5-Methylisoxazole-4-carboxylic acid, 98+%, Thermo Scientific™

Description

This Thermo Scientific brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific.

Specifications

Chemical Identifiers

• CAS: 42831-50-5
• Molecular Formula: C5H4NO3
• Molecular Weight (g/mol): 126.09
• MDL Number: MFCD00955655
• InChI Key: VQBXUKGMJCPBMF-UHFFFAOYSA-M
• Synonym: 5-methylisoxazole-4-carboxylic acid, 5-methyl-4-isoxazolecarboxylic acid, unii-bl2q213q2m, 4-isoxazolecarboxylic acid, 5-methyl, 5-methylisoxazole-4-carboxylicacid, leflunomide impurity d ep, pubchem8652, leflunomide impurity d, acmc-209jr8, ksc235o3b
• PubChem CID: 1425240
• SMILES: CC1=C(C=NO1)C([O-])=O

• Melting Point: 144°C to 149°C
• Quantity: 25 g
• Beilstein: 116000
• IUPAC Name: 5-methyl-1,2-oxazole-4-carboxylic acid
• Formula Weight: 127.1
• Percent Purity: ≥98%
• Chemical Name or Material: 5-Methylisoxazole-4-carboxylic acid

Safety and Handling

Hazard Category	H315-H319-H335
Hazard Statement	GHS H Statement H315-H319-H335 Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Precautionary Statement	P261-P264b-P271-P280-P302+P352-P304+P340-P305+P351+P338-P312-P332+P313-P362-P501c
EINECSNumber	000-000-0
TSCA	No
Recommended Storage	Ambient temperatures

SDS