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Pharmacopeial Impurities (EP / USP / BP)

Doxazosin EP Impurity E

Reference StandardAvailable on request

Order Doxazosin EP Impurity E (CAS 27631-29-4) online at Zemixal. Lab and bulk packs, batch COA, fast global delivery. Catalogue no. ZX-024354.

Pack sizes
Doxazosin EP Impurity E chemical structure
CAS number27631-29-4
FormulaC10H8Cl2N2O2
Molar mass259.09 g/mol
Physical formSolid
HS code38229090
InChIKeyDGHKCBSVAZXEPP-UHFFFAOYSA-N
IUPAC name2,4-dichloro-6,7-dimethoxyquinazoline

About Doxazosin EP Impurity E

Doxazosin EP Impurity E is supplied by Zemixal as a characterised reference material for Doxazosin analysis. Key data (Reference Standard): CAS 27631-29-4, formula C10H8Cl2N2O2 and molar mass 259.09 g/mol. It is handled as a solid.

Typical applications

  • Pharmacopeial method verification
  • Impurity profiling
  • QC release testing
  • ANDA / DMF filings

Storage and safety notes

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. You receive a certificate of analysis with characterisation data with each order. Send an enquiry through the quote panel and you get a formal offer with Incoterms and delivery time.

Reference standards for Doxazosin

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

Doxazosin standards

Typical uses

  • Pharmacopeial method verification
  • Impurity profiling
  • QC release testing
  • ANDA / DMF filings

Applications

Pharmaceutical Manufacturing and QCResearch Labs and Universities

Grade guides

Ph. Eur. Grade (European Pharmacopoeia)

Specifications and identifiers

Specifications of Doxazosin EP Impurity E
Product nameDoxazosin EP Impurity E
Catalogue numberZX-024354
CAS number27631-29-4
IUPAC name2,4-dichloro-6,7-dimethoxyquinazoline
Molecular formulaC10H8Cl2N2O2
Molar mass259.09 g/mol
Exact mass257.9963
GradeReference Standard
Physical formSolid
XLogP33.4
H-bond donors / acceptors0 / 4
Topological polar surface area44.2 Ų
HS code38229090
InChIKeyDGHKCBSVAZXEPP-UHFFFAOYSA-N
SMILESCOC1=C(C=C2C(=C1)C(=NC(=N2)Cl)Cl)OC
PubChem CID520327
Synonyms2,4-Dichloro-6,7-dimethoxy-quinazoline, Doxazosin Mesylate - Impurity E, Quinazoline, 2,4-dichloro-6,7-dimethoxy-, Doxazosin impurity E, 2-Chloro-6,7-dimethoxyquinazolin-4-yl Chloride, Doxazosin mesilate impurity E, CS-M1592, Quinazoline,2,4-dichloro-6,7-dimethoxy-, 2,4-dichloro6,7-dimethoxyquinazoline, 2,4-dichloro-6,7-dimetoxyquinazoline, 2.4-Dichloro-6,7-dimethoxy quinazoline

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 Doxazosin EP Impurity E
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 Doxazosin EP Impurity E

Which CAS number identifies Doxazosin EP Impurity E?
Doxazosin EP Impurity E is registered under CAS 27631-29-4. You may also see it listed as 2,4-Dichloro-6,7-dimethoxy-quinazoline, Doxazosin Mesylate - Impurity E, Quinazoline, 2,4-dichloro-6,7-dimethoxy-. Our catalogue number for this item is ZX-024354.
What are the formula and molar mass of Doxazosin EP Impurity E?
For Doxazosin EP Impurity E, its formula is C10H8Cl2N2O2 and its molar mass is 259.09 g/mol. The systematic (IUPAC) name is 2,4-dichloro-6,7-dimethoxyquinazoline. InChIKey DGHKCBSVAZXEPP-UHFFFAOYSA-N lets you match it in any structure database.
How is Doxazosin EP Impurity E used in pharmaceutical QC?
Doxazosin EP Impurity E is a characterised reference material linked to Doxazosin. 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 Doxazosin EP Impurity E?
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 Doxazosin EP Impurity E?
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 Doxazosin EP Impurity E to my country?
Yes. Because Doxazosin EP Impurity E 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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