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Hymexazol

1- Development
2- Physical and Chemical Properties
3- Acute Toxicity
4- Formulations contain this active ingredient
5- Toxicity classification

6- First Aid

7- Exposure Guidelines
Development
Fungicidal properties reported by I. Iwai & N. Nakamura (Chem. Pharm. Bull., 1966, 14, 1277); chemistry, biological properties and toxicology reviewed by K. Tomita et al. (Sankyo Kenkyusho Nempo, 1973, 25, 1). Introduced by Sankyo Co., Ltd. in Japan in 1969.
Physical and Chemical Properties
Chemical class
Isoxazole
Belong to
List No. I
Chemical structure
Hymexazol chemical structure
CAS RN

[10004-44-1]

Chemical Abstract Name

5-methyl-3(2H)-isoxazolone (C.A.preferred tautomer) 

IUPAC name

5-methylisoxazol-3-ol 

Chemical fomula
C4H5NO2
Form
Tech. forms colourless crystals.
Melting Point
86-87 ºC 
Henry's Constant
2.77 x 10-4 Pa m3 mol-1 (calc.)
Vapour Pressure

182 mPa (25 ºC) 

Specific Denisty
0.551
Solubility
In water 65.1 (pure), 58.2 (pH 3), 67.8 (pH 9) (all in g/l, 20 °C). In acetone 730, dichloromethane 602, ethyl acetate 437, hexane 12.2, methanol 968, toluene 176 (all in g/l, 20 °C).
Stability
Stable under alkaline conditions, and relatively stable under acidic conditions. Stable to light and heat.
Acute toxicity
Oral LD50  mg/kg bwt.
Animal
Male
Female
Rat
4678
3909
Mice
2148
1968
rabbite
 
Dermal LD50 mg/kg bwt.
Animal
Male
Female
Rat
>10 000
>10 000
Gonia big
 
rabbite
>2000
Formulations contain this active ingredient
Trade name
registration No
Hymexate 30% SL 1058
Tachigaren 30% SL 687
Toxicity classification
WHO Classification U

Definition

Product unlikely to present acute hazard in normal use
color code Green
First Aid
IF ON SKIN OR CLOTHING: Take off contaminated clothing. Rinse skin immediately with plenty of water for 15-20 minutes. Call a poison control center or doctor for treatment advice.
IF IN EYES:  Hold eye open and rinse slowly and gently with water for 15-20 minutes. Remove contact lenses, if present, after first 5 minutes, then continue rinsing eyes. Call a poison control center or doctor for treatment advice.
IF SWALLOWED:  Call a poison control center or doctor immediately for treatment advice. Have person sip a glass of water if able to swallow. Do not induce vomiting unless told to do so by a poison control center or doctor. Do not give anything by mouth to an unconscious person.
IF INHALED:   Move person to fresh air. If person is not breathing, call anambulance, then give artificial respiration, preferably mouth-to-mouth if possible. Call poison control center or doctor for further treatment advice.
 
Exposure Guidelines:
ADI:  
RfD: 
 
Ministry of AgricultureCAPL
 

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