4-[[4-(1,1-dimethylethyl)phenyl]ethoxy]quinazoline

4-tert-butylphenethyl quinazolin-4-yl ether

C₂₀H₂₂N₂O

Form Colourless crystals.

Melting point 77.5-80℃.

Density 1.16.

Solubility In water 0.22 mg/l (20℃). In chloroform >500, toluene 500, acetone 400, methanol 50, isopropanol 50, acetonitrile, hexane 33 (all in g/l, 20℃).

Oral Acute oral LD50 for male rats 134, female rats 138, male mice 2449, female mice 1480 mg/kg.

Skin and eye Acute percutaneous LD50 for rabbits >5000 mg/kg.

Slightly irritating to eyes; non-irritating to skin. Not a skin sensitiser.

Inhalation LC50 (4 h) for male and female rats 1.9 mg/l air.

Acaricide effective, against Eutetranychus, Panonychus and Tetranychus spp. and Brevipalpus phoenicis in almonds, apples, citrus, cotton, grapes and ornamentals.