ChemicalBook CAS DataBase List 66841-25-6

66841-25-6

Name	TRALOMETHRIN
CAS	66841-25-6
EINECS(EC#)	266-493-1
Molecular Formula	C22H19Br4NO3
MDL Number	MFCD00210380
Molecular Weight	665.01
MOL File	66841-25-6.mol

Chemical Properties

Melting point	143℃
Boiling point	185～190℃ (0.1mmHg)
density	1.70 g/cm3 (20℃)
vapor pressure	4.8×10^-9 Pa (25 °C)
refractive index	1.6300 (estimate)
storage temp.	0-6°C
form	neat
Water Solubility	0.08 mg l^-1
EPA Substance Registry System	Tralomethrin (66841-25-6)

Safety Data

Hazard Codes	Xn,N
Risk Statements	22-36/38-50/53 less more
Safety Statements	26-60-61 less more
RIDADR	2588
WGK Germany	3
HazardClass	6.1(b)
PackingGroup	III
Hazardous Substances Data	66841-25-6(Hazardous Substances Data)

Raw materials And Preparation Products

Hazard Information

Definition

ChEBI: A carboxylic ester resulting from the formal condensation between (1R)-cis-2,2-dimethyl-3-(1,2,2,2-tetrabromoethyl)cyclopropanecarboxylic acid and the alcoholic hydroxy group of (2S)-hydroxy(3-phenoxypheny )acetonitrile.

Uses

Insecticide.

Description

Orange-to-yellow resinous solid (technical grade >39%)

Agricultural Uses

Insecticide: Not approved for use in EU countries. Registered for use in the U.S.

Trade name

DETHMOR®; HAG-107®; RU-25472®; RU-25474®; SCOUT®; SCOUT® X-TRA Gel insecticide

Metabolic pathway

Tralomethrin probably owes most of its action to rapid conversion by several mechanisms to deltamethrin. Information on its photodegradation, degradation in soil, and its metabolism in plants, insects and animals has been published and supports this conclusion.

Degradation

Tralomethrin is stable as a solid but is labile to base. Acidic media reduce the tendency to hydrolysis and epimerisation. It was readily debrominated when solutions or thin films were irradiated at 360 nm or by sunlight. Homolytic fission of a C-Br bond initiates this reaction, which affords deltamethrin (2). Some epimerisation to trans-tralomethrin and thence trans-deltamethrin also occurred. Dehydrobromination also affords deltamethrin and the tribromo derivative (8). Ester cleavage to the acid (3) and to the cyanohydrin (5) and thence to 3PBAl (6) and 3PBA (7) is important in the solid phase but not in solution (Ruzo and Casida, 1981). The products are shown in Scheme 1.

Toxicity evaluation

Acute oral LD₅₀ for rats: 99-3,000 mg/kg depending on the carrier used

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