Asulam

Bezeichnung:Asulam

CAS-Nr3337-71-1

Englisch Name:Asulam

CBNumberCB3244887

SummenformelC8H10N2O4S

Molgewicht230.24

MOL-Datei3337-71-1.mol

Synonyma

Asulam

Asulam physikalisch-chemischer Eigenschaften

Schmelzpunkt	142-144°C (dec.)
Dichte	1.4655 (rough estimate)
Brechungsindex	1.5690 (estimate)
storage temp.	0-6°C
Löslichkeit	DMSO (Slightly), Methanol (Slightly)
pka	4.82(at 25℃)
Farbe	Pale Brown to Light Brown
Wasserlöslichkeit	5g/L(room temperature)
Merck	13,862
BRN	2697523
LogP	-0.270
NIST chemische Informationen	Asulam(3337-71-1)
EPA chemische Informationen	Asulam (3337-71-1)

Sicherheit

Kennzeichnung gefährlicher	Xn
R-Sätze:	22
WGK Germany	3
RTECS-Nr.	FD1190000
HS Code	29350090
Giftige Stoffe Daten	3337-71-1(Hazardous Substances Data)
Toxizität	LD50 in rats, mice, dogs, rabbits (mg/kg): >5000, >5000, >5000, >2000 orally; in rats (mg/kg): >1200 dermally (Brockelsby)

Gefahreninformationscode (GHS)

Asulam Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R22:Gesundheitsschädlich beim Verschlucken.
Beschreibung
Asulam is a sulfonamide and can be formulated as a sodium salt. It is very water soluble and is a very systemic herbicide following foliar and root uptake, owing to its physicochemical properties (Table 1). The Log P (Kow) of 1.01 and pKa of 4.82 are optimal for phloem mobility in the plant (4). These properties contribute to the herbicidal effectiveness against perennial weeds where translocation to underground meristematic organs is essential for effective control.
Chemische Eigenschaften
Light Brown Solid
Verwenden
Herbicide.
Verwenden
Carbamate herbicide; folic acid biosynthesis inhibitor.
Verwenden
Systemic, pre- and postemergence herbicide used to control several perennial grasses and certain broad-leaved weeds such as brackenfern, crabgrass, itchgrass, paragrass, tansy ragwort, and wild mustard, in alfalfa, uncropped land, certain ornamentals and turf.
Definition
ChEBI: A carbamate ester that is methyl carbamate substituted by a (4-aminophenyl)sulfonyl group at the nitrogen atom.
Health Hazard
Low order of toxicity; no adverse effect onskin reported; ingestion of large dose couldproduce cholinergic effects.
LD50 oral (rat): 2000 mg/kg.
Pharmakologie
Asulam-induced growth inhibition of carrot cell cultures was reversed by 4-aminobenzoic acid (8), and depletion of folate derivatives in treated plants (7) provides further evidence that the synthesis of folic acid is the primary target of asulam. Furthermore, asulam is structurally related to sulfonilamide and to sulfonamide antimicrobial drugs, which are competitive inhibitors of 7,8-dihydropteroate synthase (DHPS) (5,9).
Environmental Fate
Soil. It is not persistent in soils since its half-life is approximately 6–14 days (Hartley and Kidd, 1987). The short persistence time is affected by soil temperature and moisture content. The half-life of asulam in a heavy clay soil having a moisture content of 34% and maintained at 20°C was 7 days (Smith and Walker, 1977). In soil, sulfanilamide was reported as a product of hydrolysis. In non-sterile soils, this compound further degraded to unidentifiable products (Smith, 1988) which may include substituted anilines (Bartha, 1971).
Photolytic. The reported photolytic half-lives for asulam in water at pH 3 and 9 were 2.5 and 9 days, respectively (Humburg et al., 1989)
Chemical/Physical. Forms water-soluble salts (Hartley and Kidd, 1987). When heated to 75°C, asulam decomposed to sulfanilic acid, carbamic acid and sulfanilamide. At 90°C, 4-nitro- and 4-nitrosobenzene sulfonic acids were released (Rajagopal et a

Asulam Upstream-Materialien And Downstream Produkte

Asulam Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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