HPI-4
HPI-4 (CAS: 302803-72-1), with the molecular formula C17H9Cl2N3O2 and a molecular weight of 358.18 g/mol, is a bioactive small molecule. This white to beige powder is primarily recognised for its role in cell signaling and neuroscience research, particularly within the context of angiogenic factors and the Hedgehog pathway. It is supplied by Tech Serve Solutions for laboratory and research applications.
- IUPAC
- 2,4-Dichloro-a-(3,4-dihydro-4-oxo-2(1H)-quinazolinylidene)-β-oxo-benzenepropanenitrile,Ciliobrevin A,Hedgehog Pathway Inhibitor 4
- Synonyms
- Ciliobrevin A2,4-Dichloro-a-(3,4-dihydro-4-oxo-2(1H)-quinazolinylidene)-β-oxo-benzenepropanenitrileHedgehog Pathway Inhibitor 4

Cell Signaling Research
HPI-4 serves as a valuable tool in studying cellular communication pathways. Its involvement with angiogenic factors makes it pertinent for research into cellular growth and development processes.
Neuroscience Investigations
As a molecule associated with cell signaling, HPI-4 may be utilised in neuroscience research, potentially aiding in the understanding of neural cell development and function.
Hedgehog Pathway Studies
This compound is identified as a Hedgehog Pathway Inhibitor, making it a key reagent for researchers investigating this crucial developmental signaling pathway.
| Molecular weight | 358.18 |
|---|---|
| Empirical formula | C17H9Cl2N3O2 |
| Assay | ≥98% (HPLC) |
| Form | powder |
| Colour | white to beige |
| Solubility | DMSO: soluble10 mg/mL, clear |
| Storage temperature | 2-8°C |


Hazard statements
- H302Harmful if swallowed
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P273Avoid release to the environment
- P501Dispose of contents and container per local regulations
| Transport (UN / ADR) | UN 3077 9 / PGIII |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn,N |
| Risk statements (R) | 22-50/53 |
| Safety statements (S) | 60-61 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is HPI-4 used for?
+
HPI-4 is used in laboratory research, particularly for studying cell signaling, neuroscience, angiogenic factors, and the Hedgehog pathway.
What are the CAS number and formula for HPI-4?
+
The CAS number for HPI-4 is 302803-72-1 and its molecular formula is C17H9Cl2N3O2.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies HPI-4 with a purity of ≥98% (HPLC). This is a research-grade chemical and is not supplied as USP, BP, EP, or for human consumption.
What are the safety and handling precautions for HPI-4?
+
HPI-4 is classified with GHS07 and GHS09 symbols and carries a 'Warning' signal word. It has hazard statements H302 (Harmful if swallowed) and H410 (Very toxic to aquatic life with long lasting effects). Handle with appropriate personal protective equipment, avoid release into the environment, and consult the Safety Data Sheet (SDS) before use.
How is HPI-4 packaged and shipped?
+
HPI-4 is typically supplied as a white to beige powder. It is stored at 2-8°C. As a supplier and exporter, Tech Serve Solutions adheres to all relevant shipping regulations for chemicals, including UN 3077.
How can I request a quote or sample for HPI-4?
+
To request a quote or sample for HPI-4, please contact our sales team through the website or by phone, referencing the product name and CAS number 302803-72-1.
▶ Related products

(−)-Curcumol
C15H24O2
Cell Biology
(±) Clopidogrel hydrogensulfate
Cell Biology

(±)-L-Alliin
C6H11NO3S
Cell Biology
(±)-2-Amino-4-phosphonobutyric acid
C4H10NO5P
Cell Biology
(±)-2-Methylarachidonoyl-2′-fluoroethylamide
C23H38NOF
Cell Biology
(±)-3,4-Methylenedioxy-N-ethylamphetamine hydrochloride
Cell Biology

(±)-3,4-Methylenedioxyamphetamine hydrochloride
Cell Biology

(±)-3,4-Methylenedioxymethamphetamine hydrochloride
Cell Biology
▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis