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API Impurities

(E)-1,2-Bis(4-chlorophenyl)diazene

Reference StandardAvailable on request

(E)-1,2-Bis(4-chlorophenyl)diazene (CAS 21650-51-1) supplier Zemixal: C12H8Cl2N2, COA and SDS with every lot, worldwide shipping.

Pack sizes
(E)-1,2-Bis(4-chlorophenyl)diazene chemical structure
CAS number21650-51-1
FormulaC12H8Cl2N2
Molar mass251.11 g/mol
Physical formSolid
HS code38229090
InChIKeyXHQLXCFUPJSGOE-UHFFFAOYSA-N
IUPAC namebis(4-chlorophenyl)diazene

About (E)-1,2-Bis(4-chlorophenyl)diazene

Analytical teams working on Phenacetin use (E)-1,2-Bis(4-chlorophenyl)diazene as a qualified comparison standard. For your records (Reference Standard), the material is defined by CAS 21650-51-1, formula C12H8Cl2N2 and molar mass 251.11 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

Storage and safety notes

Hazard communication follows GHS (Warning: H302, H319 and H413). Our SDS lists exposure controls and first-aid measures.

Order it in 10 mg, 25 mg, 50 mg and 100 mg packs or ask for a bulk quotation. Every shipment includes a certificate of analysis with characterisation data. Request pricing online and we confirm availability, documentation and freight to your country.

Reference standards for Phenacetin

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

Phenacetin standards

Typical uses

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

Applications

Pharmaceutical Manufacturing and QCResearch Labs and Universities

Specifications and identifiers

Specifications of (E)-1,2-Bis(4-chlorophenyl)diazene
Product name(E)-1,2-Bis(4-chlorophenyl)diazene
Catalogue numberZX-046050
CAS number21650-51-1
IUPAC namebis(4-chlorophenyl)diazene
Molecular formulaC12H8Cl2N2
Molar mass251.11 g/mol
Exact mass250.0065
GradeReference Standard
Physical formSolid
XLogP35.3
H-bond donors / acceptors0 / 2
Topological polar surface area24.7 Ų
HS code38229090
InChIKeyXHQLXCFUPJSGOE-UHFFFAOYSA-N
SMILESC1=CC(=CC=C1N=NC2=CC=C(C=C2)Cl)Cl
PubChem CID15340
Synonyms1,2-Bis(4-chlorophenyl)diazene, Diazene, bis(4-chlorophenyl)-, p,p'-Dichloroazobenzene, Azobenzene, 4,4'-dichloro-, Diazene, 1,2-bis(4-chlorophenyl)-, p,p'Dichloroazobenzene, Azobenzene, 4,4'dichloro, Diazene, bis(4chlorophenyl), Diazene, bis(4-chlorophenyl)-(9CI), Bis-(4-chloro-phenyl)-diazene, (E)-bis(4-chlorophenyl)diazene

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

  • H302Harmful if swallowed
  • H319Causes serious eye irritation
  • H413May cause long lasting harmful effects to aquatic life

Precautionary statements P264, P264 + P265, P270, P273, P280, P301 + P317, P305 + P351 + P338, P330, P337 + P317, 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 (E)-1,2-Bis(4-chlorophenyl)diazene
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 (E)-1,2-Bis(4-chlorophenyl)diazene

Which CAS number identifies (E)-1,2-Bis(4-chlorophenyl)diazene?
(E)-1,2-Bis(4-chlorophenyl)diazene is registered under CAS 21650-51-1. You may also see it listed as 1,2-Bis(4-chlorophenyl)diazene, Diazene, bis(4-chlorophenyl)-, p,p'-Dichloroazobenzene. Our catalogue number for this item is ZX-046050.
What are the formula and molar mass of (E)-1,2-Bis(4-chlorophenyl)diazene?
For (E)-1,2-Bis(4-chlorophenyl)diazene, its formula is C12H8Cl2N2 and its molar mass is 251.11 g/mol. The systematic (IUPAC) name is bis(4-chlorophenyl)diazene. InChIKey XHQLXCFUPJSGOE-UHFFFAOYSA-N lets you match it in any structure database.
How is (E)-1,2-Bis(4-chlorophenyl)diazene used in pharmaceutical QC?
(E)-1,2-Bis(4-chlorophenyl)diazene is a characterised reference material linked to Phenacetin. 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 (E)-1,2-Bis(4-chlorophenyl)diazene?
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 (E)-1,2-Bis(4-chlorophenyl)diazene?
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 (E)-1,2-Bis(4-chlorophenyl)diazene to my country?
Yes. Because (E)-1,2-Bis(4-chlorophenyl)diazene 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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