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Chemical Identification
Common Name
Cyromazine
中文通用名
灭蝇胺
IUPAC
N-cyclopropyl-1,3,5-triazine-2,4,6-triamine
CAS
N-cyclopropyl-1,3,5-triazine-2,4,6-triamine
CAS No.
66215-27-8
Molecular Formula
C6H10N6
Molecular Structure
Category
Activity
Insect growth regulator, insecticide
Premix
Thiamethoxam+Cyromazine
Cyromazine+Clothianidin
Abamectin+Cyromazine
Physical Properties
Molecular weight:166.2; Physical form:Colourless crystals. Density:1.35 (20 °C); Melting point:224.9 °C. Vapour pressure:4.48×10-4 mPa (25 °C) ( OECD 104); Henry constant:5.8×10-9 Pa m3 mol-1 ( calc.). Partition coefficient(n-octanol and water):logP = -0.061 ( pH 7.0) ( OECD 107); pKa:5.22, weak base; Solubility:In water 13 g/l ( OECD 105) ( pH 7.1, 25 °C). In methanol 22, isopropanol 2.5, acetone 1.7, n-octanol 1.2, methylene chloride 0.25, toluene 0.015, hexane 0.0002 (all in g/ kg, 20 °C). Stability:Stable up to 310 °C. Stable to hydrolysis for 28 days at up to 70 °C. Solubility in methanol 1.7%.
Toxicology
Oral:Acute oral LD50 for rats 3387 mg/ kg. Percutaneous:Acute percutaneous LD50 for rats >3100 mg/kg. Mild skin irritant; non-irritating to eyes (rabbits). Inhalation: LC50 (4 h) for rats >2.720 mg/l air. ADI:0.03 mg/ kg b.w.
Environmental Profile
Ecotoxicology: 
Algae: LC50 124 mg/l.Bees:Non-toxic to adult honeybees (no contact action up to 5 µg/bee).Birds:Acute oral LD50 for bobwhite quail 1785 mg/kg, Japanese quail 2338 mg/kg, Pekin ducks >1000 mg/kg, mallard ducks >2510 mg/kg,Peking duck >6000 mg/kg.Daphnia: LC50 (48 h) >9.1 mg/l.Fish: LC50 (96 h) for bluegill sunfish >90, carp, catfish and rainbow trout >100 mg/l, bluegill>89.7 mg/l (96 h).Worms: LC50 >1000 mg/ kg.Other beneficial spp.:Non-toxic. Environmental fate: 
Animals:In rats, cyromazine is efficiently excreted, mainly as the parent compound.Soil:Cyromazine and its main metabolite melamine are moderately mobile. Numerous studies conducted (laboratory and field) demonstrate that cyromazine is efficiently degraded by biological mechanisms.Plant:Rapidly metabolised in plants. The principal metabolite is melamine.
WATER SOLUBILITY: 1.1% at 20°C (pH 7.5).
Transport Information
Signal Word:CAUTION; Hazard Class:III (Slightly hazardous)

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