3-Cyanophthalide
3-Cyanophthalide (CAS: 27613-27-0, C9H5NO2, MW: 159.14) is a heterocyclic organic compound. It serves as a valuable building block in chemical synthesis. Primarily utilised in research and development, it plays a role in the creation of more complex molecular structures. Its specific applications are within the realm of organic chemistry for the development of novel compounds.
- IUPAC
- 1,3-Dihydro-3-oxo-1-isobenzofurancarbonitrile,3-Cyano-3H-isobenzofuranone
- Synonyms
- 1,3-Dihydro-3-oxo-1-isobenzofurancarbonitrile3-Cyano-3H-isobenzofuranone

Organic Synthesis Intermediate
3-Cyanophthalide is employed as a key intermediate in the synthesis of various organic molecules. Its structure allows for diverse chemical transformations, making it useful in the development of new compounds.
Heterocyclic Compound Research
As a benzofuran derivative, it is utilised in research focused on heterocyclic chemistry. This aids in understanding and developing new materials or pharmaceuticals with heterocyclic motifs.
Building Block for Complex Molecules
The compound functions as a versatile building block, enabling chemists to construct larger and more intricate molecular architectures. This is crucial for drug discovery and materials science.
| Molecular weight | 159.14 |
|---|---|
| Empirical formula | C9H5NO2 |
| Assay | ≥97.5% (GC)98% |

Hazard statements
- H302Harmful if swallowed
- H317May cause an allergic skin reaction
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-43 |
| Safety statements (S) | 36/37 |
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 3-Cyanophthalide used for?
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3-Cyanophthalide is used as a building block and intermediate in organic synthesis, particularly in research and the development of complex heterocyclic compounds.
What is the CAS number and formula for 3-Cyanophthalide?
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The CAS number is 27613-27-0, and the empirical formula is C9H5NO2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3-Cyanophthalide with a minimum purity of ≥97.5% (GC), assaying at 98%. This is suitable for research and general chemical synthesis purposes; TSS does not represent it as USP, BP, or EP grade.
How should 3-Cyanophthalide be handled safely?
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Handle with appropriate personal protective equipment, including a dust mask (N95 type recommended), eyeshields, faceshields, and gloves. Avoid dust formation and ensure adequate ventilation. It is classified as harmful if swallowed (H302) and may cause an allergic skin reaction (H317).
How is 3-Cyanophthalide packed and exported?
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3-Cyanophthalide is carefully packed to ensure safe transit and is available for global export by TSS, adhering to all necessary shipping regulations.
How can I request a sample or quote for 3-Cyanophthalide?
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To request a sample or a quotation for 3-Cyanophthalide, please contact our sales team through the website or by phone.
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