See All ProductsSpiroxamine

Action

Fungicide

Use

Controls powdery mildew, leaf spot, and rust in cereals, grapes, bananas, hops, peas, ornamentals, and selected vegetables and fruit.

Formulation

Capsule suspension, emulsifiable concentrate, emulsion, oil in water, suspension concentrate.

Identification

Common Name

Spiroxamine (BSI, ISO, F-ISO)

Exp. Code Number

KWG 4168 (Bayer)

CAS Code

118134-30-8

Chemistry

Compositions

8-tert-butyl-1,4-dioxaspiro[4.5]decan-2-ylmethyl(ethyl)(propyl)amine (IUPAC); 8-(1,1-dimethylethyl)-N-ethyl-N-propyl-1,4-dioxaspiro[4.5]decane-2-methanamine (CAS)

Properties

Comprises 2 diastereoisomers, A & B, in the proportions 49-56% & 51-44%. Tech: light brown, oily liquid. Melting point <-170°C.

Molecular Formula

C18H35NO2.

Mode of Action / Resistance Management

Chemical Group

spiroketal-amines

Mode of Action

sterol biosynthesis in membranes

Action Group

FRAC Code 5

Target Site

G2: Δ14-reductase and Δ8→Δ7-isomerase in sterol biosynthesis

Risk Note

Low to Medium risk

Environmental Guidelines

Hazard

Fish: LD50 (96 h) 18.5 mg/l (rainbow trout), 7.13 mg/l (bluegill sunfish). Bird: LD50 565 mg/kg (bobwhite quail); Dietary LC50 >5000 mg/kg (bobwhite quail, mallard ducks). Bees: LD50 (oral) >100 µg/bee, (contact) 4.2 µg/bee.

Water Solubility

At 20°C: mixture of A & B: >200 x 103 mg/l (pH 3); A: 470 mg/l (pH 7), 14 mg/l (pH 9); B: 340 mg/l (pH 7), 10 mg/l (pH 9) (both diastereoisomers)

Safety Guidelines

Signal Word

WARNING

Toxicity Class

II

Toxicity

(Rat): Oral LD50 595 mg/kg (male), 500-560 mg/kg (female); Dermal LD50 >1600 mg/kg (male), 1068 mg/kg (b.w. female); Inhalation: LC50 (4 h) 2772 mg/m3 (male), 1982 mg/m3 (female).