ChemicalBook > CAS DataBase List > 5-Methyl-4-isoxazolecarboxylic acid

5-Methyl-4-isoxazolecarboxylic acid

Product Name
5-Methyl-4-isoxazolecarboxylic acid
CAS No.
42831-50-5
Chemical Name
5-Methyl-4-isoxazolecarboxylic acid
Synonyms
5-METHYLISOXAZOLE-4-CARBOXYLIC ACID;TIMTEC-BB SBB005909;Leflunomide Impurity D;Lefluonamide Impurity D;LeflunoMide EP IMpurity D;Leflunomide impurities1343;Methylisoxazole-4-carboxylic;5-Methyl-4-isoxazolecarboxyl;5-METHYLISOXAZOLE-4-CARBOXYLIC;5-methylisoxazole-4-formic acid
CBNumber
CB8342928
Molecular Formula
C5H5NO3
Formula Weight
127.1
MOL File
42831-50-5.mol
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5-Methyl-4-isoxazolecarboxylic acid Property

Melting point:
144-148 °C(lit.)
Boiling point:
308.3±22.0 °C(Predicted)
Density 
1.348±0.06 g/cm3(Predicted)
storage temp. 
Sealed in dry,Room Temperature
solubility 
DMSO (Slightly), Methanol (Slightly)
form 
Solid
pka
2.85±0.25(Predicted)
color 
White to Pale Brown
BRN 
116000
CAS DataBase Reference
42831-50-5(CAS DataBase Reference)
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Safety

Hazard Codes 
Xi,F
Risk Statements 
36/37/38-37/38-36-10
Safety Statements 
22-26-36/37/39-36-16
WGK Germany 
3
HazardClass 
IRRITANT
HS Code 
29349990
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405Store locked up.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
633771
Product name
5-Methylisoxazole-4-carboxylic acid
Purity
97%
Packaging
10g
Price
$162
Updated
2024/03/01
Sigma-Aldrich
Product number
633771
Product name
5-Methylisoxazole-4-carboxylic acid
Purity
97%
Packaging
1g
Price
$34.7
Updated
2023/06/20
TCI Chemical
Product number
M1740
Product name
5-Methylisoxazole-4-carboxylic Acid
Purity
>98.0%(T)(HPLC)
Packaging
5g
Price
$17
Updated
2024/03/01
TCI Chemical
Product number
M1740
Product name
5-Methylisoxazole-4-carboxylic Acid
Purity
>98.0%(T)(HPLC)
Packaging
25g
Price
$56
Updated
2024/03/01
Alfa Aesar
Product number
L14628
Product name
5-Methylisoxazole-4-carboxylic acid, 98+%
Packaging
5g
Price
$83.2
Updated
2021/12/16
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5-Methyl-4-isoxazolecarboxylic acid Chemical Properties,Usage,Production

Chemical Properties

Cream to brown Solid

Uses

5-Methylisoxazole-4-carboxylic Acid (Leflunomide EP Impurity D) is an intermediate for synthesis of Leflunomide (L322750). Herbicidal activities towards Digitaria ciliaris.

Flammability and Explosibility

Non flammable

5-Methyl-4-isoxazolecarboxylic acid Preparation Products And Raw materials

Raw materials

Preparation Products

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5-Methyl-4-isoxazolecarboxylic acid Suppliers

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View Lastest Price from 5-Methyl-4-isoxazolecarboxylic acid manufacturers

WUHAN FORTUNA CHEMICAL CO., LTD
Product
5-Methyl-4-isoxazolecarboxylic acid 42831-50-5
Price
US $0.00-0.00/Kg/Drum
Min. Order
1KG
Purity
99%min
Supply Ability
1000KGS
Release date
2021-11-08
R&D Scientific Inc.
Product
5-methylisoxazole-4-carboxylic acid 42831-50-5
Price
US $450.00/g
Min. Order
1g
Purity
97
Supply Ability
500 Kg
Release date
2024-02-19
Hangzhou ICH Biofarm Co., Ltd
Product
5-Methyl-4-isoxazolecarboxylic acid 42831-50-5
Price
US $0.00-0.00/kg
Min. Order
0.1kg
Purity
99.0%min
Supply Ability
2000kg
Release date
2023-06-09

42831-50-5, 5-Methyl-4-isoxazolecarboxylic acidRelated Search:

Methyl acrylate Methyl acetate Bensulfuron methyl 2-(Trifluoromethyl)benzoic acid 4-(Aminomethyl)benzoic acid m-Toluic acid o-Toluic acid 4-(Chloromethyl)benzoic acid Kresoxim-methyl 4-Bromomethylbenzoic acid p-Toluic acid Thiophanate-methyl Sulfamethoxazole Methylparaben 5-Methylisoxazole Methyl A77 1726 Leflunomide 3-Isomer

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  • 5-Methyl-4-isoxaze-4-carboxylic AcidQ: What is 5-Methyl-4-isoxaze-4-carboxylic Acid Q: What is the CAS Number of 5-Methyl-4-isoxaze-4-carboxylic Acid Q: What is the storage condition of 5-Methyl-4-isoxaze-4-carboxylic Acid Q: What are the applications of 5-Methyl-4-isoxaze-4-carboxylic Acid
  • CAS No.42831-50-5 5-Methyl-4-isoxazolecarboxylic acid
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  • C5H5NO3
  • C5H4NO3
  • CARBOXYLIC ACID
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