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from Taxus yannanensis, powder

Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
MDL number:
PubChem Substance ID:

Quality Level

biological source

Taxus yannanensis






213 °C (dec.) (lit.)


DMSO: 50 mg/mL (can be stored frozen for several months)
acetonitrile: soluble
ethanol: soluble
methanol: soluble (undergoes transesterification)

Mode of action

DNA synthesis | interferes

antibiotic activity spectrum



Bristol-Myers Squibb

storage temp.


SMILES string




InChI key


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General description

Chemical structure: taxoide


Paclitaxel has been used to study PREP2-tubulin interactions using coimmunoprecipitation assays on NIH3T3 cell extracts. This drug has also been used to stabilize tubulin obtained from pig brain.


1, 5, 25 mg in glass bottle

Biochem/physiol Actions

Paclitaxel is a potent anti-neoplastic and anti-mitotic taxane drug, which binds to the N-terminus of β-tubulin and and stabilizes microtubules arresting the cell cycle at the G2/M phase. The microtubule damage induces apoptosis through a JNK-dependent pathway followed by a JNK-independent pathway, perhaps related to the activation of protein kinase A (PKA) or of Raf-1 kinase, resulting in phosphorylation of Bcl-2. A major metabolite via CYP2CB is 6α-hydroxypaclitaxel (6α-OHP).

Features and Benefits

This compound was developed by Bristol-Myers Squibb. To browse the list of other pharma-developed compounds and Approved Drugs/Drug Candidates, click here.
This compound is a featured product for ADME Tox research. Click here to discover more featured ADME Tox products. Learn more about bioactive small molecules for other areas of research at


Paclitaxel undergoes transesterification in methanol and hydrolyzes in aqueous solutions.

Preparation Note

Paclitaxel is soluble in DMSO at 50 mg/ml and can be stored frozen for several months. It is also soluble in methanol (undergoes transesterification), acetonitrile and ethanol. Paclitaxel is rapidly destroyed in weakly alkaline, methanolic solutions and in strongly acidic methanolic solutions (1:1 of methanol:concentrated HCl). It is also soluble in a mixture of 50% Cremophor EL and 50% anhydrous ethanol.

Signal Word


Hazard Classifications

Eye Dam. 1 - Muta. 1A - Repr. 1A - Resp. Sens. 1 - Skin Irrit. 2 - Skin Sens. 1 - STOT RE 1 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

6.1C - Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects



Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

Certificate of Origin

Akane Furuta et al.
The Journal of biological chemistry, 284(9), 5927-5935 (2009-01-07)
Outer arm dynein (OAD) of cilia and flagella contains two or three distinct heavy chains, each having a motor function. To elucidate their functional difference, we compared the in vitro motile properties of Chlamydomonas wild-type OAD containing the alpha, beta
Klaus Haller et al.
The Journal of biological chemistry, 279(47), 49384-49394 (2004-09-02)
The PREP, MEIS, and PBX families are mammalian members of the TALE (three amino acid loop extension) class of homeodomain-containing transcription factors. These factors have been implicated in cooperative DNA binding with the HOX class of homeoproteins, but PREP and
Taroh Satoh et al.
Journal of clinical oncology : official journal of the American Society of Clinical Oncology, 32(19), 2039-2049 (2014-05-29)
In Asian countries, paclitaxel once per week is used as second-line treatment in advanced gastric cancer, including human epidermal growth factor receptor 2 (HER2) -positive tumors. The role of anti-HER2 agents, including lapatinib, in this setting and population is unclear.
Zhiping Zhang et al.
Expert opinion on drug delivery, 10(3), 325-340 (2013-01-08)
Paclitaxel (PTX) is one of the most effective broad-spectrum chemotherapeutic agents in the treatment of cancers. However, its clinical application has been limited due to its poor water solubility. Its current clinical administration uses the adjuvant of serious side effects
Martin R Stockler et al.
Journal of clinical oncology : official journal of the American Society of Clinical Oncology, 32(13), 1309-1316 (2014-04-02)
To determine the effects of bevacizumab on patient-reported outcomes (PROs; secondary end point) in the AURELIA trial. Patients with platinum-resistant ovarian cancer were randomly assigned to chemotherapy alone (CT) or with bevacizumab (BEV-CT). PROs were assessed using the European Organisation

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