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Chemical Identification
Common Name
DNOC
中文通用名
二硝酚
IUPAC
4,6-dinitro-o-cresol
CAS
2-methyl-4,6-dinitrophenol
CAS No.
534-52-1
Molecular Formula
C7H6N2O5
Molecular Structure
Category
Activity
Insecticide, acaricide, fungicide, herbicide
Premix
Flakes, flowable, wettable powder. Premix Parters: chlorpyrifos; lambda-cyhalothrin; cypermethrin; deltamethrin; dimethoate; methomyl; methyl parathion.
Physical Properties
Molecular weight:198.1. Physical form:Yellow crystals (pure DNOC, but not tech., is explosive when dry). Density:1.58 (20 °C); Composition:Tech. is 95-98% pure. Melting point:88.2-89.9 °C; ( tech., 83-85 °C); Vapour pressure:16 mPa (25 °C); Henry constant:2.41×10-7 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = 0.08 ( pH 7); pKa:4.48 (20 °C); Solubility:In water 6.94 g/l (20 °C, pH 7). In toluene 251, methanol 58.4, hexane 4.03, ethyl acetate 338, acetone 514, dichloromethane 503 (all in g/l, 20 °C). The sodium, potassium, calcium, and ammonium salts are readily soluble in water.; Stability:In water, DNOC degrades very slowly, DT50 >1 y. Photolysis DT50 c. 253 h (20 °C). Soluble in most organic solvents.
Toxicology
Oral:Acute oral LD50 for rats 25-40 mg/kg, mice 16-47 mg/kg, goats 100 mg/kg, cats 50 mg/kg; for sheep 200 mg DNOC-sodium/ kg. Percutaneous:Acute percutaneous LD50 for rats 200-600, rabbits 1000, mice 187 mg/kg. Skin irritant. Dangerous amounts can be absorbed through the skin. Phytotoxicity:Very phytotoxic. ADI:( EPA) 0.002 mg/kg.
Environmental Profile
Ecotoxicology: 
Algae: LC50 (96 h) 6 mg/l.Bees: LD50 1.79-2.29 mg/bee; moderate to low toxicity under field conditions.Birds: LD50 for Japanese quail 15.7 mg/kg (14 d), ducks 23, partridges 20-25, pheasants 6-85 mg/kg. LC50 for Japanese quail 637 mg/kg. Daphnia: LC50 (24 h) 5.7 mg/l.Fish: LC50 for carp 6-13, trout 0.45, bluegill sunfish 0.95 mg/l.Worms: LC50 (14 d) for earthworms 15 mg/kg soil. 
Environmental fate: 
Animals:In mammals, following oral administration, DNOC undergoes metabolism, and is eliminated as the glucuronide conjugate and as 2-methyl-4,6-diaminophenol. 50 in humans c. 150 h ( est., Jastroch DT50 in soil 0.1-12 d (20 °C), 15 d (5 °C). In water, DT50 3-5 w (20 °C).Plant:In plants, the nitro groups are reduced to amino groups.
WATER SOLUBILITY: 0.013% at 15°C.
Transport Information
Signal Word:DANGER; Hazard Class:Ib (Highly hazardous)

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