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Pharmacopeial Impurities (EP / USP / BP)

Naproxen EP Impurity E

Reference StandardAvailable on request

Buy Naproxen EP Impurity E (CAS 26159-35-3) from Zemixal: C15H16O3, COA and SDS with every lot, worldwide shipping. Catalogue no. ZX-022232.

Pack sizes
Naproxen EP Impurity E chemical structure
CAS number26159-35-3
FormulaC15H16O3
Molar mass244.28 g/mol
Physical formSolid
HS code38229090
InChIKeyZFYFBPCRUQZGJE-JTQLQIEISA-N
IUPAC namemethyl (2S)-2-(6-methoxynaphthalen-2-yl)propanoate

About Naproxen EP Impurity E

Naproxen EP Impurity E belongs to the Naproxen reference-standard family in the Zemixal catalogue. Identity at a glance (Reference Standard): CAS 26159-35-3, formula C15H16O3 and molar mass 244.28 g/mol. It is handled as a solid.

Common uses in the lab and plant

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

Safe handling

Classified under GHS with signal word Danger and hazard statements H301, H302, H315 and H319. Read the SDS before first use.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and custom quantities are quoted on request. 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 Naproxen

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

Naproxen 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 Naproxen EP Impurity E
Product nameNaproxen EP Impurity E
Catalogue numberZX-022232
CAS number26159-35-3
IUPAC namemethyl (2S)-2-(6-methoxynaphthalen-2-yl)propanoate
Molecular formulaC15H16O3
Molar mass244.28 g/mol
Exact mass244.1099
GradeReference Standard
Physical formSolid
XLogP33.1
H-bond donors / acceptors0 / 3
Topological polar surface area35.5 Ų
HS code38229090
InChIKeyZFYFBPCRUQZGJE-JTQLQIEISA-N
SMILESC[C@@H](C1=CC2=C(C=C1)C=C(C=C2)OC)C(=O)OC
PubChem CID9899603
SynonymsNaproxen Sodium impurity E, Naproxen - Impurity E, Naproxen Methyl Ester, (S)-Naproxen Methyl Ester, (+)-Naproxen Methyl Ester, 2-Naphthaleneacetic acid, 6-methoxy-alpha-methyl-, methyl ester, (alphaS)-, Naproxen impurity E, (S)-Methyl 2-(6-methoxynaphthalen-2-yl)propanoate, Methyl (S)-2-(6-Methoxynaphthalen-2-yl)propanoate, (S)-Methyl2-(6-methoxynaphthalen-2-yl)propanoate, Methyl (2S)-2-(6-Methoxynaphthalen-2-yl)propanoate (Naproxen Methyl Ester), Monomethyl derivative of Naproxen

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

Safety and GHS hazards

GHS06 Acute toxicity
Acute toxicity
GHS07 Irritant or harmful
Irritant or harmful
GHS08 Health hazard
Health hazard
GHS09 Hazardous to the environment
Hazardous to the environment

Signal word Danger

  • H301Toxic if swallowed
  • H302Harmful if swallowed
  • H315Causes skin irritation
  • H319Causes serious eye irritation
  • H335May cause respiratory irritation
  • H360May damage fertility or the unborn child
  • H411Toxic to aquatic life with long lasting effects

Precautionary statements P203, P261, P264, P264 + P265, P270, P271, P273, P280, P301 + P316, P301 + P317, P302 + P352, P304 + P340, P305 + P351 + P338, P318, P319, P321, P330, P332 + P317, P337 + P317, P362 + P364, P391, 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 Naproxen 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 Naproxen EP Impurity E

Which CAS number identifies Naproxen EP Impurity E?
Naproxen EP Impurity E is registered under CAS 26159-35-3. You may also see it listed as Naproxen Sodium impurity E, Naproxen - Impurity E, Naproxen Methyl Ester. Our catalogue number for this item is ZX-022232.
What are the formula and molar mass of Naproxen EP Impurity E?
For Naproxen EP Impurity E, its formula is C15H16O3 and its molar mass is 244.28 g/mol. The systematic (IUPAC) name is methyl (2S)-2-(6-methoxynaphthalen-2-yl)propanoate. InChIKey ZFYFBPCRUQZGJE-JTQLQIEISA-N lets you match it in any structure database.
How is Naproxen EP Impurity E used in pharmaceutical QC?
Naproxen EP Impurity E is a characterised reference material linked to Naproxen. 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 Naproxen 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 Naproxen 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 Naproxen EP Impurity E to my country?
Yes. Because Naproxen 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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