Sodium 4-Phenylbutyrate - CAS 1716-12-7 - Calbiochem

A novel anti-neoplastic agent and transcriptional regulator.

Sodium 4-Phenylbutyrate - CAS 1716-12-7 - Calbiochem, SPB, PBNa, 4PBA, 4-Phenylbutyrate, Na, BCKD Kinase Inhibitor I, Branched-Chain α-Ketoacid Dehydrogenase Kinase Inhibitor I, BDK Inhibitor I
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
MDL number:
Pricing and availability is not currently available.

storage conditions


Quality Level


≥98% (by Assay)



mfr. no.


storage condition

OK to freeze
desiccated (hygroscopic)


white to slightly yellow


water: 10 mg/mL

shipped in




InChI key


General description

An antineoplastic agent that demonstrates potent differentiating capacity in multiple hematopoietic and solid tumor cell lines. Acts as an inducer of tumor cytostasis and differentiation as well as of peroxisomal proliferation. A more effective inhibitor of histone deacetylase and inducer of histone acetylation than its structural analogs including 2- and 3-phenylbutyrate. Acts as a transcriptional regulator and improve the targeting of δF508-CFTR (cystic fibrosis transmembrane regulator) for ubiquitination and degradation by reducing the expression of HSC70 in epithelial cells. Also, reported to increase fetal hemoglobin production in vitro and in vivo.
A novel anti-neoplastic agent and transcriptional regulator. Also acts as an inducer of tumor cytostasis and differentiation. Increases fetal hemoglobin production in vitro and in vivo.


100 mg in Plastic ampoule

Biochem/physiol Actions

Product does not compete with ATP.
Reversible: no
Cell permeable: no
Primary Target
Anti-neoplastic agent


Toxicity: Standard Handling (A)


Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 3 months at -20°C.

Other Notes

Tso, S.C., et al. 2013. Proc. Natl. Acad. Sci. USA110, 9728.
Ozcan, U., et al. 2006. Science313, 1137.
Carducci, M.A., et al. 2001. Clin. Cancer Res.7, 3047.
Rubenstein, R.C. and Zeitlin, P.L. 2000. Am.J. Physiol. Cell. Physiol.278, C259.
Lea, M.A., et al. 1999. Anticancer Res.19, 1971.
Miller, A.C., et al. 1997. Int. J. Radiat. Biol. 72, 211.
Rubenstein, R.C., et al. 1997. J. Clin. Invest. 100, 2457.
Pineau, T., et al. 1996. Biochem. Pharmacol. 52, 659.
Collins, A.F., et al. 1995. Blood 85, 43.
Lea, M.A., et al. 1995. Anticancer Res.15, 879.
Figg, W.D., et al. 1994. Anticancer Drugs 5, 336.
Liu, L., et al. 1994. J. Invest. Dermatol. 103, 335.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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