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API Impurities

5-Chloro-3H-2-benzofuran-1-one

Reference StandardAvailable on request

5-Chloro-3H-2-benzofuran-1-one (CAS 54109-03-4) supplier Zemixal: C8H5ClO2, COA and SDS with every lot, worldwide shipping.

Pack sizes
5-Chloro-3H-2-benzofuran-1-one chemical structure
CAS number54109-03-4
FormulaC8H5ClO2
Molar mass168.57 g/mol
Physical formSolid
HS code38229090
InChIKeyUBRQBEBBOSKYLQ-UHFFFAOYSA-N
IUPAC name5-chloro-3H-2-benzofuran-1-one

About 5-Chloro-3H-2-benzofuran-1-one

5-Chloro-3H-2-benzofuran-1-one belongs to the Escitalopram reference-standard family in the Zemixal catalogue. Key data (Reference Standard): CAS 54109-03-4, formula C8H5ClO2 and molar mass 168.57 g/mol. It is handled as a solid.

Common uses in the lab and plant

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

Safe handling

It carries the GHS signal word Warning (H315, H319 and H335), so wear gloves and eye protection and work with good ventilation.

Available as 10 mg, 25 mg, 50 mg and 100 mg. Larger or split packs can be arranged. Every shipment includes a certificate of analysis with characterisation data. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.

Reference standards for Escitalopram

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

Escitalopram standards

Typical uses

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

Applications

Specifications and identifiers

Specifications of 5-Chloro-3H-2-benzofuran-1-one
Product name5-Chloro-3H-2-benzofuran-1-one
Catalogue numberZX-034799
CAS number54109-03-4
IUPAC name5-chloro-3H-2-benzofuran-1-one
Molecular formulaC8H5ClO2
Molar mass168.57 g/mol
Exact mass167.9978
GradeReference Standard
Physical formSolid
XLogP31.4
H-bond donors / acceptors0 / 2
Topological polar surface area26.3 Ų
HS code38229090
InChIKeyUBRQBEBBOSKYLQ-UHFFFAOYSA-N
SMILESC1C2=C(C=CC(=C2)Cl)C(=O)O1
PubChem CID241737
Synonyms5-Chlorophthalide, 5-chloro-1,3-dihydro-2-benzofuran-1-one, 5-chloro-1-(3h)-isobenzofuranone, 5-chloro-1(3H)-isobenzofuranone, 5-chloro-2-benzofuran-1(3h)-one, 5-chloro-3H-isobenzofuran-1-one

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

Safety and GHS hazards

GHS07 Irritant or harmful
Irritant or harmful

Signal word Warning

  • 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 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 5-Chloro-3H-2-benzofuran-1-one
10 mgQuoted on request
25 mgQuoted on request
50 mgQuoted on request
100 mgQuoted on request

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

Questions about 5-Chloro-3H-2-benzofuran-1-one

Which CAS number identifies 5-Chloro-3H-2-benzofuran-1-one?
5-Chloro-3H-2-benzofuran-1-one is registered under CAS 54109-03-4. You may also see it listed as 5-Chlorophthalide, 5-chloro-1,3-dihydro-2-benzofuran-1-one, 5-chloro-1-(3h)-isobenzofuranone. Our catalogue number for this item is ZX-034799.
What are the formula and molar mass of 5-Chloro-3H-2-benzofuran-1-one?
For 5-Chloro-3H-2-benzofuran-1-one, its formula is C8H5ClO2 and its molar mass is 168.57 g/mol. The systematic (IUPAC) name is 5-chloro-3H-2-benzofuran-1-one. InChIKey UBRQBEBBOSKYLQ-UHFFFAOYSA-N lets you match it in any structure database.
How is 5-Chloro-3H-2-benzofuran-1-one used in pharmaceutical QC?
5-Chloro-3H-2-benzofuran-1-one is a characterised reference material linked to Escitalopram. 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 5-Chloro-3H-2-benzofuran-1-one?
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 5-Chloro-3H-2-benzofuran-1-one?
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 5-Chloro-3H-2-benzofuran-1-one to my country?
Yes. Because 5-Chloro-3H-2-benzofuran-1-one 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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