Phenylhydrazine CAS# 100-63-0

Phenylhydrazine, Promotion Season Now in Store and Free Sample for Testing with Factory Price
  • Appearance: Light yellow to brown red transparent liquid
  • Assay: 85%min
  • Packaging: 200kg/Fiber Barrel.
  • Sample: Available

Quality Control of Phenylhydrazine

Chemical Structure
Packing of Bretazenil

Description of Phenylhydrazine

Phenylhydrazine is the chemical compound with the formula C6H5NHNH2. It is often abbreviated as PhNHNH2.

Basic Info of Phenylhydrazine

Basic Info

Chemical Name



Fenilidrazina [Italian];Phenylhydrazine;Hydrazinobenzene;Hydrazine-benzene;Fenylhydrazine [Dutch];Expand



Molecular Formula


Molecular Weight







Safety Info



Hazard Class


Safety Statements


HS Code


WGK Germany


Packing Group



UN 2572

Risk Statements

R23/24/25; R36/38; R43; R45; R48/23/24/25; R50; R68

Hazard Codes

T; N



Appearance & Physical State

yellow to pale brown oily liquid



Boiling Point


Melting Point


Flash Point


Refractive Index


Water Solubility

145 g/L (20 ºC)


Stable, but may decompose in sunlight. May be air or light sensitive. Incompatible with strong oxidizing agents, metal oxides.

Storage Condition

Store at RT.

Vapor Density

4.3 (vs air)

Vapor Pressure

<0.1 mm Hg ( 20 °C)


Numbering system

MDL number


EINECS number


RTECS number


BRN number



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What is Phenylhydrazine?

Part I: Introduction

     With the progress of science and technology and the development of society, chemical products have invariably permeated our daily lives, in medicine, food, cosmetics, electronics, industry, and other areas, becoming an essential part of our lives. One such product is Phenylhydrazine which has developed particularly rapidly in recent years. Do you know about Phenylhydrazine?


The official answer: Phenylhydrazine is an organic substance with the chemical formula C6H8N2, white monoclinic prismatic crystals or oily liquid with an aromatic odor, fading to yellow in the air. It is toxic. Melting point 19.5℃ (melting point 24℃ for phenylhydrazine hydrate). Boiling point 243.5℃. Relative density 1.0978. refractive index 1.60813. flashpoint 69℃. Weakly basic, Ka(15℃)1.62×10-9. miscible with ethanol, ether, benzene, etc. Slightly soluble in water and petroleum ether. It can be produced by diazotization of aniline and then reduction of NaHSO3. It is an important intermediate in the dye, medicine, and pesticide industry.

What’s the application of Phenylhydrazine?

Phenylhydrazine is the first synthetic hydrazine derivative, commonly used as organic, dyestuff, pharmaceutical, and pesticide intermediates. Organic intermediates, preparation of pyrazoline, triazole, indole, etc.; dye intermediates, preparation of diazo dye intermediates, such as 1-phenyl-3-methyl-5-pyrazolone, etc.; pharmaceutical intermediates, preparation of antipyretic, analgesic, anti-inflammatory drugs, such as antipyrine and aminopyrine, etc.; photographic drugs (photographic pigments), phenylhydrazine is also used in the production of pesticide insecticide “beaten phosphorus “Phenylhydrazine is also an important carbonyl identification reagent, used to identify aldehydes Chemicalbook, ketones, and sugars. Benzhydrazine is toxic and causes anemia and headache due to hemolytic effect after inhalation, and causes yellow bile in severe cases, and also has an irritating effect on eyes and can cause the corneal disorder. The maximum permissible concentration in the workplace is 0.44mg/m3. Laboratory uses aniline as raw material, reacts with sodium nitrite in hydrochloric acid to produce diazonium salt, then reacts with sulfurous acid and sulfur dioxide to reduce and produce sodium phenyl hydrazine sulfonate, then performs hydrochloric acid to produce phenylhydrazine hydrochloride, neutralizes and deacidifies to produce phenylhydrazine. Phenylhydrazine is used in the production of pesticides for the synthesis of organophosphorus insecticide triazophos intermediate 1-phenyl aminourea, pyridazine thiophos intermediate 1-phenyl-3,6-dihydroxypyridazine, but also fungicides new varieties of oxazolone (faChemicalbookmoxadone), imidazoline (fenamidone) intermediates, in addition, phenylhydrazine as organic synthetic raw materials. It is also used as an intermediate in dyestuff, medicine, and other industries, and as an analytical reagent. It is used as an analytical reagent and chromatographic reagent. It is used in the production of dyes, drugs, contrast agents, etc. It is an intermediate of dyestuff, medicine, and pesticide, used in the production of chromogranin AS-G, drug Antipyrine, etc. Dissolve phenylhydrazine in 95% ethanol, then add benzaldehyde and reflux for 1h to get phenylhydrazone. Phenylhydrazone is also an intermediate of organic synthesis. Phenylhydrazine is also used as an analytical reagent. It is used as a weak base to make lead, chromium and other trivalent and tetravalent elements precipitate out as hydroxide. Photometric determination of aluminum, chromium, copper, molybdenum, titanium, and zirconium. Determination of gold, iridium, molybdenum, palladium, platinum, silver. Colorimetric determination of the reducing agent of phosphoric acid. Can form phenylhydrazone with aldehyde, ketone, and sugar with different melting points, according to which these substances can be identified.


Sincere to the customer and in good faith of quality is our forever followed motto. It’s the basement to be a human and do business. We take all responsibility for our products and service sincerely. We are a company integrating R&D, production, and sales. The design, research, and development of pharmaceutical intermediates including more than 330 kinds of pharmaceutical intermediates such as Anti-infectives, Cardiovascular and Cerebrovascular Systems, Digestive System, Santi-tumor, Nervous System, Geriatric Drugs, and Gynecological Drugs. At the same time, we have more than 4,000 factories in strategic cooperation with nearly 50,000 chemical products, so we can provide you with a one-stop purchasing service, which greatly saves customers’ procurement costs and time.

Hello, I’m Pew Ni, the chemical products one-stop solution expert.

Hi, I‘m Peter Ni, the founder of Sincere-Chem, I’ve been running a company in China that exporting chemicals, pharmaceuticals, and intermediates for over 70 countries now. And a range of 50,000 products with the best quality and competitive price to meet your different purchasing needs.

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United Kingdom Giles
United Kingdom Giles
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Peter has been my partner for many years, we met at the Shanghai CPHI Fair in 2014, for the first time I didn't have much interest in Peter's products because our company had a stable supplier. Although we didn't work together, Peter would often send me important news and interesting trend information about the industry, so we became good friends, even though I didn't place any orders with him during this time, even if it was a sample order. In September 2016, our original supplier was unable to provide us with the quality and delivery guarantees we needed, so I first thought of Peter and his company. Until now, we have maintained a very good personal friendship in addition to a steady business relationship.
India Shikhar
India Shikhar
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In all my years of sourcing from China, I first time to found that working with Sincere Chemical was so good, they helped me with all the production and delivery as well as a lot of technical expertise, which saved me a lot of time. When I first approached Peter for a quotation for Optical Brightener, he made me a detailed quotation with not only prices but also foreign trade details, company profile, company strengths, R&D capabilities, production capacity, packaging methods, raw material control, environmental protection, and much more. This information was a very important reference for me in making purchasing decisions. Sincere Chemical is a trustworthy supplier and I believe our business will grow from strength to strength!
Korea Kim
Korea Kim
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Hi, I'm Kim, I'm Peter's partner and although I don't like him very much (because he never gives me more money for my prices, hahaha) I'm still willing to write him customer feedback. As an international buyer, I have to deal with a lot of things every day and my inbox is often full of development letters. It's a lot of junk and meaningless pleasantries, which I don't like that much, but Peter's emails always give me a better understanding of the product and the industry. I am also very pleased with his work ethic, and I am very happy with his work every time I work with him, not only in providing quotations but also in facilitating all the details of my work so that I can concentrate more on other things, so he is the best supplier for me. Although his prices are not the lowest among all suppliers, his products give me the greatest peace of mind.
USA Franklin
USA Franklin
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Sincere Chemical team visited our USA factory in the year of 2017. We think highly of cooperation with them. We thanked you for the past excellent orders and best product quality. We also talked about some new products for future orders. We will be still in strategic cooperation in the future and help each other.
Canada Kate
Canada Kate
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I just got the product. The quality is awesome. I’m very happy. Hope to place soon a new order in your company. Also wish for our future business.
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Sincere Chemical is a reliable and professional company. Not only on exporting but also their professional team service. Their team gave us so many suggestions for our new project. We are really satisfied with their awesome service and best product quality. Sincere-Chem’s vendor code is 51465768 in our cooperated vendor list system.
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I have visited Sincere Chemical company in the year 2018. Their company can be considered as one of the most professional, customer-focused, and product quality-driven companies that I have worked with in recent years.
Brazil Aline
Brazil Aline
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We are a pharmaceutical products manufacturer in Brazil. I’m happy to cooperate with Sincere Chemical especially cooperate with Peter. Peter is patient and friendly. I’m satisfied with his 24*7 hours service. We are not only cooperators but also best friends with each other.
Mexico Gonzalo
Mexico Gonzalo
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Great service and very supportive. This is my first order and I feel fortunate to be with Peter and his company. Product received was the right good quality product, so my review is more related with the quality, service and shipment. Thank you for sending. next time I will order again. Good supplier...