Isatin-Shandong Huashang Chemical Co., Ltd.

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Isatin

Brand：HS

Model：25kg/drum

Purity：99%

Cas：91-56-5

Createtime： 2026-04-14
Updatetime： 2026-04-15

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Product Details

useage	Industrial use
deliveryInfo
appearance	powder
Molecular Weight	147.13
aliasen
supplyCapacity	50000MT/Month
harbor	Qingdao,China
minorder	1KG
Appearance	Orange-red crystalline powder

Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing, and sales of fine chemicals. Headquartered in Jinan, Shandong, China, we are committed to delivering high-quality products to our global partners. Currently, over 90% of our products are exported to developed markets, including North America, Europe, Japan, South Korea, and the Middle East.

Product Name: Isatin

Alias: Indole-2,3-dione; 2,3-Indolinedione; 1H-Indole-2,3-dione; 2,3-Diketoindoline; Isatic acid lactam; MFCD00005718

CAS No.: 91-56-5

EINECS No.: 202-077-8

Molecular Formula: C?H?NO?

Molecular Weight: 147.13 g/mol

Classification: Organic intermediate, pharmaceutical intermediate, dye intermediate, analytical reagent, fine chemical

Physical & Chemical Properties

Appearance: Orange-red monoclinic prismatic crystals or crystalline powder, with a bitter taste

Density: 1.47 g/cm3 (estimate)

Melting Point: 203–205 °C (lit., partial sublimation)

Boiling Point: 267.3 ± 40.0 °C (predicted)

Vapor Pressure: 0.0 ± 1.8 mmHg at 25 °C

Refractive Index: 1.679

Solubility: Slightly soluble in water (1.9 g/L at 20 °C); soluble in hot ethanol, benzene, acetone, and alkaline solutions (purple color, turns yellow on standing); slightly soluble in ether

Purity: ≥98.0% (HPLC/GC), ≥99.0% available for high-purity grade

Storage Condition: Sealed, dry place; room temperature storage is acceptable; avoid strong light, high temperature, and incompatible substances (strong oxidants, strong bases); keep container tightly closed

Main Uses

Pharmaceutical Field: Key intermediate for synthesizing various biologically active compounds, including anti-inflammatory, antiviral, and anticancer agents; used in the production of cinchophen and other drugs; serves as a scaffold for spirooxindole derivatives with diverse pharmacological activities.
Dye & Pigment Field: Intermediate for manufacturing dyes (e.g., Disperse Yellow E-3G) and pigments; contributes to the yellow color in "Maya Yellow" pigment and acts as a precursor for indigo synthesis.
Analytical Chemistry: Used as a chromatographic spray reagent for amino acids; analytical reagent for determining cuprous ions, thiols, thiophenols, and indigotin; employed in redox and colorimetric assays.
Other Fields: Organic synthesis building block for Knoevenagel condensation, cascade reactions, and Pd(II)-catalyzed C-H activation; used in preparing biologically relevant scaffolds like spiro[indole-thiazolidinones] and as a research tool in biochemistry and materials science.

Specification Table

Item	Specification	Unit	Remarks
Product Name	Isatin	—
CAS Number	91-56-5	—	EINECS: 202-077-8; MFCD00005718
Molecular Formula	C?H?NO?	—	Indole-2,3-dione derivative
Molecular Weight	147.13	g/mol
Appearance	Orange-red crystalline powder	—	Bitter taste; monoclinic prismatic crystal form
Purity	≥98.0 (≥99.0 available)	%	HPLC/GC; high-purity grade for research
Melting Point	203-205	℃	lit.; partial sublimation at melting point
Solubility	Slightly soluble in water, soluble in hot ethanol, acetone	—	1.9 g/L water; purple in alkaline solutions