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Pharmacopeial Impurities (EP / USP / BP)

Methyldopa EP Impurity A

Reference StandardAvailable on request

Buy Methyldopa EP Impurity A (CAS 6739-31-7) from Zemixal. Request a quote with price, lead time and documents. Packs from 10 mg.

Pack sizes
Methyldopa EP Impurity A chemical structure
CAS number6739-31-7
FormulaC11H15NO4
Molar mass225.24 g/mol
Physical formSolid
HS code38229090
InChIKeyBQHWFYPBSKGBMV-NSHDSACASA-N
IUPAC name(2S)-2-amino-3-(4-hydroxy-3-methoxyphenyl)-2-methylpropanoic acid

About Methyldopa EP Impurity A

Zemixal lists Methyldopa EP Impurity A for laboratories that identify, quantify or control Methyldopa and its related substances. Identity at a glance (Reference Standard): CAS 6739-31-7, formula C11H15NO4 and molar mass 225.24 g/mol. It is handled as a solid.

Use cases we see most often

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

Storage and safety notes

Classified under GHS with signal word Warning and hazard statements H302 and H319. Read the SDS before first use.

Order it in 10 mg, 25 mg, 50 mg and 100 mg packs or ask for a bulk quotation. You receive a certificate of analysis with characterisation data with each order. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.

Reference standards for Methyldopa

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

Methyldopa 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 Methyldopa EP Impurity A
Product nameMethyldopa EP Impurity A
Catalogue numberZX-025575
CAS number6739-31-7
IUPAC name(2S)-2-amino-3-(4-hydroxy-3-methoxyphenyl)-2-methylpropanoic acid
Molecular formulaC11H15NO4
Molar mass225.24 g/mol
Exact mass225.1001
GradeReference Standard
Physical formSolid
XLogP3-2.2
H-bond donors / acceptors3 / 5
Topological polar surface area92.8 Ų
HS code38229090
InChIKeyBQHWFYPBSKGBMV-NSHDSACASA-N
SMILESC[C@](CC1=CC(=C(C=C1)O)OC)(C(=O)O)N
PubChem CID94331
Synonyms3-Methoxy-α-methyl-L-tyrosine, Methyldopa - Impurity A, 3-Methoxy-alpha-methyl-L-tyrosine, 3-O-Methylmethyldopa, 3-O-methyl-methyldopa, (S)-2-Amino-3-(4-hydroxy-3-methoxyphenyl)-2-methylpropanoic acid, 3-methoxy-, A-methyl-l-tyrosine, 3-O-methyl methyldopa, alpha,3-O-dimethyl-L-dopa, 3-Methoxy-alpha-methyltyrosine, Tyrosine, 3-methoxy-alpha-methyl-, L-

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

Precautionary statements P264, P264 + P265, P270, 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 Methyldopa EP Impurity A
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 Methyldopa EP Impurity A

Which CAS number identifies Methyldopa EP Impurity A?
Methyldopa EP Impurity A is registered under CAS 6739-31-7. You may also see it listed as 3-Methoxy-α-methyl-L-tyrosine, Methyldopa - Impurity A, 3-Methoxy-alpha-methyl-L-tyrosine. Our catalogue number for this item is ZX-025575.
What are the formula and molar mass of Methyldopa EP Impurity A?
For Methyldopa EP Impurity A, its formula is C11H15NO4 and its molar mass is 225.24 g/mol. The systematic (IUPAC) name is (2S)-2-amino-3-(4-hydroxy-3-methoxyphenyl)-2-methylpropanoic acid. InChIKey BQHWFYPBSKGBMV-NSHDSACASA-N lets you match it in any structure database.
How is Methyldopa EP Impurity A used in pharmaceutical QC?
Methyldopa EP Impurity A is a characterised reference material linked to Methyldopa. 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 Methyldopa EP Impurity A?
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 Methyldopa EP Impurity A?
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 Methyldopa EP Impurity A to my country?
Yes. Because Methyldopa EP Impurity A 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.

More Methyldopa standards

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