WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 561209

CAS#: 160359-68-2

Description: Naltalimide, also known as TRK-130, is a unique µ-opioid receptor partial agonist. Naltalimide also enhances the bladder storage function by modulating the afferent limb of the micturition reflex through µ-opioid receptors in the spinal cord. Naltalimide could be a more effective and safer therapeutic agent with a different fashion from antimuscarinics and conventional opioids for overactive bladder.

Chemical Structure

CAS# 160359-68-2

Theoretical Analysis

MedKoo Cat#: 561209
Name: Naltalimide
CAS#: 160359-68-2
Chemical Formula: C28H28N2O5
Exact Mass: 472.20
Molecular Weight: 472.540
Elemental Analysis: C, 71.17; H, 5.97; N, 5.93; O, 16.93

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.

Request quote for custom synthesis

Synonym: Naltalimide; TRK-130; TRK130; TRK 130

IUPAC/Chemical Name: N-[(5R, 6R, 14S)-17-(cyclopropylmethyl)-4, 5-epoxy-3,14-dihydroxymorphinan-6-yl] phthalimide


InChi Code: InChI=1S/C28H28N2O5/c31-20-8-7-16-13-21-28(34)10-9-19(30-25(32)17-3-1-2-4-18(17)26(30)33)24-27(28,22(16)23(20)35-24)11-12-29(21)14-15-5-6-15/h1-4,7-8,15,19,21,24,31,34H,5-6,9-14H2/t19-,21-,24+,27+,28-/m1/s1

SMILES Code: O=C(N1[C@H]2[C@@]3([H])[C@]45C6=C(O3)C(O)=CC=C6C[C@@H](N(CC7CC7)CC5)[C@]4(O)CC2)C8=CC=CC=C8C1=O

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: >2 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

More Info:

Biological target:
In vitro activity:
In vivo activity:

Preparing Stock Solutions

The following data is based on the product molecular weight 472.54 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
Formulation protocol:
In vitro protocol:
In vivo protocol:

Molarity Calculator

Calculate the mass, volume, or concentration required for a solution.

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

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Dilution Calculator

Calculate the dilution required to prepare a stock solution.

1: Fujimura M, Izumimoto N, Momen S, Yoshikawa S, Kobayashi R, Kanie S, Hirakata M, Komagata T, Okanishi S, Hashimoto T, Yoshimura N, Kawai K. Characteristics of TRK-130 (Naltalimide), a novel opioid ligand, as a new therapeutic agent for overactive bladder. J Pharmacol Exp Ther. 2014 Sep;350(3):543-51. doi: 10.1124/jpet.114.214031. Epub 2014 Jun 13. PubMed PMID: 24928951.

2: Atala A. Re: Characteristics of TRK-130 (naltalimide), a novel opioid ligand, as a new therapeutic agent for overactive bladder. J Urol. 2015 Mar;193(3):1060. doi: 10.1016/j.juro.2014.12.029. Epub 2014 Dec 18. PubMed PMID: 25765428.

3: Wein AJ. Re: Characteristics of TRK-130 (Naltalimide), a Novel Opioid Ligand, as a New Therapeutic Agent for Overactive Bladder. J Urol. 2016 Jan;195(1):223. doi: 10.1016/j.juro.2015.10.078. Epub 2015 Nov 21. PubMed PMID: 26699998.

4: Fujimura M, Izumimoto N, Kanie S, Kobayashi R, Yoshikawa S, Momen S, Hirakata M, Komagata T, Okanishi S, Iwata M, Hashimoto T, Doi T, Yoshimura N, Kawai K. Mechanisms of inhibitory action of TRK-130 (Naltalimide), a μ-opioid receptor partial agonist, on the micturition reflex. Int Urol Nephrol. 2017 Apr;49(4):587-595. doi: 10.1007/s11255-017-1509-y. Epub 2017 Jan 16. PubMed PMID: 28093646.