High quality best price Isatin ( 2,3-indolinedione ) CAS NO 91-56-5



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High quality best price Isatin ( 2,3-indolinedione ) CAS NO 91-56-5
High quality best price Isatin ( 2,3-indolinedione ) CAS NO 91-56-5
High quality best price Isatin ( 2,3-indolinedione ) CAS NO 91-56-5
High quality best price Isatin ( 2,3-indolinedione ) CAS NO 91-56-5
High quality best price Isatin ( 2,3-indolinedione ) CAS NO 91-56-5
High quality best price Isatin ( 2,3-indolinedione ) CAS NO 91-56-5
High quality best price Isatin ( 2,3-indolinedione ) CAS NO 91-56-5

High quality best price Isatin ( 2,3-indolinedione ) CAS NO 91-56-5

  • Item No.TOP
    MOQ25 Gram
  • Product size10 x 10 x 7 cm
    Product weight1.1 kg
Tag  wholesale
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From $0.700.430.26 / Gram
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If over 500pcs, mass production will start until pre-production sample has been approved.

Est. 7 days production

Product Description


Other name:Indole-2,3-dione

Synonyms:2,3-Indolinedione; 1H-Indole-2,3-dione



Color:Orange-red single prism crystal


Molecular formula:C8H5NO2

Molecular weight:147.13

Melting point:193-195 °C (dec.)(lit.)


AppearanceOrange red crystalline
Content≥98.0% (HPLC)


1. The product is used as an intermediate in dyestuff and medicine. It is used to produce drug Xin Kefen and disperse yellow E-3G. In chemical analysis, it is a reagent for the determination of copper ion, thiol, thiophene and urinary blue mother.
2. for reducing dyes and drugs and so on
3. as a reagent for the determination of ketone and thiophene
4. indigo and Mayan blue are used as reference material to prepare indigo and Mayan blue; it is used to prepare two azoacetone derivatives, spironolyl indole derivatives and P- glycoproteins for multidrug resistant cells. Thiazole -4- ketone is fused into indole 2- ketone through a spiral ring. As a protein tyrosine phosphatase B of Mycobacterium tuberculosis, it is a powerful choice. Selective inhibitors, three azoles Isatine complexes as strong antibacterial agents and antifungal agents, biological activity related structures such as the stud (indolothiazole -4- ketone); used in series with heterocyclic acetal amines and Knoevenagel enrichment; indigo using direct sp2/sp3C-H bond activation reaction, Pd (II) The C-H addition reaction forms 3- to replace -3- hydroxyl 2- hydroxyindole.
5. to test the precipitant of ketone and silver. Spectrophotometric Determination of thiophene, thiol, thiophene, urine rum and proline reagent.

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Company Information

Qingdao Sigma Chemical Co., Ltd.is a global chemical industry manufacturers and suppliers of pharmaceuticals and intermediates, food and feed additives, herbal extracts, agrochemicals and fine chemicals etc.

The aim of Qingdao Sigma Chemical Co., Ltd is a quality policy that "Elements in the system all have been satisfied, Personnel has been trained; Every batch of material is checked, Each procedure guarantees the quality; Every bag of our products is top grade, Service is thoughtful all the time, quality and reputation to increase market share and promote enterprise development. The quality, colors and forms of our products have reached a high level in related chemical industry, which relies on characteristic and advanced processing technology and it has gained a high and reliable reputation from customers at both quality and services.
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Q1: Are you a manufacturer?
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Q4:Can you give me a discount price?
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Q5:How can i get a sample?
free samples is available,but freight charges will be at your account and the charges will be return to you or deduct from your order in the future.

Q6: How to confirm the Product Quality before placing orders?
A:You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.

Q7:How do you treat quality complaint?
A:First of all, our quality control will reduce the quality problem to near zero. If there is a real quality problem caused by us, we will send you free goods for replacement or refund your loss.

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