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Pharmacopeial Impurities (EP / USP / BP)

Levothyroxine EP Impurity H (Stage -1)

Reference StandardIn stock

Buy Levothyroxine EP Impurity H (Stage -1) (CAS 118-97-8) from Zemixal: C7H3ClN2O6, COA and SDS with every lot, worldwide shipping.

Pack sizes
Levothyroxine EP Impurity H (Stage -1) chemical structure
CAS number118-97-8
FormulaC7H3ClN2O6
Molar mass246.56 g/mol
Physical formSolid
HS code38229090
InChIKeyPCTFIHOVQYYAMH-UHFFFAOYSA-N
IUPAC name4-chloro-3,5-dinitrobenzoic acid

About Levothyroxine EP Impurity H (Stage -1)

Levothyroxine EP Impurity H (Stage -1) belongs to the Levothyroxine reference-standard family in the Zemixal catalogue. Key data (Reference Standard): CAS 118-97-8, formula C7H3ClN2O6 and molar mass 246.56 g/mol. It is handled as a solid.

Typical applications

  • Pharmacopeial method verification
  • Impurity profiling
  • 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.

Standard pack sizes are 10 mg, 25 mg, 50 mg, 100 mg and 250 mg, and custom quantities are quoted on request. Each lot travels with a certificate of analysis with characterisation data. Request pricing online and we confirm availability, documentation and freight to your country.

Reference standards for Levothyroxine

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

Levothyroxine 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 Levothyroxine EP Impurity H (Stage -1)
Product nameLevothyroxine EP Impurity H (Stage -1)
Catalogue numberZX-005793
CAS number118-97-8
IUPAC name4-chloro-3,5-dinitrobenzoic acid
Molecular formulaC7H3ClN2O6
Molar mass246.56 g/mol
Exact mass245.968
GradeReference Standard
Physical formSolid
XLogP32.5
H-bond donors / acceptors1 / 6
Topological polar surface area129 Ų
HS code38229090
InChIKeyPCTFIHOVQYYAMH-UHFFFAOYSA-N
SMILESC1=C(C=C(C(=C1[N+](=O)[O-])Cl)[N+](=O)[O-])C(=O)O
PubChem CID8377
Synonyms3,5-Dinitro-4-chlorobenzoic acid, 4-Chloro-3,5-dinitrobenzenecarboxylic acid, Levothyroxine EP Impurity H ( Stage -1), Benzoic acid, 4-chloro-3,5-dinitro-, 4-Chloro-3,5-dinitrobenzoate, Benzoicacid, 4-chloro-3,5-dinitro-, 4-chloro-3,5-dinitro-benzoic acid, 3,5-Dinitro-4-chlorobenzoicacid, Bumetanide Impurity 17, 3,5-dinitro-4-chloro-benzoic acid, 4-Chloro-3,5-dinitrobenzoic acid, 97%

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 Levothyroxine EP Impurity H (Stage -1)
10 mgQuoted on request
25 mgQuoted on request
50 mgQuoted on request
100 mgQuoted on request
250 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 Levothyroxine EP Impurity H (Stage -1)

Which CAS number identifies Levothyroxine EP Impurity H (Stage -1)?
Levothyroxine EP Impurity H (Stage -1) is registered under CAS 118-97-8. You may also see it listed as 3,5-Dinitro-4-chlorobenzoic acid, 4-Chloro-3,5-dinitrobenzenecarboxylic acid, Levothyroxine EP Impurity H ( Stage -1). Our catalogue number for this item is ZX-005793.
What are the formula and molar mass of Levothyroxine EP Impurity H (Stage -1)?
For Levothyroxine EP Impurity H (Stage -1), its formula is C7H3ClN2O6 and its molar mass is 246.56 g/mol. The systematic (IUPAC) name is 4-chloro-3,5-dinitrobenzoic acid. InChIKey PCTFIHOVQYYAMH-UHFFFAOYSA-N lets you match it in any structure database.
How is Levothyroxine EP Impurity H (Stage -1) used in pharmaceutical QC?
Levothyroxine EP Impurity H (Stage -1) is a characterised reference material linked to Levothyroxine. 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 Levothyroxine EP Impurity H (Stage -1)?
This listing is Reference Standard grade. Standard packs are 10 mg, 25 mg, 50 mg, 100 mg, 250 mg. Larger quantities and custom packing can be quoted on request.
Which documents come with Levothyroxine EP Impurity H (Stage -1)?
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 Levothyroxine EP Impurity H (Stage -1) to my country?
Yes. Because Levothyroxine EP Impurity H (Stage -1) 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.

Other grades with CAS 118-97-8

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