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Pharmacopeial Impurities (EP / USP / BP)

Carbidopa EP Impurity B

Reference StandardAvailable on request

Buy Carbidopa EP Impurity B (CAS 18181-08-3) from Zemixal. Request a quote with price, lead time and documents. Packs from 10 mg.

Pack sizes
Carbidopa EP Impurity B chemical structure
CAS number18181-08-3
FormulaC11H15NO4
Molar mass225.24 g/mol
Physical formSolid
HS code38229090
InChIKeyMKFJJXIMFTXSEM-NSHDSACASA-N
IUPAC namemethyl (2S)-2-amino-3-(3,4-dihydroxyphenyl)-2-methylpropanoate

About Carbidopa EP Impurity B

Zemixal lists Carbidopa EP Impurity B for laboratories that identify, quantify or control Carbidopa and its related substances. For your records (Reference Standard), the material is defined by CAS 18181-08-3, formula C11H15NO4 and molar mass 225.24 g/mol. It is handled as a solid.

Where it is used

  • 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+H312+H332, H302, H312 and H315. 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 Carbidopa

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

Carbidopa 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 Carbidopa EP Impurity B
Product nameCarbidopa EP Impurity B
Catalogue numberZX-021037
CAS number18181-08-3
IUPAC namemethyl (2S)-2-amino-3-(3,4-dihydroxyphenyl)-2-methylpropanoate
Molecular formulaC11H15NO4
Molar mass225.24 g/mol
Exact mass225.1001
GradeReference Standard
Physical formSolid
XLogP30.7
H-bond donors / acceptors3 / 5
Topological polar surface area92.8 Ų
HS code38229090
InChIKeyMKFJJXIMFTXSEM-NSHDSACASA-N
SMILESC[C@](CC1=CC(=C(C=C1)O)O)(C(=O)OC)N
PubChem CID28934
Synonymsα-Methyldopa Methyl Ester, Methyldopa Methyl Ester, Carbidopa Impurity B, Carbidopa - Impurity B, 3-Hydroxy-alpha-methyl-L-tyrosine methyl ester, Alpha-methyl-melevodopa, alpha-Methyldopa methyl ester, a-Methyldopa Methyl Ester, Methyl (S)-2-amino-3-(3,4-dihydroxyphenyl)-2-methylpropanoate, alpha-Methyl-3,4-dihydroxy-L-phenylalanine methyl ester, L-3-(3,4-Dihydroxyphenyl)-2-methylalanine methyl ester

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

  • H302+H312+H332Harmful if swallowed, in contact with skin or if inhaled
  • H302Harmful if swallowed
  • H312Harmful in contact with skin
  • H315Causes skin irritation
  • H319Causes serious eye irritation
  • H332Harmful if inhaled

Precautionary statements P261, P264, P264 + P265, P270, P271, P280, P301 + P317, P302 + P352, P304 + P340, P305 + P351 + P338, P317, P321, P330, P332 + P317, P337 + P317, P362 + P364, 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 Carbidopa EP Impurity B
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 Carbidopa EP Impurity B

Which CAS number identifies Carbidopa EP Impurity B?
Carbidopa EP Impurity B is registered under CAS 18181-08-3. You may also see it listed as α-Methyldopa Methyl Ester, Methyldopa Methyl Ester, Carbidopa Impurity B. Our catalogue number for this item is ZX-021037.
What are the formula and molar mass of Carbidopa EP Impurity B?
For Carbidopa EP Impurity B, its formula is C11H15NO4 and its molar mass is 225.24 g/mol. The systematic (IUPAC) name is methyl (2S)-2-amino-3-(3,4-dihydroxyphenyl)-2-methylpropanoate. InChIKey MKFJJXIMFTXSEM-NSHDSACASA-N lets you match it in any structure database.
How is Carbidopa EP Impurity B used in pharmaceutical QC?
Carbidopa EP Impurity B is a characterised reference material linked to Carbidopa. 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 Carbidopa EP Impurity B?
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 Carbidopa EP Impurity B?
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 Carbidopa EP Impurity B to my country?
Yes. Because Carbidopa EP Impurity B 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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