Hello. Have you tried from Sigma-Aldrich?

it is available in Sigma-Aldrich. try this link

http://www.sigmaaldrich.com/catalog/search?interface=All&term=2%2C2-Diphenyl-1-picrylhydrazyl&lang=en®ion=YE&focus=product&N=0+220003048+219853281+219853286&mode=match%20partialmax

I can't use website Sigma & I'm not information in 2,2-Diphenyl-1-picrylhydrazyl - Price and Size ... please help my

Just drop a mail to the Sigma customer support and tell them about your requirements. They will surely send you the quotation. Even I can get the information for you which is as below:

Product Number: D9132-1G

Description: 2,2-Diphenyl-1-picrylhydrazyl

Harmonized Tariff Code: 29280090900

CAS Number: 0001898664

Price 488.58 USD (1g) and 1569.19 USD (5g)

Hope this is what you wanted :)

Thank you Dr. Alok ... I know basic information special in product, But High price 1g -5g ...

You could get this product in much lesser prize....i have attached a document with the product details and prize....

How?

Gaurav Kumar If was that buy me article I'll pay you the amount.That amount should be not less than 20 grams and the rate is $ 100 this is what I have because I am a student

At sigma aldrich

I don't know if You already have DPPH radical or not but if You don't I would like to suggest that You really don't need much. In my lab we use solution 0.0044 g per 100 ml of ethanol for analysis and 3 ml of that solution is required for analysis if one sample. Therefore 20 g is really a lot. If You ask anyone to buy it for You make sure it is transported in cooling conditions - as it is free radical it is not very stable. Once You have it also store it in refrigerator. Also make sure to use solution You prepare in 24 h since after that DPPH loses its stability. And be sure to dissolve it (it is hard to dissolve we usually use ultrasounds to help during that process, You shouldn't use heat) - as it makes very dark solution it is sometimes hard to notice little pieces of undissolved DPPH at the bottom of the flask.

Hi Dr. Pogon. When you said 'using ultrasound', do you mean by using sonicator? Sonication does introduce some heat, after sometime (if more than 20 minutes - can go up to 35 degree). So, how long do you exactly use the ultrasounds, and I need to learn how do you do it, more in detail. TQ so much.

this is an old query but. DPPH is available from Sigma Aldrich. Worldwide offices are listed including Yemen office.http://www.sigmaaldrich.com/customer-service/worldwide-offices/worldwide-offices2.html#yemen

Diphenyl picryl hydrazyl (DPPH) is a radical capture agent(anti-oxidant).Sigma-Aldrich or Merck Chem.& other Biochemical companies can provide the same.