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
More
Less

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)
More
Less

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
More
Less

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.

More
Less

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
More
Less

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

More
Less

5-Methyl-4-isoxazolecarboxylic acid Suppliers

Americas 1 Belgium 3 Canada 4 China 306 Europe 3 France 2 Germany 7 India 35 Japan 1 Slovakia 1 South Korea 1 Switzerland 2 Ukraine 2 United Kingdom 16 United States 53 Global 437
Pure Chemistry Scientific Inc.
Tel
001-857-928-2050 or 1-888-588-9418
Fax
001-617-206-9595
Email
sales@chemreagents.com
Country
United States
ProdList
10186
Advantage
62
BOC Sciences
Tel
1-631-485-4226; 16314854226
Email
info@bocsci.com
Country
United States
ProdList
14055
Advantage
65
HBCChem, Inc.
Tel
+1-510-219-6317
Fax
+1-650-486-1361
Email
sales@hbcchem.com
Country
United States
ProdList
10648
Advantage
60
BOC Sciences
Tel
16314854226
Email
info@bocsci.com
Country
United States
ProdList
9923
Advantage
65
Standardpharm Co. Ltd.
Tel
86-714-3992388
Email
overseasales1@yongstandards.com
Country
United States
ProdList
14332
Advantage
58
Cato Research Chemicals Inc.
Tel
020-81215950 4000-868-328
Email
customer@uwalab.com
Country
United States
ProdList
10404
Advantage
58
Alchem Pharmtech,Inc.
Tel
8485655694
Email
sales@alchempharmtech.com
Country
United States
ProdList
63687
Advantage
58
Aladdin Scientific
Tel
+1-+1(833)-552-7181
Email
sales@aladdinsci.com
Country
United States
ProdList
57505
Advantage
58
Synthonix Inc
Tel
--
Fax
--
Email
info@synthonix.com
Country
United States
ProdList
6872
Advantage
58
Alfa Chemistry
Tel
--
Fax
--
Email
info@Alfa-Chemistry.com
Country
United States
ProdList
6814
Advantage
0
Alichem Inc.
Tel
--
Fax
--
Email
sales@alichem.com
Country
United States
ProdList
6167
Advantage
58
Tyger Scientific Inc.
Tel
--
Fax
--
Email
sales@tygersci.com
Country
United States
ProdList
402
Advantage
58
Oakwood Products, Inc.
Tel
--
Fax
--
Email
sales@oakwoodchemical.com
Country
United States
ProdList
6193
Advantage
74
OChem Incorporation
Tel
--
Fax
--
Email
sales@ocheminc.com
Country
United States
ProdList
6501
Advantage
60
VWR International, LLC.
Tel
--
Fax
--
Email
@sargentwelch.com
Country
United States
ProdList
6262
Advantage
58
Advanced Chemical Intermediates Ltd.
Tel
--
Fax
--
Email
enquiries@acints.com
Country
United States
ProdList
4893
Advantage
58
SynQuest Laboratories, Inc.
Tel
--
Fax
--
Email
info@synquestlabs.com
Country
United States
ProdList
6871
Advantage
62
Riedel-de Haen AG
Tel
--
Fax
--
Country
United States
ProdList
6773
Advantage
87
TCI America
Tel
--
Fax
--
Email
sales@tciamerica.com
Country
United States
ProdList
6909
Advantage
75
Frontier Scientific, Inc.
Tel
--
Fax
--
Email
sales@frontiersci.com
Country
United States
ProdList
6222
Advantage
86
Matrix Scientific
Tel
--
Fax
--
Email
sales@matrixscientific.com
Country
United States
ProdList
6632
Advantage
80
Synthonix
Tel
--
Fax
--
Email
info@synthonix.com
Country
United States
ProdList
1423
Advantage
68
HBCChem Inc.
Tel
--
Fax
--
Email
sales@hbcchem-inc.com
Country
United States
ProdList
4569
Advantage
30
HDH Pharma, Inc.
Tel
--
Fax
--
Email
catalog@hdhpharma.com
Country
United States
ProdList
6248
Advantage
62
Rintech, Inc.
Tel
--
Fax
--
Email
info@rintechinc.com
Country
United States
ProdList
3416
Advantage
60
3B Scientific Corporation
Tel
--
Fax
--
Email
sales@3bsc.com
Country
United States
ProdList
6962
Advantage
56
Carbocore, Inc.
Tel
--
Fax
--
Email
sales@carbocore.com
Country
United States
ProdList
1436
Advantage
60
AlliChem, LLC
Tel
--
Fax
--
Email
sales@allichemllc.com
Country
United States
ProdList
6516
Advantage
60
Combi-Blocks Inc.
Tel
--
Fax
--
Email
sales@combi-blocks.com
Country
United States
ProdList
6618
Advantage
69
Medical Isotopes
Tel
--
Fax
--
Email
stohler@medicalisotopes.com
Country
United States
ProdList
6181
Advantage
68
Ryan Scientific, Inc.
Tel
--
Fax
--
Email
ryan.reichlyn@ryansci.com
Country
United States
ProdList
6439
Advantage
60
INDOFINE Chemical Company, Inc.
Tel
--
Fax
--
Email
chemical@indofinechemical.com
Country
United States
ProdList
6176
Advantage
69
Sinova Inc.
Tel
--
Fax
--
Email
sales@sinovainc.com
Country
United States
ProdList
4009
Advantage
58
Alfa Aesar
Tel
--
Fax
--
Email
tech@alfa.com
Country
United States
ProdList
6814
Advantage
81
Waterstone Technology, LLC
Tel
--
Fax
--
Email
sales@waterstonetech.com
Country
United States
ProdList
6786
Advantage
30
API, Inc.
Tel
--
Fax
--
Email
HenryNiemczyk@apiincnj.com
Country
United States
ProdList
118
Advantage
30
HONEST JOY HOLDINGS LIMITED
Tel
--
Fax
--
Email
sales@honestjoy.cn
Country
United States
ProdList
6675
Advantage
54
2A PharmaChem USA
Tel
--
Fax
--
Email
sales@2apharmachem.com
Country
United States
ProdList
6137
Advantage
39
3B Scientific Corporation
Tel
--
Fax
--
Email
sales@3bsc.com
Country
United States
ProdList
6718
Advantage
47
Bio-Vin Research Laboratories
Tel
--
Fax
--
Email
sales@biovinresearch.com
Country
United States
ProdList
6210
Advantage
64
CiVentiChem
Tel
--
Fax
--
Email
debra@cvchem.com
Country
United States
ProdList
1340
Advantage
55
BOSCHE SCIENTIFIC, LLC
Tel
--
Fax
--
Email
Sales@BoscheSci.com
Country
United States
ProdList
6477
Advantage
55
Biogene Organics Inc.
Tel
--
Fax
--
Email
sales@biogeneorganics.com
Country
United States
ProdList
1119
Advantage
39
American Custom Chemicals Corporation
Tel
--
Fax
--
Email
sales@acccorporation.com
Country
United States
ProdList
6820
Advantage
51
ChemPacific Corporation
Tel
--
Fax
--
Email
sales@chempacific.com
Country
United States
ProdList
6891
Advantage
51
Aagile Labs Division of Tyger Scientific
Tel
--
Fax
--
Email
tygersci@yahoo.com
Country
United States
ProdList
6568
Advantage
68
TimTec Corporation
Tel
--
Fax
--
Email
info@timtec.net
Country
United States
ProdList
6891
Advantage
68
AB Chem Technologies, LLC
Tel
--
Fax
--
Email
sales@abchemtech.com
Country
United States
ProdList
1101
Advantage
46
AK Scientific, Inc.
Tel
--
Fax
--
Email
sales@aksci.com
Country
United States
ProdList
6347
Advantage
65
Beta Pharma, Inc.
Tel
--
Fax
--
Email
sales@betapharma.com
Country
United States
ProdList
6226
Advantage
60
More
Less

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

  • 5-Methyl-4-isoxazolecarboxylic acid, Tech.
  • 5-methylisoxazole-4-carboxylic acid(SALTDATA: FREE)
  • Methylisoxazole-4-carboxylic
  • LeflunoMide EP IMpurity D
  • 4-Carboxy-5-methylisoxazole ,4-Carboxy-5-methyl-1,2-oxazole
  • 5-Methylisoxazole-4-carboxylic acid, 99%, 99%
  • Leflunomide Impurity D
  • 5-Methyl-isoxazol-4-carboxylic acid
  • Leflunomide Impurity 4(Leflunomide EP Impurity D)
  • TIMTEC-BB SBB005909
  • 5-METHYLISOXAZOLE-4-CARBOXYLIC ACID
  • 5-METHYL-4-ISOXASOLECARBOXYLIC ACID
  • 5-METHYL-4-ISOXAZOLECARBOXYLIC ACID
  • 5-Methyl-4-Isooxazolecarboxylic Acid
  • 5-METHYLISOXAZOLE-4-CARBOXYLIC
  • 5-MethylIsoxazole-4-CarboxalicAcid,Leflunomide
  • 4-Isoxazolecarboxylic acid,5-Methyl
  • 5-METHYLISOXAZOLE-4-CARBOXYLIC ACID 98%
  • 5-Methylisoxazole-4-carboxylic acid, 98+%
  • Imp. D (EP):5-Methylisoxazole-4-carboxylic Acid
  • 5-Methylisoxazole-4-carboxylicAcid&gt
  • 5-Methyl-4-isoxazolecarboxylic acid ISO 9001：2015 REACH
  • 5-Methyl-4-isoxazolecarboxyl
  • 5-methylisoxazole-4-formic acid
  • Leflunomide EP Impurity D (5-Methylisoxazole-4-carboxylic Acid)
  • Lefluonamide Impurity D
  • Leflunomide impurities1343
  • 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
  • MethylisoChemicalbookxazole-4-carboxylic
  • 42831-50-5
  • 42931-50-5
  • C5H5NO3
  • C5H4NO3
  • CARBOXYLIC ACID
  • Heterocyclic Building Blocks
  • Isoxazoles
  • Building Blocks
  • Intermediates
  • Intermediates & Fine Chemicals
  • Pharmaceuticals
  • Isoxazoles, Oxadiazoles, Oxazoles
  • Acids and Derivatives
  • Heterocycles
  • Carboxylic Acids
  • Oxazoles, Isoxazoles & Benzoxazoles
  • Oxazole&Isoxazole
  • Organic acids
  • (intermediate of leflunomide)
  • Heterocyclic Compounds
  • Carboxylic Acids
  • Oxazoles, Isoxazoles & Benzoxazoles
  • Building Blocks
  • Heterocyclic Building Blocks
  • Isoxazoles