DIMETHIRIMOL Property

Melting point:

103℃

Boiling point:

348.66°C (rough estimate)

Density 

1.0465 (rough estimate)

vapor pressure 

1.5 x 10^-3 Pa at 30 °C

refractive index 

1.5700 (estimate)

storage temp. 

0-6°C

pka

5

Water Solubility 

1.2 g l^-1 (25 °C)

EPA Substance Registry System

Dimethirimol (5221-53-4)

Safety

Hazard Codes 

Xn

Risk Statements 

21-52

Safety Statements 

36/37

Toxicity

LD50 in female rats (mg/kg): 200-400 i.p., >4000 orally (Elias)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H311Toxic in contact with skin

Precautionary statements

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P312Call a POISON CENTER or doctor/physician if you feel unwell.

P322Specific measures (see …on this label).

P361Remove/Take off immediately all contaminated clothing.

P363Wash contaminated clothing before reuse.

P405Store locked up.

P501Dispose of contents/container to..…

DIMETHIRIMOL Chemical Properties,Usage,Production

Uses

Dimethirimol is a systemic fungicide that provides both protective and curative control of powdery mildew (Sphaeratheca fulginea) in cucurbits. Other uses include tobacco, tomatoes and ornamentals.

Uses

Dimethrimolis a fungicide used initially to prevent powdery mildew and other fungal infections or crops. Pesticide.

Uses

Fungicide.

Definition

ChEBI: A member of the class of aminopyrimidines that is 2-dimethylaminopyrimidine carrying methyl, butyl and hydroxy substituents at posiitons 4, 5 and 6 respectively. A fungicide first marketed in 1970, and used particularly in glasshouses to control powdery mi dew, it is no longer approved for use within the European Union.

Metabolic pathway

Information presented in this summary is abstracted from unpublished data in the 1971 ICI dimethirimol petition submitted to the Canadian authority. Dimethirimol is rapidly metabolised in both plants and animals. Primary metabolic reactions in soils, plants and animals are N-dealkylation, hydroxylation of the butyl group and the direct conjugation of dimethirimol in plants (glucosides) and animals (glucuronides). Metabolic pathways are shown in Scheme 1.

Degradation

Dimethirimol (1) is stable to heat and in acid and alkahe solutions. It is decomposed rather rapidly in aqueous solution when exposed to sunlight with an observed DT₅₀ of 7 days.