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API Impurities

(2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid

Reference StandardAvailable on request

Buy (2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid (CAS 20972-36-5) from Zemixal. Request a quote with price, lead time and documents.

Pack sizes
(2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid chemical structure
CAS number20972-36-5
FormulaC11H10O3
Molar mass190.19 g/mol
Physical formSolid
HS code38229090
InChIKeyVNJMEFZKYZHWEO-VOTSOKGWSA-N
IUPAC name(E)-4-(4-methylphenyl)-4-oxobut-2-enoic acid

About (2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid

Analytical teams working on Zolpidem use (2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid as a qualified comparison standard. Identity at a glance (Reference Standard): CAS 20972-36-5, formula C11H10O3 and molar mass 190.19 g/mol. It is handled as a solid.

Use cases we see most often

  • 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. You receive a certificate of analysis with characterisation data with each order. Request pricing online and we confirm availability, documentation and freight to your country.

Reference standards for Zolpidem

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

Zolpidem 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 (2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid
Product name(2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid
Catalogue numberZX-047878
CAS number20972-36-5
IUPAC name(E)-4-(4-methylphenyl)-4-oxobut-2-enoic acid
Molecular formulaC11H10O3
Molar mass190.19 g/mol
Exact mass190.063
GradeReference Standard
Physical formSolid
XLogP31.9
H-bond donors / acceptors1 / 3
Topological polar surface area54.4 Ų
HS code38229090
InChIKeyVNJMEFZKYZHWEO-VOTSOKGWSA-N
SMILESCC1=CC=C(C=C1)C(=O)/C=C/C(=O)O
PubChem CID691106
Synonyms3-(4-methylbenzoyl)acrylic acid, (E)-4-Oxo-4-(p-tolyl)but-2-enoic acid, 3-(4-Methyl benzoyl)acrylic acid, 2-Butenoic acid, 4-(4-methylphenyl)-4-oxo-, (2E)-, 4-(4-methylphenyl)-4-oxobut-2-enoic acid, (E)-4-(4-methylphenyl)-4-oxo-2-butenoic acid, (E)-4-Oxo-4-(p-tolyl)but-2-enoicacid, 3-(4-Methyl benzoyl)acrylic acid, AldrichCPR, (2E)-4-(4-methylphenyl)-4-oxobut-2-enoic acid compound with quinuclidine (1:1)

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 (2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid
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 (2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid

Which CAS number identifies (2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid?
(2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid is registered under CAS 20972-36-5. You may also see it listed as 3-(4-methylbenzoyl)acrylic acid, (E)-4-Oxo-4-(p-tolyl)but-2-enoic acid, 3-(4-Methyl benzoyl)acrylic acid. Our catalogue number for this item is ZX-047878.
What are the formula and molar mass of (2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid?
For (2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid, its formula is C11H10O3 and its molar mass is 190.19 g/mol. The systematic (IUPAC) name is (E)-4-(4-methylphenyl)-4-oxobut-2-enoic acid. InChIKey VNJMEFZKYZHWEO-VOTSOKGWSA-N lets you match it in any structure database.
How is (2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid used in pharmaceutical QC?
(2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid is a characterised reference material linked to Zolpidem. 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 (2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid?
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 (2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid?
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 (2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid to my country?
Yes. Because (2E)-4-(4-Methylphenyl)-4-oxobut-2-enoic acid 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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