4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol

Name: 4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol
Brand: Zemixal
SKU: ZX-031741

Reference StandardAvailable on request

Buy 4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol (CAS 181696-73-1) from Zemixal: C16H15NO2, COA and SDS with every lot, worldwide shipping.

Pack sizes

4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol chemical structure

CAS number181696-73-1

FormulaC₁₆H₁₅NO₂

Molar mass253.29 g/mol

Physical formSolid

HS code38229090

InChIKeyLOFHVOCXHGAVHL-UHFFFAOYSA-N

IUPAC name5-methyl-3,4-diphenyl-4H-1,2-oxazol-5-ol

About 4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol

Analytical teams working on Parecoxib use 4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol as a qualified comparison standard. For your records (Reference Standard), the material is defined by CAS 181696-73-1, formula C16H15NO2 and molar mass 253.29 g/mol. It is handled as a solid.

Use cases we see most often

Analytical method development
Method validation (AMV)
QC release testing
ANDA / DMF filings

Handling and storage

Hazard communication follows GHS (Warning: H317). Our SDS lists exposure controls and first-aid measures.

Available as 10 mg, 25 mg, 50 mg and 100 mg. Larger or split packs can be arranged. You receive a certificate of analysis with characterisation data with each order. Request pricing online and we confirm availability, documentation and freight to your country.

Reference standards for Parecoxib

See every impurity, metabolite and related compound we list for this API.

Parecoxib standards

Typical uses

Analytical method development
Method validation (AMV)
QC release testing
ANDA / DMF filings

Applications

Pharmaceutical Manufacturing and QC Research Labs and Universities

Specifications and identifiers

Specifications of 4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol
Product name	4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol
Catalogue number	ZX-031741
CAS number	181696-73-1
IUPAC name	5-methyl-3,4-diphenyl-4H-1,2-oxazol-5-ol
Molecular formula	C₁₆H₁₅NO₂
Molar mass	253.29 g/mol
Exact mass	253.1103
Grade	Reference Standard
Physical form	Solid
XLogP3	3.1
H-bond donors / acceptors	1 / 3
Topological polar surface area	41.8 Å²
HS code	38229090
InChIKey	LOFHVOCXHGAVHL-UHFFFAOYSA-N
SMILES	CC1(C(C(=NO1)C2=CC=CC=C2)C3=CC=CC=C3)O
PubChem CID	10777254
Synonyms	5-Methyl-3,4-diphenyl-4,5-dihydro-1,2-oxazol-5-ol, 5-Isoxazolol, 4,5-dihydro-5-methyl-3,4-diphenyl-, 5-Isoxazolol,4,5-dihydro-5-methyl-3,4-diphenyl-, Parecoxib-001, 5-Hydroxy-5-methyl-3,4-diphenylisoxazoline, 3,4-diphenyl4-hydrido-5-hydroxy-5-methylisoxazole, (5S)-5-Methyl-3,4-diphenyl-4,5-dihydroisoxazol-5-ol

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

Irritant or harmful

Signal word Warning

H317May cause an allergic skin reaction

Precautionary statements P261, P272, P280, P302 + P352, P321, P333 + P317, P362 + P364, P501

Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.

Pack sizes

Pack sizes of 4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol
10 mg	Quoted on request
25 mg	Quoted on request
50 mg	Quoted on request
100 mg	Quoted on request

Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.

Questions about 4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol

Which CAS number identifies 4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol?

4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol is registered under CAS 181696-73-1. You may also see it listed as 5-Methyl-3,4-diphenyl-4,5-dihydro-1,2-oxazol-5-ol, 5-Isoxazolol, 4,5-dihydro-5-methyl-3,4-diphenyl-, 5-Isoxazolol,4,5-dihydro-5-methyl-3,4-diphenyl-. Our catalogue number for this item is ZX-031741.

What are the formula and molar mass of 4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol?

For 4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol, its formula is C16H15NO2 and its molar mass is 253.29 g/mol. The systematic (IUPAC) name is 5-methyl-3,4-diphenyl-4H-1,2-oxazol-5-ol. InChIKey LOFHVOCXHGAVHL-UHFFFAOYSA-N lets you match it in any structure database.

How is 4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol used in pharmaceutical QC?

4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol is a characterised reference material linked to Parecoxib. Laboratories use it to identify and quantify this impurity during method development and validation, stability work, batch release testing and regulatory submissions.

What grade and pack sizes are available for 4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol?

This listing is Reference Standard grade. Standard packs are 10 mg, 25 mg, 50 mg, 100 mg. Larger quantities and custom packing can be quoted on request.

Which documents come with 4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol?

Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.

Can Zemixal ship 4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol to my country?

Yes. Because 4,5-Dihydro-5-methyl-3,4-diphenyl-5-isoxazolol is classed as hazardous, it travels in UN-approved packaging as dangerous goods under IATA or IMDG rules, with the export paperwork your broker needs.

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