Extrasynthese are experts in extraction, synthesis and purification of natural substances. Their product portfolio consists of hundreds of products, after almost 30 years of research and development creating reference standards for regulatory filing, quality testing, or as substrates for early stage R&D. Download and view the Extrasynthese catalogues below listed in alphabetical order, or search via CAS or product name using the search facility. 

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Extrasynthese are experts in extraction, synthesis and purification of natural substances. Their product portfolio consists of hundreds of products, after almost 30 years of research and development creating reference standards for regulatory filing, quality testing, or as substrates for early stage R&D. Download and view the Extrasynthese catalogues below listed in alphabetical order, or search via CAS or product name using the search facility. 

CONTACT US   

Tel:        +44 (0) 151 649 4000   

Web:     www.greyhoundchrom.com   

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Extrasynthese are experts in extraction, synthesis and purification of natural substances. Their product portfolio consists of hundreds of products, after almost 30 years of research and development creating reference standards for regulatory filing, quality testing, or as substrates for early stage R&D. Download and view the Extrasynthese catalogues below listed in alphabetical order, or search via CAS or product name using the search facility. 

CONTACT US   

Tel:        +44 (0) 151 649 4000   

Web:     www.greyhoundchrom.com   

Email:   marketing@greyhoundchrom.com   

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Extrasynthese are experts in extraction, synthesis and purification of natural substances. Their product portfolio consists of hundreds of products, after almost 30 years of research and development creating reference standards for regulatory filing, quality testing, or as substrates for early stage R&D. Download and view the Extrasynthese catalogues below listed in alphabetical order, or search via CAS or product name using the search facility. 

CONTACT US   

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•    N-14339-100MG     

Climbazole Certified reference Standard CAS 38083-17-9

You May Also Have An Interest In: 

Dinitrophenylhydrazine (DNPH)Certified Reference Standard 

 N-10642-100MG

Dinitrophenylhydrazine or DNPH is a reagent used in organic analysis and detection of ketones and aldehydes. This compound contains a benzene ring, two nitro groups, and a hydrazine functional group that is dissolved in a solution of methanol and some concentrated sulfuric acid. It is a successful test when determining the presence of aldehydes and ketones as well as the existence of a drug or demonstrating its absence. DNPH does not react with amides, esters, carboxylic acids, or alcohols.

What is the CAS Number, Density, Boiling Point, and Molar Mass of DNPH?

Like every chemical and compound, DNPH has unique characteristics and molecular makeup.
CAS Registry Number: 119-26-6

• Density: 1.654g/cm3
• Boiling point: 378.6 °C at 760 mmHG
• Molar Mass: 98.14 g/mol

What tests are associated with dinitrophenylhydrazine?

2,4-dinitrophenyldydrazine is known as Brady’s reagent and is a convenient test that separates a mixture’s components between aldehydes and ketones. This results in a condensation reaction with two molecules joining together with the loss of water. If an aldehyde or ketone is present a yellow, the orange or reddish-orange precipitate of the DNPH appears. A positive test is signaled by a yellow precipitate, for aliphatic carbonyls, or red to orange precipitate, for aromatic carbonyls.

How do you prepare DNPH from chlorobenzene?

2,4-Dinitrophenylhydrazine can be prepared by the reaction of hydrazine with 2,4-dinitrochlorobeneze. The electron-accepting effect of the two nitro groups makes the chloride easy to displace.

What is the reaction of aldehydes and ketones with DNPH?

When testing for aldehydes or ketones, one can use DNPH as a reagent. During this simple test, if an aldehyde or ketone is present a yellow, the orange or reddish-orange precipitate of the dinitrophenylhydrazine appears. A positive result is signaled by a yellow precipitate, for aliphatic carbonyls, and red to orange precipitate, for aromatic carbonyls. When these compounds are brought to their melting point, this confirms the carbonyl compound.

What safety precautions (handling, storage, and disposal) should be taken with DNPH?

DNPH is considered highly sensitive and risks explosion if not handled properly. It is normally supplied and stored in small quantities and in damp conditions to prevent dust forming in the air thus stabilizing the compound.

Like fireworks, civil use explosives (demolition), and even fertilizer, it must be stored in accordance with Explosive Regulations. If kept in a less than airtight container, evaporation may take place over a period and erosion or an explosion can occur due to friction from opening the container. Like food, chemicals also have an expiration date.

Chem Service offers DNPH analytical standards in Neat, Solutions, and Mixtures.

Chem Services offers a wide range of DNPH neat and within solutions and mixtures that have high analytical standards. With years of experience and over 75 different options, you can trust that the Chem Service team will provide the highest quality tests for ketones and aldehydes. DNPH is on sale for the entire month of June 2021. For more information on all of Chem Services, testing options give our seasoned staff a call at 1-800-452-9994.

Sources:

Content provided by Chem Service Inc. Courtesy of JUNE 22, 2021 BOOMTOWN DEVS

• Admin. “2,4 DNP Test (2,4-Dinitrophenylhydrazine).” BYJUS, BYJU’S, 26 Mar. 2021, byjus.com/chemistry/2-4-dinitrophenylhydrazine/.
• Clark, Jim. Addition-Elimination Reactions of Aldehydes and Ketones, Nov. 2015, www.chemguide.co.uk/organicprops/carbonyls/addelim.html.
• Power, Dr. Nicholas. “Brady’s Rogue Reagent?” OpenLearn, The Open University, 7 Nov. 2016, www.open.edu/openlearn/science-maths-technology/science/chemistry/bradys-rogue-reagent.
• “119-26-6 2,4-Dinitrophenylhydrazine.” Cas.chemnet.com, www.chemnet.com/cas/en/119-26-6/2,4-Dinitrophenylhydrazine.html.
• 2,4-Dinitrophenylhydrazine, www.chemeurope.com/en/encyclopedia/2%2C4-Dinitrophenylhydrazine.html.

   

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Acrolein (DNPH Derivatives) Certified Reference Standard

 N-11031-50MG

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Honeywell Hydranal ™ CRM Sodium tartrate dihydrate

Certified reference material for KF titration, produced under DIN EN ISO 17034 accreditation water content ~15.66%, exact value on CoA verified against NIST SRM 2890

HONEYWELL PRODUCT LISTING

Advantages of HYDRANAL- CRM Water Standards:

• For volumetric and coulometric Karl Fischer applications
• Manufactured according to ISO 17034 requirements
• Certificate of Analysis showing the exact water content, expanded uncertainty plus comprehensive product information and instruction for use
• Lot-related stability and homogeneity studies
• Verified against external standards such as NIST SRM 2890 or NMIJ CRM 4222
• Convenient packaging

Specifications 

Properties  

Safety Information      

CONTACT US   

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 About The Author

Susan Massie, Sales & Marketing Director, Greyhound Chromatography and Allied Chemicals Email: sue@greyhoundchrom.com

Susan Massie is the Sales & Marketing Director for Greyhound Chromatography and Allied Chemicals, affectionately known as 'Greyhound' in our scientific community. Greyhound was founded by Susan's husband Paul Massie almost 40 years ago, Susan hasn't been in the business for all of that time but has been involved with Greyhound for over 17 years. Greyhound continues to grow, expanding into new markets and taking on the challenges of our ever changing environment. It's heartwarming to witness the world waking up to the fact that we are damaging our planet on a daily basis. Every action we take has a direct effect on our planet and the world we leave behind for future generations. Susan is passionate about climate change and is happy to work in an industry that can have a direct effect on reducing the impact of our actions on the environment. All of the team at Greyhound take our responsibilities very seriously, the products that we supply are used by the world's leading scientists and chemists as they endeavour to monitor and repair the environment. All is not lost, if we all take responsibility for our actions, from reducing our waste and reusing or recycling our material collateral we can make a difference. The internet is full of useful advice and guidance, Susan is proud to contribute to that wealth of knowledge whenever she can.

Greyhound prides itself on personal service which provides prompt, efficient, cost-effective, safe delivery of all products. Greyhound provides technical advice and distribution of Certified Reference Standards and Materials, Laboratory Consumables, Solvents and Reagents across all scientific disciplines. Greyhound Chromatography offers over 1 Million products from its UK warehouse. The team at Greyhound are proud to support the work of the world's leading scientists and chemists as they challenge the abuse of our planet and try to make a difference to the world we leave behind for our ancestors.

You can view Susan's Linked In Profile here https://www.linkedin.com/in/susan-massie-79ab4121/

Honeywell Hydranal ™ Water Standard Oil

Oil-based standard for Karl Fischer titration (water content approx. 10 ppm, exact value on report of analysis), Box contains 10 glass ampoules of 8 mL

HONEYWELL PRODUCT LISTING

Advantages of HYDRANAL-Water Standards:

• Broad product range for volumetric and coulometric Karl Fischer applications, as well as the indirect oven application
• Manufactured according to ISO 9001 requirements
• Report of Analysis showing the exact water content and expanded uncertainty

Verified against external standards such as NIST SRM 2890 or NMIJ CRM 4222

• Long shelf life (up to five years)
• Convenient packaging
• Supplied with detailed instruction for use

 Specifications 

Properties  

Safety Information      

CONTACT US   

Tel:        +44 (0) 151 649 4000   

Web:     www.greyhoundchrom.com   

Email:   marketing@greyhoundchrom.com   

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CATALOGUE DOWNLOADS   

 About The Author

Susan Massie, Sales & Marketing Director, Greyhound Chromatography and Allied Chemicals Email: sue@greyhoundchrom.com

Susan Massie is the Sales & Marketing Director for Greyhound Chromatography and Allied Chemicals, affectionately known as 'Greyhound' in our scientific community. Greyhound was founded by Susan's husband Paul Massie almost 40 years ago, Susan hasn't been in the business for all of that time but has been involved with Greyhound for over 17 years. Greyhound continues to grow, expanding into new markets and taking on the challenges of our ever changing environment. It's heartwarming to witness the world waking up to the fact that we are damaging our planet on a daily basis. Every action we take has a direct effect on our planet and the world we leave behind for future generations. Susan is passionate about climate change and is happy to work in an industry that can have a direct effect on reducing the impact of our actions on the environment. All of the team at Greyhound take our responsibilities very seriously, the products that we supply are used by the world's leading scientists and chemists as they endeavour to monitor and repair the environment. All is not lost, if we all take responsibility for our actions, from reducing our waste and reusing or recycling our material collateral we can make a difference. The internet is full of useful advice and guidance, Susan is proud to contribute to that wealth of knowledge whenever she can.

Greyhound prides itself on personal service which provides prompt, efficient, cost-effective, safe delivery of all products. Greyhound provides technical advice and distribution of Certified Reference Standards and Materials, Laboratory Consumables, Solvents and Reagents across all scientific disciplines. Greyhound Chromatography offers over 1 Million products from its UK warehouse. The team at Greyhound are proud to support the work of the world's leading scientists and chemists as they challenge the abuse of our planet and try to make a difference to the world we leave behind for our ancestors.

You can view Susan's Linked In Profile here https://www.linkedin.com/in/susan-massie-79ab4121/

Honeywell Water Standards for Karl Fischer Titration

HONEYWELL PRODUCT LISTING

Advantages of HYDRANAL- CRM Water Standards:

• For volumetric and coulometric Karl Fischer applications
• Manufactured according to ISO 17034 requirements
• Certificate of Analysis showing the exact water content, expanded uncertainty plus comprehensive product information and instruction for use
• Lot-related stability and homogeneity studies
• Verified against external standards such as NIST SRM 2890 or NMIJ CRM 4222
• Convenient packaging 

MORE INFORMATION

CONTACT US   

Tel:        +44 (0) 151 649 4000   

Web:     www.greyhoundchrom.com   

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 About The Author

Susan Massie, Sales & Marketing Director, Greyhound Chromatography and Allied Chemicals Email: sue@greyhoundchrom.com

Susan Massie is the Sales & Marketing Director for Greyhound Chromatography and Allied Chemicals, affectionately known as 'Greyhound' in our scientific community. Greyhound was founded by Susan's husband Paul Massie almost 40 years ago, Susan hasn't been in the business for all of that time but has been involved with Greyhound for over 17 years. Greyhound continues to grow, expanding into new markets and taking on the challenges of our ever changing environment. It's heartwarming to witness the world waking up to the fact that we are damaging our planet on a daily basis. Every action we take has a direct effect on our planet and the world we leave behind for future generations. Susan is passionate about climate change and is happy to work in an industry that can have a direct effect on reducing the impact of our actions on the environment. All of the team at Greyhound take our responsibilities very seriously, the products that we supply are used by the world's leading scientists and chemists as they endeavour to monitor and repair the environment. All is not lost, if we all take responsibility for our actions, from reducing our waste and reusing or recycling our material collateral we can make a difference. The internet is full of useful advice and guidance, Susan is proud to contribute to that wealth of knowledge whenever she can.

Greyhound prides itself on personal service which provides prompt, efficient, cost-effective, safe delivery of all products. Greyhound provides technical advice and distribution of Certified Reference Standards and Materials, Laboratory Consumables, Solvents and Reagents across all scientific disciplines. Greyhound Chromatography offers over 1 Million products from its UK warehouse. The team at Greyhound are proud to support the work of the world's leading scientists and chemists as they challenge the abuse of our planet and try to make a difference to the world we leave behind for our ancestors.

You can view Susan's Linked In Profile here https://www.linkedin.com/in/susan-massie-79ab4121/

HONEYWELL PRODUCT LISTING

CONTACT US   

Tel:        +44 (0) 151 649 4000   

Web:     www.greyhoundchrom.com   

Email:   marketing@greyhoundchrom.com   

FOLLOW US   

YOU MAY ALSO BE INTERESTED IN OUR NEWSLETTER   

SIGN UP HERE   

CATALOGUE DOWNLOADS   

 About The Author

Susan Massie, Sales & Marketing Director, Greyhound Chromatography and Allied Chemicals Email: sue@greyhoundchrom.com

Susan Massie is the Sales & Marketing Director for Greyhound Chromatography and Allied Chemicals, affectionately known as 'Greyhound' in our scientific community. Greyhound was founded by Susan's husband Paul Massie almost 40 years ago, Susan hasn't been in the business for all of that time but has been involved with Greyhound for over 17 years. Greyhound continues to grow, expanding into new markets and taking on the challenges of our ever changing environment. It's heartwarming to witness the world waking up to the fact that we are damaging our planet on a daily basis. Every action we take has a direct effect on our planet and the world we leave behind for future generations. Susan is passionate about climate change and is happy to work in an industry that can have a direct effect on reducing the impact of our actions on the environment. All of the team at Greyhound take our responsibilities very seriously, the products that we supply are used by the world's leading scientists and chemists as they endeavour to monitor and repair the environment. All is not lost, if we all take responsibility for our actions, from reducing our waste and reusing or recycling our material collateral we can make a difference. The internet is full of useful advice and guidance, Susan is proud to contribute to that wealth of knowledge whenever she can.

Greyhound prides itself on personal service which provides prompt, efficient, cost-effective, safe delivery of all products. Greyhound provides technical advice and distribution of Certified Reference Standards and Materials, Laboratory Consumables, Solvents and Reagents across all scientific disciplines. Greyhound Chromatography offers over 1 Million products from its UK warehouse. The team at Greyhound are proud to support the work of the world's leading scientists and chemists as they challenge the abuse of our planet and try to make a difference to the world we leave behind for our ancestors.

You can view Susan's Linked In Profile here https://www.linkedin.com/in/susan-massie-79ab4121/

HONEYWELL PRODUCT LISTING

HYDRANAL™ Titrant 2 Reagent for Karl Fischer Titration

Specifications

 Advantages of Hydranal two-component reagents:

• High titration speed
• Ideal accuracy for small amounts of water
• High buffer capacity
• Exact and stable titer
• E-type reagents: reduced toxicity compared to methanol

Specifications

Properties  

Safety Information    

GHS Classification

 GHS02 Flammable           GHS08 Health Hazard              GHS06 Toxic

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Tel:        +44 (0) 151 649 4000   

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 About The Author

Susan Massie, Sales & Marketing Director, Greyhound Chromatography and Allied Chemicals Email: sue@greyhoundchrom.com

Susan Massie is the Sales & Marketing Director for Greyhound Chromatography and Allied Chemicals, affectionately known as 'Greyhound' in our scientific community. Greyhound was founded by Susan's husband Paul Massie almost 40 years ago, Susan hasn't been in the business for all of that time but has been involved with Greyhound for over 17 years. Greyhound continues to grow, expanding into new markets and taking on the challenges of our ever changing environment. It's heartwarming to witness the world waking up to the fact that we are damaging our planet on a daily basis. Every action we take has a direct effect on our planet and the world we leave behind for future generations. Susan is passionate about climate change and is happy to work in an industry that can have a direct effect on reducing the impact of our actions on the environment. All of the team at Greyhound take our responsibilities very seriously, the products that we supply are used by the world's leading scientists and chemists as they endeavour to monitor and repair the environment. All is not lost, if we all take responsibility for our actions, from reducing our waste and reusing or recycling our material collateral we can make a difference. The internet is full of useful advice and guidance, Susan is proud to contribute to that wealth of knowledge whenever she can.

Greyhound prides itself on personal service which provides prompt, efficient, cost-effective, safe delivery of all products. Greyhound provides technical advice and distribution of Certified Reference Standards and Materials, Laboratory Consumables, Solvents and Reagents across all scientific disciplines. Greyhound Chromatography offers over 1 Million products from its UK warehouse. The team at Greyhound are proud to support the work of the world's leading scientists and chemists as they challenge the abuse of our planet and try to make a difference to the world we leave behind for our ancestors.

You can view Susan's Linked In Profile here https://www.linkedin.com/in/susan-massie-79ab4121/