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2,4-D

2,4-Dichlorophenoxyacetic acid Struktur
94-75-7
CAS-Nr.
94-75-7
Bezeichnung:
2,4-D
Englisch Name:
2,4-Dichlorophenoxyacetic acid
Synonyma:
For;GAPL;dma4;u46d;moxon;RASA4;DMA-4;CAPRI;DYMEC;KAY-D
CBNumber:
CB8762041
Summenformel:
C8H6Cl2O3
Molgewicht:
221.04
MOL-Datei:
94-75-7.mol

2,4-D Eigenschaften

Schmelzpunkt:
136-140 °C (lit.)
Siedepunkt:
160 °C (0.4 mmHg)
Dichte
1.563
Dampfdruck
0.4 mm Hg ( 160 °C)
Brechungsindex
1.5000 (estimate)
Flammpunkt:
160°C/0.4mm
storage temp. 
2-8°C
Löslichkeit
Soluble in organic solvents (ethanol, acetone, dioxane)
pka
pK1:2.64 (25°C)
Aggregatzustand
crystalline
Farbe
off-white to tan
Säure-Base-Indikators(pH-Indikatoren)
Acidic
Odor Threshold
3.13 ppm
Wasserlöslichkeit
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)
Expositionsgrenzwerte
NIOSH REL: TWA 10 mg/m3, IDLH 100 mg/m3; OSHA PEL: TWA 10 mg/m3; ACGIH TLV: TWA 10 mg/m3.
Stabilität:
Stable, but moisture-sensitive and may be light-sensitive. Incompatible with strong oxidizing agents, corrodes many metals. Decomposes in water.
CAS Datenbank
94-75-7(CAS DataBase Reference)
IARC
2B (Vol. 113) 2018
NIST chemische Informationen
(2,4-Dichlorophenoxy)acetic acid(94-75-7)
EPA chemische Informationen
2,4-D (94-75-7)
Sicherheit
  • Risiko- und Sicherheitserklärung
  • Gefahreninformationscode (GHS)
Kennzeichnung gefährlicher Xn,Xi,T,F
R-Sätze: 22-37-41-43-52/53-39/23/24/25-23/24/25-36/37/38-11-36-20/21/22-67-66
S-Sätze: 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-Nr. AG6825000
Selbstentzündungstemperatur > 180 °C
TSCA  Yes
HazardClass  6.1
PackingGroup  III
HS Code  29189090
Giftige Stoffe Daten 94-75-7(Hazardous Substances Data)
Toxizität LD50 (oral): rat [free] 375 mg/kg, [-Na] 666-805 mg/kg.
IDLA 100 mg/m3
Bildanzeige (GHS)
Alarmwort Achtung
Gefahrenhinweise
Code Gefahrenhinweise Gefahrenklasse Abteilung Alarmwort Symbol P-Code
H302 Gesundheitsschädlich bei Verschlucken. Akute Toxizität oral Kategorie 4 Warnung P264, P270, P301+P312, P330, P501
H317 Kann allergische Hautreaktionen verursachen. Sensibilisierung der Haut Kategorie 1A Warnung P261, P272, P280, P302+P352,P333+P313, P321, P363, P501
H318 Verursacht schwere Augenschäden. Schwere Augenschädigung Kategorie 1 Achtung P280, P305+P351+P338, P310
H335 Kann die Atemwege reizen. Spezifische Zielorgan-Toxizität (einmalige Exposition) Kategorie 3 (Atemwegsreizung) Warnung
H412 Schädlich für Wasserorganismen, mit langfristiger Wirkung. Langfristig (chronisch) gewässergefährdend Kategorie 3 P273, P501
Sicherheit
P261 Einatmen von Staub vermeiden.
P264 Nach Gebrauch gründlich waschen.
P264 Nach Gebrauch gründlich waschen.
P273 Freisetzung in die Umwelt vermeiden.
P280 Schutzhandschuhe/Schutzkleidung/Augenschutz tragen.

2,4-D Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD

FARBLOSE KRISTALLE ODER WEISSES PULVER.

CHEMISCHE GEFAHREN

Zersetzung beim Erhitzen unter Bildung giftiger Rauche mit Chlorwasserstoff. Reagiert mit starken Oxidationsmitteln unter Feuer- und Explosionsgefahr.. Greift einige Beschichtungsarten und Metalle an.

ARBEITSPLATZGRENZWERTE

TLV: 10 mg/m?(als TWA); Krebskategorie A4 (nicht klassifizierbar als krebserzeugend für den Menschen); (ACGIH 2005).
MAK: (Einatembare Fraktion) 1 mg/m? Spitzenbegrenzung: überschreitungsfaktor II(8); Hautresorption; Schwangerschaft: Gruppe C; (DFG 2005).

AUFNAHMEWEGE

Aufnahme in den Körper durch Inhalation des Aerosols, über die Haut und durch Verschlucken.

INHALATIONSGEFAHREN

Eine gesundheitsschädliche Partikelkonzentration in der Luft kann beim Versprühen oder Dispergieren schnell erreicht werden, vor allem als Pulver.

WIRKUNGEN BEI KURZZEITEXPOSITION

WIRKUNGEN BEI KURZZEITEXPOSITION:
Die Substanz reizt die Haut, die Atemwege und die Augen. Bei hohen Konzentrationen sind Auswirkungen auf das Nervensystem möglich.

WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION

(S. Anm.)

LECKAGE

Persönliche Schutzausrüstung: Atemschutzgerät, P2-Filter für schädliche Partikel. NICHT in die Umwelt gelangen lassen. Verschüttetes Material in abgedeckten Kunststoffbehältern sammeln; falls erforderlich durch Anfeuchten Staubentwicklung verhindern. Reste sorgfältig sammeln. An sicheren Ort bringen.

R-Sätze Betriebsanweisung:

R22:Gesundheitsschädlich beim Verschlucken.
R37:Reizt die Atmungsorgane.
R41:Gefahr ernster Augenschäden.
R43:Sensibilisierung durch Hautkontakt möglich.
R52/53:Schädlich für Wasserorganismen, kann in Gewässern längerfristig schädliche Wirkungen haben.
R39/23/24/25:Giftig: ernste Gefahr irreversiblen Schadens durch Einatmen, Berührung mit der Haut und durch Verschlucken.
R23/24/25:Giftig beim Einatmen, Verschlucken und Berührung mit der Haut.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R11:Leichtentzündlich.

S-Sätze Betriebsanweisung:

S24/25:Berührung mit den Augen und der Haut vermeiden.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S46:Bei Verschlucken sofort ärztlichen Rat einholen und Verpackung oder Etikett vorzeigen.
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
S2:Darf nicht in die Hände von Kindern gelangen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
S27:Beschmutzte, getränkte Kleidung sofort ausziehen.
S16:Von Zündquellen fernhalten - Nicht rauchen.

Beschreibung

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.

Chemische Eigenschaften

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.

Physikalische Eigenschaften

Odorless, white to pale yellow, powder or prismatic crystals. Impure formulations containing 2,4- D as the main component may have a phenolic odor.

Verwenden

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.

synthetische

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
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.

Allgemeine Beschreibung

Odorless white to tan solid. Sinks in water.

Air & Water Reaktionen

Decomposes rapidly in water.

Reaktivität anzeigen

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

Brandgefahr

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

Landwirtschaftliche Anwendung

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.

Handelsname

Hedonal; 2,4-D; Estone; Agrotect; Fernesta; Fernimine; Netagrone; Tributon; Vergemaster; Amoxone; Dicopur; Dormone; Ipaner; Moxone; Phenox; Pielik; Rhodia; Weedone; B-Selektonon.

mögliche Exposition

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.

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.

Stoffwechsel

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.

Versand/Shipping

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

läuterung methode

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

Inkompatibilitäten

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-D Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte


2,4-D Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Global( 425)Lieferanten
Firmenname Telefon E-Mail Land Produktkatalog Edge Rate
Henan DaKen Chemical CO.,LTD.
371-66670886
info@dakenchem.com China 15400 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693
info@tianfuchem.com China 22022 55
Anhui Royal Chemical Co., Ltd.
+86-25-86655873 +8613962173137
marketing@royal-chem.com China 536 55
career henan chemical co
+86-0371-86658258
sales@coreychem.com China 29960 58
Hubei Jusheng Technology Co.,Ltd.
86-18871470254
linda@hubeijusheng.com CHINA 28229 58
Hebei Guanlang Biotechnology Co., Ltd.
+86-19930503282 +86-19930503282
alice@crovellbio.com China 5939 58
Xiamen AmoyChem Co., Ltd
592-6051114
sales@amoychem.com CHINA 6369 58
Xi'an Kono chem co., Ltd.,
029-86107037 13289246953
info@konochemical.com CHINA 3000 58
Hubei xin bonus chemical co. LTD
86-13657291602
linda@hubeijusheng.com CHINA 23035 58
Chongqing Chemdad Co., Ltd
+8613650506873
sales@chemdad.com CHINA 37442 58

94-75-7(2,4-D)Verwandte Suche:


  • Esterone four
  • Estone
  • Farmon 2,4-d
  • Fernimine
  • Fernoxone
  • Ferxone
  • For
  • Foredex 75
  • foredex75
  • Formula 40
  • 2,4-D LV6
  • Agrotect
  • Amidox
  • Amoxone
  • BH 2,4-D
  • B-Selektonon
  • Chloroxone
  • Crotilin
  • Decamine
  • Dicopur
  • Dicotox
  • Dormone
  • Emulsamine BK
  • Envert DT
  • Helena 2,4-D
  • Ipaner
  • Netagrone
  • Pennamine
  • U-5043
  • Weed Tox
  • Weedar 64A
  • Weedone-2,4-DP
  • Weedtrol
  • greencrossweed-no-more"80"
  • Hedonal (the herbicide)
  • Hedonal, herbicide
  • Herbidal
  • hivol-44
  • Krotiline
  • Kwas 2,4-dwuchlorofenoksyoctowy
  • kwas2,4-dwuchlorofenoksyoctowy
  • Kwasu 2,4-dwuchlorofenoksyoctowego
  • kwasu2,4-dwuchlorofenoksyoctowego
  • Kyselina 2,4-dichlorfenoxyoctova
  • kyselina2,4-dichlorfenoxyoctova
  • Lawn-keep
  • macondray
  • Macrondray
  • Miracle
  • Monosan
  • Mota Maskros
  • motamaskros
  • moxon
  • Moxone
  • NA 2765
  • Netagrone 600
  • netagrone600
  • NSC 423
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