Isatin Purity 98.0% Industrial Grade Dye Intermediates

Isatin CAS 91-56-5 | Dye Intermediates

Isatin (CAS 91-56-5, EINECS 202-077-8, molecular formula C8H5NO2, molecular weight 147.13) is a dye intermediate product. Dye and pharmaceutical intermediate: in dyes for indigo, vat and sulfur dyes; in pharma for active ingredients of antiviral, sedative-hypnotic and antitubercular drugs; also an analytical reagent (nitrite and thiol detection) and organic synthesis building block.

I. Basic Product Information

II. Technical Specifications & Supply Information

III. Applications

Dye and pharmaceutical intermediate: in dyes for indigo, vat and sulfur dyes; in pharma for active ingredients of antiviral, sedative-hypnotic and antitubercular drugs; also an analytical reagent (nitrite and thiol detection) and organic synthesis building block.

IV. Quality & Supply Assurance

1. Stable batch-to-batch quality, with batch-by-batch inspection before shipment; a COA is provided with each delivery for full traceability;

2. Standard grades held in stock for fast delivery; bulk custom packing and long-term agreement supply supported;

3. Samples available on request, with third-party testing (e.g., SGS) to support incoming-material verification;

4. Our product line covers dye, pharmaceutical, agrochemical and organic pigment intermediates — a one-stop source for multi-category raw materials.

V. Frequently Asked Questions (FAQ)

Q: What are the CAS number and molecular formula of Isatin?

A: Isatin has CAS registry number 91-56-5, molecular formula C8H5NO2, molecular weight 147.13 and EINECS number 202-077-8.

Q: What are the main uses and applications of Isatin?

A: Dye and pharmaceutical intermediate: in dyes for indigo, vat and sulfur dyes; in pharma for active ingredients of antiviral, sedative-hypnotic and antitubercular drugs; also an analytical reagent (nitrite and thiol detection) and organic synthesis building block.

Q: What are the standard purity and grade of Isatin?

A: Standard supply purity ≥98.0% / ≥99.0% (HPLC), grade Industrial / Pharmaceutical Grade; custom assay and special specifications available on request — exact figures are per the batch COA.

Q: What are the packing specifications and minimum order quantity (MOQ) of Isatin?

A: Standard packing: 25 kg fiber drum (with inner PE liner); moist/dry form on request; 1 kg and 5 kg aluminium foil bags for small quantities. Samples available on request and custom packing supported; bulk orders can be delivered in batches per agreement.

Q: Can you provide COA, MSDS and other quality documents?

A: Dye and pharmaceutical intermediate: in dyes for indigo, vat and sulfur dyes; in pharma for active ingredients of antiviral, sedative-hypnotic and antitubercular drugs; also an analytical reagent (nitrite and thiol detection) and organic synthesis building block.

Q: How should Isatin be stored and transported?

A: Dye and pharmaceutical intermediate: in dyes for indigo, vat and sulfur dyes; in pharma for active ingredients of antiviral, sedative-hypnotic and antitubercular drugs; also an analytical reagent (nitrite and thiol detection) and organic synthesis building block.

VI. Keywords

Isatin, Isatin, Indole-2,3-dione, 2,3-Indolinedione, 91-56-5, Dye Intermediates