Isatin (93% Crude) - High-Quality Chemical Intermediate from China Suppliers | Shengyu Factory
Product Attributes
1. Chemical Name
1H-Indole-2,3-dione / 2,3-Indolinedione
1H-Indole-2,3-dione / 2,3-Indolinedione
2. Application Grade
Dye Intermediate (Industrial Crude Grade)
Dye Intermediate (Industrial Crude Grade)
3. Molecular Formula
C8H5NO2
C8H5NO2
4. Physical Form
Crystalline Powder / Solid
Crystalline Powder / Solid
5. Packaging
25 kg / Iron Drum or customized woven bag
25 kg / Iron Drum or customized woven bag
Performance Data:
| Product Name | Assay (Purity) | Melting Point | Moisture | Ash Content | Solubility | pH (Aqueous) |
| Isatin 93% Crude | ≥ 93.0% | > 190.0 °C | ≤ 2.0% | ≤ 1.5% | Soluble in hot water & ethanol | 6.5 - 7.5 |
Product Description
SHENGYU® Isatin (CAS 91-56-5) is a vital organic intermediate, presenting as an orange-red to brown crystalline powder. Specifically offered at a 93% crude purity, this product provides a highly economical and practical solution for industrial dye manufacturers who perform their own downstream refining or direct synthesis. Isatin is a foundational building block in the chemical industry, widely recognized for its reactive diketopiperazine structure, featuring a fused benzene and pyrrole ring system.
In the realm of dye synthesis and finishing, it is an indispensable precursor for producing high-performance colorants. It is explicitly utilized in the manufacturing of Disperse Yellow E-3G, as well as serving as a foundational material in the preparation of indigo derivatives and vibrant pigments like Maya Blue and Maya Yellow. Its unique reactivity facilitates essential chemical processes, including one-pot reductions and Knoevenagel condensations during complex dye formulation. As a core intermediate offering from Shengyu Chemical, we ensure a stable, high-volume supply of this versatile compound, tailored to meet the rigorous demands of modern chemical and textile processing facilities.
In the realm of dye synthesis and finishing, it is an indispensable precursor for producing high-performance colorants. It is explicitly utilized in the manufacturing of Disperse Yellow E-3G, as well as serving as a foundational material in the preparation of indigo derivatives and vibrant pigments like Maya Blue and Maya Yellow. Its unique reactivity facilitates essential chemical processes, including one-pot reductions and Knoevenagel condensations during complex dye formulation. As a core intermediate offering from Shengyu Chemical, we ensure a stable, high-volume supply of this versatile compound, tailored to meet the rigorous demands of modern chemical and textile processing facilities.
Key Features and Performance
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Crucial Dye Synthesis Precursor Essential for the commercial production of Disperse Yellow E-3G and serves as a core structure for various vat dyes and specialized textile pigments.
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Cost-Effective Crude Grade The 93% purity level strikes the perfect balance between raw material affordability and chemical yield, designed specifically for bulk industrial buyers with in-house refining processes.
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Versatile Reactivity in Finishing Highly reactive indole-2,3-dione structure allows for efficient modifications, condensation reactions, and the creation of bis-Schiff bases essential for advanced dye formulations.
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Analytical & Multi-Industry Utility Beyond dye manufacturing, it functions as a highly precise analytical reagent for the determination of copper ions, mercaptans, and thiophene.
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Consistent Quality & Supply Professionally managed by Shengyu Chemical to guarantee reliable lot-to-lot consistency, preventing production downtimes in large-scale dye synthesis operations.
Technical Support
We have professional technical team which support target samples testing from customers around the World. Counter samples will be provided after evaluation. Meanwhile customization service is available in our factory. What's more, we can also provide pre shipment samples for new customers during our 1st cooperation.
Package and Shipment
Package
Packing: 25kg, 50kg, 125kg plastic barrels with pallets
Shipment
Whether you have your own freight forwarder or you would like us to organize shipment; whether you require delivery FOB to a port in China or CIF to a port near you, we are happy to quote and supply whichever way you choose. Please feel free to discuss all options with us.
Our delivery time: Within 20 days after receipt of T/T or L/C bank copy.
Our delivery time: Within 20 days after receipt of T/T or L/C bank copy.
Frequently Asked Questions (FAQ)
Q
What is the purity level of SHENGYU® Isatin (CAS 91-56-5), and is it suitable for direct use in industrial dye production?
SHENGYU® Isatin is offered at a 93% crude purity grade, specifically designed for industrial dye manufacturers. This purity level is ideal for buyers who conduct their own downstream refining or use it directly in large-scale synthesis processes such as the production of Disperse Yellow E-3G and indigo derivatives.
Q
What are the main applications of Isatin in the dye and chemical industry?
Isatin is primarily used as a key intermediate in the synthesis of Disperse Yellow E-3G, indigo derivatives, and specialty pigments such as Maya Blue and Maya Yellow. It also serves as a precise analytical reagent for detecting copper ions, mercaptans, and thiophene, making it valuable across multiple industrial sectors.
Q
What packaging options are available for Isatin, and what is the standard shipment lead time?
Isatin is available in 25 kg iron drums or customized woven bags, as well as 25 kg, 50 kg, and 125 kg plastic barrels with pallets. Standard delivery time is within 20 days after confirmation of T/T payment or receipt of the L/C bank copy.
Q
Does Shengyu Chemical offer technical support or customized production services for Isatin?
Yes. Shengyu Chemical has a dedicated professional technical team that supports target sample testing for customers worldwide. Counter samples are available after evaluation, and customization services are offered directly from the factory. Pre-shipment samples can also be provided for new customers during their first cooperation.
Q
What shipping terms does Shengyu Chemical support for international orders?
Shengyu Chemical supports flexible shipping arrangements. Whether you have your own freight forwarder or need us to organize logistics, we can accommodate FOB (port in China) or CIF (port near your destination) terms. We are happy to discuss and quote all available options based on your specific requirements.
Q
How does Shengyu Chemical ensure consistent quality and supply reliability for Isatin?
Shengyu Chemical maintains strict quality management procedures to ensure reliable lot-to-lot consistency for every batch of Isatin produced. Each batch meets the specified performance data, including ≥93.0% assay, melting point >190°C, moisture ≤2.0%, and ash content ≤1.5%, ensuring uninterrupted production for large-scale dye synthesis operations.