3-Hydroxy-5-methylisoxazole

About 3-Hydroxy-5-methylisoxazole

3-Hydroxy-5-methylisoxazole is a metabolite / degradant standard carrying the CAS registry number 10004-44-1. Its molecular formula is C4H5NO2 and its molecular weight is 99.09 g/mol. Systematically, it is named 5-methyl-1,2-oxazol-3-one. It is also known as Hymexazole or Hymexazol.

It is supplied as a solid. Store the standard in its sealed vial, protected from light and moisture, and follow the storage condition printed on the COA. It carries the GHS signal word “Danger” with 4 hazard statements. Review the Safety Data Sheet before use.

It is used in metabolite identification, stability-indicating method development and impurity profiling, as well as in QC testing and ANDA/DMF documentation. Typical end-use sectors are pharmaceutical manufacturing and academic and industrial research.

We offer 3-Hydroxy-5-methylisoxazole in 10 mg, 25 mg, 50 mg and 100 mg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Metabolite identification
Stability-indicating methods
Impurity profiling
Agrochemical formulations

Industries

Specifications & identifiers

Chemical identifiers
Product name	3-Hydroxy-5-methylisoxazole
Catalogue No.	VQ-038856
CAS Number	10004-44-1
IUPAC name	5-methyl-1,2-oxazol-3-one
Molecular formula	C₄H₅NO₂
Molecular weight	99.09 g/mol
Exact mass	99.032
Grade	Reference Standard
HSN code	38229090
InChIKey	KGVPNLBXJKTABS-UHFFFAOYSA-N
SMILES	CC1=CC(=O)NO1
PubChem CID	24781

Physical properties
Physical form	Solid
LogP (XLogP3)	0.1
H-bond donors / acceptors	1 / 2
TPSA	38.3 Å²
Synonyms	Hymexazole, Hymexazol, 5-Methylisoxazol-3-ol, 5-Methyl-3-hydroxyisoxazole, 5-methylisoxazol-3-one, RTY-319, 5-methylisoxazol-3(2H)-one, 3(2H)-Isoxazolone, 5-methyl-, 5-Methyl-isoxazol-3-ol, 3-Isoxazolol, 5-methyl-, Hydroxyisoxazole (pesticide), Isoxazole, 3-hydroxy-5-methyl-

Safety & hazard information (GHS)

Corrosive

Harmful / irritant

Health hazard

Environmental hazard

Signal word: Danger

Hazard statements

H302Harmful if swallowed
H317May cause an allergic skin reaction
H318Causes serious eye damage
H411Toxic to aquatic life with long lasting effects

Precautionary statements: P203, P261, P264, P264 + P265, P270, P272, P273, P280, P301 + P317, P302 + P352, P305 + P354 + P338, P317, P318, P321, P330, P333 + P317, P362 + P364, P391, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of 3-Hydroxy-5-methylisoxazole?

The CAS Registry Number of 3-Hydroxy-5-methylisoxazole is 10004-44-1. It is also known as Hymexazole, Hymexazol, 5-Methylisoxazol-3-ol.

What is the molecular formula and molecular weight of 3-Hydroxy-5-methylisoxazole?

3-Hydroxy-5-methylisoxazole has the molecular formula C4H5NO2 and a molecular weight of 99.09 g/mol. Its IUPAC name is 5-methyl-1,2-oxazol-3-one.

Which grade and pack sizes of 3-Hydroxy-5-methylisoxazole can I order?

We supply 3-Hydroxy-5-methylisoxazole in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with 3-Hydroxy-5-methylisoxazole?

Yes. Every lot of 3-Hydroxy-5-methylisoxazole is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can 3-Hydroxy-5-methylisoxazole be shipped internationally?

Yes. 3-Hydroxy-5-methylisoxazole is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.