Chlorzoxazone

Name: Chlorzoxazone
Brand: Vaqora Chemicals
SKU: VQ-003996

About Chlorzoxazone

Chlorzoxazone is an analgesic / anti-inflammatory API (IP/BP/USP grade) carrying the CAS registry number 95-25-0. The compound has the formula C7H4ClNO2, corresponding to a molecular weight of 169.56 g/mol. Systematically, it is named 5-chloro-3H-1,3-benzoxazol-2-one. It is also known as 5-Chloro-2(3H)-benzoxazolone or 5-Chloro-2-benzoxazolone.

It is supplied as a white to off-white solid. Keep the container tightly sealed and store it in a cool, dry area. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

As an active pharmaceutical ingredient within our analgesic and anti-inflammatory APIs range, it is offered in IP/BP/USP grade for formulation development, generic drug programmes and commercial manufacturing. It is used across pharmaceutical manufacturing.

Vaqora Chemicals supplies Chlorzoxazone in 1 kg, 5 kg and 25 kg packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

Pharmaceutical formulation
Generic drug development

Industries

Related to Chlorzoxazone

View every impurity, metabolite and intermediate we list for Chlorzoxazone.

Chlorzoxazone impurities

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Chlorzoxazone
Catalogue No.	VQ-003996
CAS Number	95-25-0
IUPAC name	5-chloro-3H-1,3-benzoxazol-2-one
Molecular formula	C₇H₄ClNO₂
Molecular weight	169.56 g/mol
Exact mass	168.9931
Grade	IP/BP/USP
HSN code	2933
InChIKey	TZFWDZFKRBELIQ-UHFFFAOYSA-N
SMILES	C1=CC2=C(C=C1Cl)NC(=O)O2
PubChem CID	2733

Physical properties
Physical form	Solid
Appearance	White to off-white solid
LogP (XLogP3)	1.8
H-bond donors / acceptors	1 / 2
TPSA	38.3 Å²
Synonyms	5-Chloro-2(3H)-benzoxazolone, 5-Chloro-2-benzoxazolone, 2(3H)-Benzoxazolone, 5-chloro-, 5-Chloro-2-benzoxazolinone, 5-Chlorobenzoxazolidone, 5-Chloro-2-hydroxybenzoxazole, 5-Chloro-2-benzoxazolol, Parafon Forte DSC, Chlorzoxane, Strifon Forte Dsc, 2-Hydroxy-5-chlorobenzoxazole, 5-chlorobenzoxazolin-2-one

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P270, P271, P280, P301 + P317, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P330, 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

Other grades of CAS 95-25-0

Reference Standard

Chlorzoxazone WS

CAS: 95-25-0
Formula: C₇H₄ClNO₂
MW: 169.56 g/mol

In stock

Frequently asked questions

What is the CAS number of Chlorzoxazone?

The CAS Registry Number of Chlorzoxazone is 95-25-0. It is also known as 5-Chloro-2(3H)-benzoxazolone, 5-Chloro-2-benzoxazolone, 2(3H)-Benzoxazolone, 5-chloro-.

What is the molecular formula and molecular weight of Chlorzoxazone?

Chlorzoxazone has the molecular formula C7H4ClNO2 and a molecular weight of 169.56 g/mol. Its IUPAC name is 5-chloro-3H-1,3-benzoxazol-2-one.

What is Chlorzoxazone used for?

Chlorzoxazone is supplied as a characterised reference material related to Chlorzoxazone. 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 Chlorzoxazone can I order?

We supply Chlorzoxazone in IP/BP/USP grade, in 1 kg, 5 kg, 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Chlorzoxazone?

Yes. Every lot of Chlorzoxazone 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 Chlorzoxazone be shipped internationally?

Yes. Chlorzoxazone 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.