Calcium DTPA

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MedKoo CAT#: 412112

CAS#: 2531-75-1 (calcium)

Description: Calcium DTPA is an edetate and a chelating agent used in preparing radiopharmaceuticals.

Chemical Structure

Calcium DTPA
CAS# 2531-75-1 (calcium)

Theoretical Analysis

MedKoo Cat#: 412112
Name: Calcium DTPA
CAS#: 2531-75-1 (calcium)
Chemical Formula: C28H44CaN6O20
Exact Mass: 824.2236
Molecular Weight: 824.76
Elemental Analysis: C, 40.78; H, 5.38; Ca, 4.86; N, 10.19; O, 38.80

Price and Availability

This product is not in stock, which may be available by custom synthesis. For cost-effective reason, minimum order is 1g (price is usually high, lead time is 2~3 months, depending on the technical challenge). Quote less than 1g will not be provided. To request quote, please email to sales or click below button.
Note: Price will be listed if it is available in the future.

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Related CAS #: 2531-75-1 (calcium)   67-43-6 (free acid)  

Synonym: Calcium DTPA; Ca-DTPA; CaDTPA; Ca DTPA

IUPAC/Chemical Name: Glycine, N,N-bis(2-(bis(carboxymethyl)amino)ethyl)-, calcium salt


InChi Code: InChI=1S/2C14H23N3O10.Ca/c2*18-10(19)5-15(1-3-16(6-11(20)21)7-12(22)23)2-4-17(8-13(24)25)9-14(26)27;/h2*1-9H2,(H,18,19)(H,20,21)(H,22,23)(H,24,25)(H,26,27);/q;;+2/p-2


Appearance: Solid powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO

Shelf Life: >3 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

Preparing Stock Solutions

The following data is based on the product molecular weight 824.76 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL

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*When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and SDS / CoA (available online).

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Additional Information

Pentetic acid (DTPA) has strong affinity for iron but also shows affinities for other heavy metals, thereby is used in the treatment of iron-storage disease and poisoning from heavy and radioactive metals. DTPA may chelate metallic moieties of unbound, extracellular radioimmunotherapeutics, thereby aggregating radioimmunotherapeutics locally to higher concentrations, and improving tumor cell radiocytotoxicity, while sparing normal tissues from the radiocytotoxic effects. In addition, DTPA is used in radioimaing procedures when complexes with radioisotopes, ex., Tc 99m or In 111.