TCA-sodium

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

TCA-sodium

IUPAC

sodium trichloroacetate

CAS

sodium trichloroacetate

CAS No.

650-51-1

Molecular Formula

C₂Cl₃NaO₂

Molecular Structure

General Product Information

Category

Herbicides > Halogenated aliphatic herbicides

Activity

Herbicide

Premix

Premix Parters: anthraquinone captan; carbendazim; cyprodinil fludioxonil; dichlofluanid; dichlofluanid permethrin; difenoconazole fludioxonil; fenpropidin; fenpropidin propiconazole; fludioxonil; imazalil; imazalil metalaxyl; imidacloprid metalaxyl; metalaxyl; permethrin; prochloraz; propiconazole; prothioconazole; thiram; tolylfluanid; triadimefon; triadimenol; tridemorph; trifloxystrobin;

Physical & Safety Data

Physical Properties

Molecular weight:185.4; Physical form:Yellowish, deliquescent powder. Composition:The name TCA has been used variously to refer either to the acid or to the sodium salt (see Common name). The names used here are trichloroacetic acid (for the acid) and TCA-sodium (for the salt). Melting point:Decomposes at 165-200 °C; Vapour pressure:<0.1 mPa (70 °C); Solubility:In water 1.2 kg/l (25 °C). In methanol 232, acetone 7.6, diethyl ether 0.2, benzene 0.07, carbon tetrachloride 0.04, heptane 0.02 (all in g/l, 25 °C).; Stability:Stable under dry conditions, but decomposes in aqueous, strongly alkaline media.;

Toxicology

Oral:Acute oral LD₅₀ for rats 3200-5000, mice 3600-5600 mg/kg. Percutaneous:Acute percutaneous LD₅₀ for rats >2000 mg/kg. Irritant to skin, eyes, and mucous membranes. Corrosive to skin on prolonged contact. Inhalation: LC₅₀ (4 h) for rats >365 mg/l air.

Environmental Profile

Ecotoxicology:
Bees:Not toxic to bees.Birds:Acute oral LD₅₀ for chickens 4280 mg/kg.Fish:Not toxic to fish. Threshold value for toxic activity c. 11 000 mg/l for perch.

Environmental fate:
Soil:In soil, microbial degradation involves chloride formation, but is slower than for dalapon-sodium. TCA-sodium is not tightly adsorbed, and may be leached by heavy rainfall. Persists in soil for c. 21-90 days, depending upon rate applied, soil moi

Transport Information

Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)