Thiophosphorsäure-O,O-bis(1-me-thylethyl)-S-(phenylmethyl)ester

Bezeichnung:Thiophosphorsäure-O,O-bis(1-me-thylethyl)-S-(phenylmethyl)ester

CAS-Nr26087-47-8

Englisch Name:Iprobenfos

CBNumberCB4298968

SummenformelC13H21O3PS

Molgewicht288.34

MOL-Datei26087-47-8.mol

Synonyma

S-Benzyldiisopropylthiophosphat

Thiophosphorsäure-O,O-bis(1-me-thylethyl)-S-(phenylmethyl)ester

Thiophosphorsäure-O,O-bis(1-me-thylethyl)-S-(phenylmethyl)ester physikalisch-chemischer Eigenschaften

Schmelzpunkt	25°C
Siedepunkt	126°C
Dichte	1.1001 g/cm3
Dampfdruck	2.5 x 10^-4 Pa (20 °C)
Brechungsindex	approximate 1.51
Flammpunkt	11 °C
storage temp.	APPROX 4°C
Wasserlöslichkeit	430 mg l^-1(20 °C)
Aggregatzustand	liquid
Biologische Quelle	rabbit
BRN	1974687
CAS Datenbank	26087-47-8(CAS DataBase Reference)
NIST chemische Informationen	Kitazin p(26087-47-8)
EPA chemische Informationen	Phosphorothioic acid, O,O-bis(1-methylethyl) S-(phenylmethyl) ester (26087-47-8)

Sicherheit

Kennzeichnung gefährlicher	Xn;N,N,Xn,T,F
R-Sätze:	22-51/53-39/23/24/25-23/24/25-11
S-Sätze:	61-45-36/37-16-7
RIDADR	UN 3082
WGK Germany	2
RTECS-Nr.	TE6550000
HazardClass	6.1(a)
PackingGroup	II
HS Code	29309090

Gefahreninformationscode (GHS)

Iprobenfos Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R22:Gesundheitsschädlich beim Verschlucken.
R51/53:Giftig 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.
R11:Leichtentzündlich.
S-Sätze Betriebsanweisung:
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
Verwenden
Iprobenfos is a systemic fungicide which provides effective protective and curative control of leaf and ear blast (Pyricularia oryzae), stem rot (Helminthosporium spp.) and sheath blight (Rhizoctonia solani) in rice.
Definition
ChEBI: An organic thiophosphate that is the S-benzyl O,O-diisopropyl ester of phosphorothioic acid. Used as a rice fungicide to control leaf and ear blast, stem rot and sheath blight.
Stoffwechselwegen
Iprobenfos undergoes extensive degradation and metabolism. Primary metabolic pathways include isomerisation to the thionate (P=S) ester, cleavage of the P-S-benzyl and P-O-isopropyl moieties, and transesterification. Benzyl mercaptan, upon cleavage, undergoes additional oxidation reactions to yield the alcohol, carboxylic acid, disulfide and sulfonic acid. The formation of the oxon from the isomerisation product (P=S ester) was minor and was observed only under UV light irradiation. The primary metabolic pathways of iprobenfos are presented in Scheme 1.
Degradation
Iprobenfos (1) is stable to hydrolytic degradation (<50 °C). The DTN value of iprobenfos in aqueous solution was approximately 301-324 days(PM).
Iprobenfos degraded rapidly when deposited as a thin film and exposed to UV light (DT₅₀ ca. 10 min). Two major degradation reactions were observed during the initial phase of the irradiation. The first reaction involved the isomerisation of iprobenfos to O,O-diisopropyl O- benzyl phosphorothioate (2) followed by the oxidative desulfuration of compound 2 to yield the corresponding oxon analogue 3 (O,O-diisopropyl O-benzyl phosphate). The second reaction involved the hydrolytic cleavage of the S-C linkage of iprobenfos to yield O,O-diisopropyl hydrogen phosphorothioate (4) and the cleavage of the P-O-benzyl linkage of compound 3 to yield O,O-diisopropyl hydrogen phosphate (5). Other major photolytic degradation reactions include the cleavage of the parent P-S linkage to O,O-diisopropyl phosphonate (6). Benzyl alcohol (7) and benzyl mercaptan (8) were also detected. Further oxidation of compound 7 yielded benzoic acid (9) and the oxidation of compound 8 yielded benzylsulfonic acid (10), dibenzyl disulfide (11) and sulfuric acid as terminal products. Other minor products detected included transesterification products [O,O,S-triisopropyl phosphorothioate (12), O,O,O-triisopropyl phosphate (13)] and benzyl isopropyl sulfide (14).

Iprobenfos Upstream-Materialien And Downstream Produkte

Thiophosphorsäure-O,O-bis(1-me-thylethyl)-S-(phenylmethyl)ester Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

26087-47-8, Iprobenfos Verwandte Suche:

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