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

MedKoo CAT#: 584909

CAS#: 67656-42-2

Description: Onchidal is a major lipid-soluble component of the defensive secretion of the mollusk Onchidella binneyi and is responsible for the chemical protection of Onchidella.

Chemical Structure

CAS# 67656-42-2

Theoretical Analysis

MedKoo Cat#: 584909
Name: Onchidal
CAS#: 67656-42-2
Chemical Formula: C17H24O3
Exact Mass: 276.17
Molecular Weight: 276.376
Elemental Analysis: C, 73.88; H, 8.75; O, 17.37

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 @medkoo.com or click below button.
Note: Price will be listed if it is available in the future.

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Synonym: Onchidal

IUPAC/Chemical Name: 2-Butenal, 2-(2-(acetyloxy)ethenyl)-4-(2,2-dimethyl-6-methylenecyclohexyl)-, (E,E)-(+)-


InChi Code: InChI=1S/C17H24O3/c1-13-6-5-10-17(3,4)16(13)8-7-15(12-18)9-11-20-14(2)19/h7,9,11-12,16H,1,5-6,8,10H2,2-4H3/b11-9+,15-7+


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

More Info:

Biological target:
In vitro activity:
In vivo activity:

Preparing Stock Solutions

The following data is based on the product molecular weight 276.38 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:

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1: Abramson SN, Radic Z, Manker D, Faulkner DJ, Taylor P. Onchidal: a naturally occurring irreversible inhibitor of acetylcholinesterase with a novel mechanism of action. Mol Pharmacol. 1989 Sep;36(3):349-54. PubMed PMID: 2779521.

2: Cadelis MM, Copp BR. Investigation of the electrophilic reactivity of the biologically active marine sesquiterpenoid onchidal and model compounds. Beilstein J Org Chem. 2018 Aug 24;14:2229-2235. doi: 10.3762/bjoc.14.197. eCollection 2018. PubMed PMID: 30202476; PubMed Central PMCID: PMC6122400.

3: Pita R, Anadón A, Martínez-Larrañaga MR. [Neurotoxins with anticholinesterase activity and their possible use as warfare agents]. Med Clin (Barc). 2003 Oct 18;121(13):511-7. Review. Spanish. PubMed PMID: 14588195.