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Common NameDaminozide
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中文通用名丁酰肼
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IUPACN-(dimethylamino)succinamic acid
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CASbutanedioic acid mono(2,2-dimethylhydrazide)
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CAS No.1596-84-5
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Molecular FormulaC6H12N2O3
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Molecular Structure
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Category
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ActivityPlant growth regulator
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Physical PropertiesMolecular weight:160.2; Physical form:Tech. is a white powder, with a faint amine-like odour. Composition:Tech. grade daminozide is >99% pure. Melting point:157-164 °C; Vapour pressure:22.7 mPa (23 °C); Partition coefficient(n-octanol and water):logP = -1.50 ( pH 5, 7 and 9, 21 °C); pKa:4.68 (20 °C); Solubility:In distilled water 100 g/ kg (25 °C). In methanol 50, acetone 25 (both in g/ kg, 25 °C). Insoluble in hydrocarbons.; Stability:No measurable hydrolysis over 30 d at pH 5, 7 and 9. Hydrolysed by acids and alkalis on heating. Solutions are slowly decomposed by light.
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ToxicologyOral:Acute oral
LD50 for rats >5000 mg/kg. Percutaneous:Acute percutaneous LD50 for rabbits >5000 mg/kg. Inhalation: 50 (4 h) for rats >2.1 /l air. (Rabbit): Mild eye irritation; nonirritating to skin -
Environmental ProfileEcotoxicology:
Algae:EC50 for Chlorella 180 ppm.Bees:Not toxic to bees. LD50 >100 µg/bee (85% formulation).Birds:Dietary LC50 (8 d) for mallard ducks and bobwhite quail >10 000 mg/ kg diet.Daphnia: LC50 (96 h) 76 mg/l.Fish: LC50 (96 h) for rainbow trout 149, bluegill sunfish 423 mg/l.Worms: LC50 for earthworms >632 ppm.
Environmental fate:
Soil:Daminozide quickly dissipates in soil with most residues becoming bound, with some CO2 formation. In aerobic soil, half of the daminozide is no longer recoverable after 17 h. No 1,1-dimethylhydrazine (UDMH) or N-nitrosodimethylamine wePlant:Metabolites include 1,1-dimethylhydrazine.
WATER SOLUBILITY: 100 gm/l. -
Transport InformationSignal Word:CAUTION; Hazard Class:III (Slightly hazardous)
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