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Chemical Identification
Common Name
Zineb
中文通用名
代森锌
IUPAC
zinc ethylenebis(dithiocarbamate) (polymeric)
CAS
[[2-[(dithiocarboxy)amino]ethyl]carbamodithioato]](2−)-κSS′]zinc
CAS No.
12122-67-7
Molecular Formula
C4H6N2S4Zn
Molecular Structure
Category
Activity
Fungicide
Premix
Hexaconazole+zineb
Chlorothalonil+zineb

Wettable powder.

Physical Properties
Molecular weight:275.8g/mol;Form Pale yellow powder. M.p. Decomposes at 157℃ without melting;V.p. <0.01 mPa (20℃);KOW logP≤1.3 (20 ℃);Henry <2.76×10-4 Pa m3 mol-1 (calc.)Solubility In water c. 10 mg/l (room temperature). Practically insoluble in common organic solvents. Dissolves in some chelating agents, for example salts of ethylenediaminetetra-acetic acid, from which it cannot be recovered.Stability Unstable to light, moisture and heat on prolonged storage (decomposition is reduced by stabilisers). When precipitated from concentrated solution, a polymer is formed which is less fungicidal.F.p. 90 ℃; autoignition temperature 149℃
Toxicology
Oral Acute oral LD50 for rats >5200 mg/kg.Skin and eye Acute percutaneous LD50 for rats >6000 mg/kg. Slight irritation of skin and mucous membranes.Phytotoxicity:Non-phytotoxic, except for zinc-sensitive plants such as tobacco and cucurbits.
Environmental Profile
Ecotoxicology:
Fish LC50 for perch 2, roach 6-8 mg/l.Bees Not toxic to bees.
Environmental fate:
EHC 78 (WHO, 1988; general review of dithiocarbamates).Plants Ethylenethiourea is the major metabolite in plants. Ethylenethiuram monosulfide and presumably ethylenethiuram disulfide and sulfur are also formed.
Transport Information
Hazard Class:III(Slightly hazardous)

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