Benzo[d]isoxazole

Name: Benzo[d]isoxazole
Brand: Vaqora Chemicals
SKU: VQ-049652

About Benzo[d]isoxazole

Vaqora Chemicals supplies Benzo[d]isoxazole, a process intermediate or related compound of Ascorbic acid registered under CAS number 271-95-4. The compound has the formula C7H5NO, corresponding to a molecular weight of 119.12 g/mol. The IUPAC name is 1,2-benzoxazole. It is also known as 1,2-Benzisoxazole or Benz(d)isoxazole.

The product is provided 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 “Warning” with 3 hazard statements. Review the Safety Data Sheet before use.

It is a process intermediate or related compound in the synthesis of Ascorbic acid, useful for route development, impurity fate-and-purge studies and analytical method development. Typical end-use sectors are pharmaceutical manufacturing and academic and industrial research.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

API route development
Impurity fate & purge studies
Analytical method development

Industries

Related to Ascorbic acid

View every impurity, metabolite and intermediate we list for Ascorbic acid.

Ascorbic acid impurities

Specifications & identifiers

Chemical identifiers
Product name	Benzo[d]isoxazole
Catalogue No.	VQ-049652
CAS Number	271-95-4
IUPAC name	1,2-benzoxazole
Molecular formula	C₇H₅NO
Molecular weight	119.12 g/mol
Exact mass	119.0371
HSN code	2933
InChIKey	KTZQTRPPVKQPFO-UHFFFAOYSA-N
SMILES	C1=CC=C2C(=C1)C=NO2
PubChem CID	71073

Physical properties
Physical form	Solid
LogP (XLogP3)	1.6
H-bond donors / acceptors	0 / 2
TPSA	26 Å²
Synonyms	1,2-Benzisoxazole, Benz(d)isoxazole, Indoxazene, 4,5-Benzisoxazole, 1-Oxa-2-aza-1H-indene, 1,2-benzoisoxazole, Isoindoxazine, 4,5-Benzisoazole, 1-Oxa-2-azaindene

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, 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 Benzo[d]isoxazole?

The CAS Registry Number of Benzo[d]isoxazole is 271-95-4. It is also known as 1,2-Benzisoxazole, Benz(d)isoxazole, Indoxazene.

What is the molecular formula and molecular weight of Benzo[d]isoxazole?

Benzo[d]isoxazole has the molecular formula C7H5NO and a molecular weight of 119.12 g/mol. Its IUPAC name is 1,2-benzoxazole.

What is Benzo[d]isoxazole used for?

Benzo[d]isoxazole is supplied as a characterised reference material related to Ascorbic acid. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of Benzo[d]isoxazole can I order?

We supply Benzo[d]isoxazole, 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 Benzo[d]isoxazole?

Yes. Every lot of Benzo[d]isoxazole 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 Benzo[d]isoxazole be shipped internationally?

Yes. Benzo[d]isoxazole 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.