Introduction for 1H-Indole-2,3-dione
1H-Indole-2,3-dione (CAS 91-56-5) is a crucial intermediate in organic synthesis, extensively utilized in pharmaceuticals, dyes, and materials science and usually used in chemical synthesis, pharmaceutical applications, and as an intermediate for other indole derivatives.
Isatin and its derivatives serve as precursors for numerous biologically active molecules, including anti-cancer agents, anti-inflammatory drugs, and antimicrobial compounds.
LBAO Chemicals supplies high-purity Isatin (>98%) and offers customizable moisture levels to meet specific industrial and research requirements.

General Information
| Property | Specification |
|---|
| Product Name | 1H-Indole-2,3-dione (Isatin) |
| CAS RN | 91-56-5 |
| Molecular Formula | C₈H₅NO₂ |
| Molecular Weight | 147.13 g/mol |
| Chemical Name | Isatin |
| Physical State | Solid |
| Purity / Analysis Method | >98.0% |
| Appearance | Orange crystalline solid |
| Flash Point | 186°C (367°F) |
| Melting Point | 150–152°C |
| Boiling Point | 314°C (597°F) at 760 mmHg |
| Density / Relative Density | 1.5 g/cm³ at 25°C |
| Solubility | Slightly soluble in water; soluble in ethanol, ether, and chloroform |
| Vapor Pressure | 2.1 × 10⁻⁶ mmHg at 25°C |
| LogP | 1.78 |
How LBAO Ships and Stores 1H-Indole-2,3-dione
At LBAO Chemicals, we provide reliable global shipping and custom packaging solutions designed to meet the unique demands of the chemical industry.
Whether dealing with hazardous materials or sensitive reagents, our packaging protocols ensure both safety and compliance with international transport standards.
For more details on our shipping and packaging practices, please visit our Shipping & Packaging page.
Packaging: 25 kg per package, available in fiber drums or kraft paper bags based on customer requirements.
Packaging
1. Solids: Standard 25 kg net weight per container, available in fiber drums or multi-layer kraft paper bags, selected according to product properties and customer requirements.
2. Liquids: Packed in chemically compatible glass or high-density polyethylene (HDPE) bottles, in compliance with relevant shipping regulations.
Freight Options
1. Air Freight – For shipments exceeding 50 kg, providing fast and reliable airport-to-airport service within 3–14 days.
2. Sea Freight – For shipments exceeding 100 kg, offering cost-effective seaport-to-seaport delivery within 2–45 days.

Contact Information
For further inquiries, please feel free to contact us:
1.Email: sales@lbaochemicals.com
2. WeChat: mm-18055159278
3. WhatsApp / Telegram / LINE: +1 778 683 1894