischemical is stored in compliance with OSHA Standard1910.1045.
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.]
Toxicity evaluation
2,4-D is excreted unchanged in the urine of humans and rat. When used under normal conditions, 2,4-D does not appear to produce acute toxic effects on any animal species. The acute oral LD50s of 2,4- D in rat and mouse are 639–764 mg/kg, and 138 mg/kg, respectively.
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 environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform with EPA regulations governing storage, transportation, treatment, and waste disposal.
2,4-Dichlorophenoxyacetic acid Preparation Products And Raw materials
Raw materials
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- 0512-87182056 18013166090
- Fax
- 0512-87182056
- lingling.qi@yacoo.com.cn
- Country
- China
- ProdList
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- Advantage
- 60
- Tel
- 027-59262863 13277907145 3091977954
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- 027-59420980
- Country
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View Lastest Price from 2,4-Dichlorophenoxyacetic acid manufacturers
- Product
- 2,4-Dichlorophenoxyacetic acid 94-75-7
- Price
- US $100.00-75.00/kg
- Min. Order
- 1kg
- Purity
- 99%
- Supply Ability
- 5000
- Release date
- 2024-08-21
- Product
- 2,4-D 94-75-7
- Price
- US $0.00/KG
- Min. Order
- 100KG
- Purity
- 98
- Supply Ability
- 200TONS
- Release date
- 2024-07-17
- Product
- 2,4-Dichlorophenoxyacetic acid 94-75-7
- Price
- US $10.70/KG
- Min. Order
- 10KG
- Purity
- 99%
- Supply Ability
- 10000kg
- Release date
- 2024-08-20