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CAS No 10004-44-1 , 5-methyl-1,2-oxazol-3-one

  • Name: 5-methyl-1,2-oxazol-3-one
  • Synonyms: Hymexazole; 5-Methylisoxazol-3-ol;Hymexazol;5-methyl-1,2-oxazol-3-one; Itachigarden; 3-Hydroxy-5-methylisoxazole; Hydroxyisoxazole; Tachigaren; 10004-44-1;
  • CAS Registry Number:
  • Transport: OTH
  • Melting Point: 86 - 87 C
  • Flash Point: 91.8 ºC
  • Boiling Point: 228.2 ºC at 760 mmHg
  • Density: 1.185 g/cm3
  • Refractive index: 1.467
  • Safety Statements: Moderately toxic by ingestion, subcutaneous and intravenous routes. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx.
  • Flash Point: 91.8 ºC
  • EINECS: 233-000-6
  • Molecular Weight: 99.088
  • InchiKey: KGVPNLBXJKTABS-UHFFFAOYSA-N
  • InChI: InChI=1S/C4H5NO2/c1-3-2-4(6)5-7-3/h2H,1H3,(H,5,6)
  • Risk Statements: 22-41-52/53
  • Molecular Formula: C4H5NO2
  • Molecular Structure:CAS No:10004-44-1 5-methyl-1,2-oxazol-3-one

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10004-44-1 HYMEXAZOL

  • Hong kong Advanced Technology & Industrial Co., Ltd. [Manufacturer]
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10004-44-1 XS00701 5-METHYLISOXAZOL-3(2H)-ONE

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10004-44-1 3-hydroxy-5-methylisoxazole

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10004-44-1 3-hydroxy-5-methylisoxazole

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10004-44-1 3-Hydroxy-5-methylisoxazole

  • Germany Karl H. Boddin Chemiehandel GmbH [Manufacturers]
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References of 5-methyl-1,2-oxazol-3-one
Title: Hymexazol
CAS Registry Number: 10004-44-1
CAS Name: 5-Methyl-3(2H)-isoxazolone
Synonyms: 3-hydroxy-5-methylisoxazole
Manufacturers' Codes: F-319; RTY-319
Trademarks: Tachigaren (Sankyo)
Molecular Formula: C4H5NO2
Molecular Weight: 99.09
Percent Composition: C 48.48%, H 5.09%, N 14.14%, O 32.29%
Literature References: Prepn: NL 6511925; I. Iwai et al., US 3544584 (1966, 1970 both to Sankyo); I. Iwai, N. Nakamura, Chem. Pharm. Bull. 14, 1277 (1966). Metabolism in plants: S. Kamimura et al., Phytopathology 64, 1273 (1974). Properties and analytical methods: T. Nakamura et al., Anal. Methods Pestic. Plant Growth Regul. 10, 215 (1978). GC determn in plants and soils: idem et al., Annu. Rep. Sankyo Res. Lab. 28, 130 (1976). Plant growth promoting activity: Y. Ota, Jpn. Agric. Res. Q. 9, 1 (1975). Mode of fungicidal action: T. Nakanishi, H. D. Sisler, J. Pestic. Sci. 8, 173 (1983). Field studies: P. A. Payne, G. E. Williams, Crop Prot. 9, 371 (1990). Series of articles on chemistry, biological activity and metabolism: Annu. Rep. Sankyo Res. Lab. 25, 1-51 (1973). Brief review: R. Ishitsuka, Jpn. Pestic. Inf. 18, 27-30 (1974).
Properties: White needles from n-hexane, mp 84-85°. Also reported as mp 86-87° (Nakamura, 1983). Vapor pressure (25°) 1.01 ′ 10-3 Torr. Soly at 25° (g/100 ml): ~8.5 in water. Very sol in methanol, ethanol, isopropanol, acetone, methyl isobutyl ketone, tetrahydrofuran, dioxane, DMF, ethylene glycol, chloroform. Fairly sol in diethyl ether, benzene, xylene, trichloroethylene. Slightly sol in n-hexane, carbon disulfide. LD50 in male, female mice, rats (mg/kg): 2148, 1968, 4678, 3909 orally; 1297, 1167, 1924, 1884 s.c.; 445, 514, >1000, >1000 i.v.; in rats, rabbits (mg/kg): >10000, >2000 dermally (Nakamura, 1978).
Melting point: mp 84-85°; mp 86-87° (Nakamura, 1983)
Toxicity data: LD50 in male, female mice, rats (mg/kg): 2148, 1968, 4678, 3909 orally; 1297, 1167, 1924, 1884 s.c.; 445, 514, >1000, >1000 i.v.; in rats, rabbits (mg/kg): >10000, >2000 dermally (Nakamura, 1978)
Use: Agricultural fungicide and plant growth regulator.