Retinoic acid p-hydroxyanilide


4-HPR, Fenretinide, N-(4-Hydroxyphenyl)retinamide
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
MDL number:
PubChem Substance ID:

Quality Level

biological source

synthetic (organic)






yellow to yellow-orange

storage temp.


SMILES string




InChI key


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General description

Retinoic acid p-hydroxyanilide is a synthetic analog of retinoid.


Retinoic acid p-hydroxyanilide has been used:
  • as a synthetic retinoid to induce apoptosis in SEB-1 sebocytes
  • as a medium supplement for C2C12 myoblasts to test its effect on ceramide formation
  • to test in cytotoxicity in T-cell acute lymphoblastic leukemia (T-ALL)


5 mg in glass bottle

Biochem/physiol Actions

Retinoic acid p-hydroxyanilide, also called fenretinide, increases reactive oxygen species, activates caspases and induces apoptosis. It also inhibits dihydroceramide desaturase, leading to a decrease in ceramide biosynthesis. Fenretinide may elicit anticancer activity in cultured human breast cancer cells. It acts as an insulin antagonist and may be useful in treating insulin resistance. Fenretinide or 4-HPR has chemotherapeutic potential and is cytotoxic to retinoic acid-resistant cancers.

Features and Benefits

This compound is also offered as part of Sigma′s Library of Pharmacologically Active Compounds (LOPAC®1280), a biologically annotated collection of high-quality, ready-to-screen compounds. Click here to learn more.

Other Notes

Tandem Mass Spectrometry data independently generated by Scripps Center for Metabolomics is available to view or download in PDF. H7779.pdf Tested metabolites are featured on Scripps Center for Metabolomics METLIN Metabolite Database. To learn more, visit sigma.com/metlin.

Legal Information

LOPAC is a registered trademark of Sigma-Aldrich Co. LLC


Exclamation markHealth hazard

Signal Word


Target Organs

Respiratory system

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

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  4. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  5. In what solvents can product H7779, Retinoic acid p-hydroxyanilide, be dissolved?

    Product H7779, Retinoic acid p-hydroxyanilide, can be dissolved in DMSO (25 mg/ml) and ethanol (25 mg/ml).

  6. How can one store a solution of product H7779, Retinoic acid p-hydroxyanilide?

    A solution of product H7779, Retinoic acid p-hydroxyanilide, can be aliquoted and stored at -20°C for up to 3 months. Solutions should be protect from light.

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All-trans retinoic acid (RA, ATRA) is a pleiotropic activation factor that regulates genes associated with normal vertebrate cellular processes such as cell differentiation, cell proliferation, apoptosis, and embryonic development.
Read More
All-trans retinoic acid (RA, ATRA) is a pleiotropic activation factor that regulates genes associated with normal vertebrate cellular processes such as cell differentiation, cell proliferation, apoptosis, and embryonic development.
Read More

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