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API Impurities

D-Thyroxine

Reference StandardAvailable on request

Order D-Thyroxine (CAS 51-49-0) online at Zemixal. Request a quote with price, lead time and documents. Catalogue no. ZX-031160.

Pack sizes
D-Thyroxine chemical structure
CAS number51-49-0
FormulaC15H11I4NO4
Molar mass776.87 g/mol
Physical formSolid
HS code38229090
InChIKeyXUIIKFGFIJCVMT-GFCCVEGCSA-N
IUPAC name(2R)-2-amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]propanoic acid

About D-Thyroxine

D-Thyroxine is supplied by Zemixal as a characterised reference material for Levothyroxine analysis. Identity at a glance (Reference Standard): CAS 51-49-0, formula C15H11I4NO4 and molar mass 776.87 g/mol. It is handled as a solid.

Typical applications

  • Analytical method development
  • Method validation (AMV)
  • QC release testing
  • ANDA / DMF filings

Storage and safety notes

Classified under GHS with signal word Warning and hazard statements H302, H312 and H332. 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. Each lot travels with a certificate of analysis with characterisation data. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.

Reference standards for Levothyroxine

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

Levothyroxine 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 D-Thyroxine
Product nameD-Thyroxine
Catalogue numberZX-031160
CAS number51-49-0
IUPAC name(2R)-2-amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]propanoic acid
Molecular formulaC15H11I4NO4
Molar mass776.87 g/mol
Exact mass776.6867
GradeReference Standard
Physical formSolid
XLogP32.4
H-bond donors / acceptors3 / 5
Topological polar surface area92.8 Ų
HS code38229090
InChIKeyXUIIKFGFIJCVMT-GFCCVEGCSA-N
SMILESC1=C(C=C(C(=C1I)OC2=CC(=C(C(=C2)I)O)I)I)C[C@H](C(=O)O)N
PubChem CID8730
SynonymsDextrothyroxine, O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-D-tyrosine, (2R)-2-amino-3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl)propanoic acid, (R)-2-Amino-3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl)propanoic acid, Choloxin, D-T4, D-Tyrosine, O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-, Biotirmone, (2R)-2-amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]propanoic aci d, (R)-2-Amino-3-(4-(4-hydroxy-35-diiodophenoxy)-35-diiodophenyl)propanoic acid, D-4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodobenzylalanine

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
  • H312Harmful in contact with skin
  • H332Harmful if inhaled

Precautionary statements P261, P264, P270, P271, P280, P301 + P317, P302 + P352, P304 + P340, P317, P321, P330, 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 D-Thyroxine
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 D-Thyroxine

Which CAS number identifies D-Thyroxine?
D-Thyroxine is registered under CAS 51-49-0. You may also see it listed as Dextrothyroxine, O-(4-hydroxy-3,5-diiodophenyl)-3,5-diiodo-D-tyrosine, (2R)-2-amino-3-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl)propanoic acid. Our catalogue number for this item is ZX-031160.
What are the formula and molar mass of D-Thyroxine?
For D-Thyroxine, its formula is C15H11I4NO4 and its molar mass is 776.87 g/mol. The systematic (IUPAC) name is (2R)-2-amino-3-[4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl]propanoic acid. InChIKey XUIIKFGFIJCVMT-GFCCVEGCSA-N lets you match it in any structure database.
How is D-Thyroxine used in pharmaceutical QC?
D-Thyroxine 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 D-Thyroxine?
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 D-Thyroxine?
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 D-Thyroxine to my country?
Yes. Because D-Thyroxine 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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