Warning! Unfortunately your browser has disabled scripting. Please enable it in order to display this page.
 
RSS

Blog posts of '2021' 'July'

Climbazole Certified Reference Standard CAS 38083-17-9 | Chem Service | Greyhound Chromatography

Chem Service Logo

Climbazole Chemical Structure   N-14339-100MG     Woman Washing Hair

Climbazole Certified reference Standard CAS 38083-17-9

 

You May Also Have An Interest In: 

 

Dinitrophenylhydrazine (DNPH)Certified Reference Standard 

Dinitrophenylhydrazine Chemical Structure 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  

You May Also Have An Interest In:

 

Acrolein (DNPH Derivatives) Certified Reference Standard

 

Acrolein Chemical Structure N-11031-50MG

CONTACT US

Tel:        +44 (0) 151 649 400

Web:     www.greyhoundchrom.com

Email:   marketing@greyhoundchrom.com

FOLLOW US

UK Supplier General Purpose Viscosity Reference Standards | Paragon Scientific | Greyhound Chromatography

General Purpose Viscosity Reference Standards 

Certified in strict accordance with ASTM D2162, the primary method for viscosity standards manufacture. Dual  certified to the International Standards BS EN ISO / IEC 17025 and ISO 17034 under our UKAS accrediatation. We test at Primary level using master viscometers in accordance with ASTM D2162 to ensure the lowest uncertainty of measurement thus providing standards that are certified with primary level accuracy. ASTM D2162 is the only referenced method for the certification of viscosity standards when adopting ASTM test method protocol.

  • Certified according to ISO 17025 / ISO 17034 under our UKAS accreditation
  • Certified in strict accordance with ASTM D2162
  • Density g/mL in accordance with ASTM D1480
  • For use with glass capillary viscometers, automatic viscometers and other viscosity measuring equipment
  • Kinematic (cSt) & dynamic viscosity (mPa·s) given at all temperatures
  • Standard Pack Size 500mL, available also in 5L. Please contact sales@greyhoundchrom.com for other volumes
  • Fully traceable to National Standards
  • Ensures full compliance to ASTM & IP test method protocol
  • Tamper evident security packaging
  • 2 Year shelf life
  • Manufactured in the United Kingdom

Certified Ethanol Standards – % ABV (Alcohol by Volume)

 

Paragon New Product Launch Banner

Paragon Scientific's Certified Ethanol Standards are certified for % ABV (Alcohol by Volume) and are designed to be used for the calibration and/or verification of alcoholmeters or densitometers used to determine alcohol content, and for monitoring analytical perfromance of analyst or methodology.  Each Certified Reference Material (CRM) is dual certified to ISO 17025 and ISO 17034 under Paragon's UKAS accreditiation. 

Importance of Measuring Alcohol Content:

 

It is a typical requirement for alcohol products to be labelled with an alcoholic strength or an alcohol content value, generally a percentage volume of alcohol content. Determining and measuring the
alcohol (ethanol) content is critical for quality control purposes and to ensure the declaration of alcohol content is correct for industry and tax measurements.

 

Accurate and precise measurements will be of critical importance to any distillery to ensure that their products meet the correct alcohol content. Regular calibration and / or verification of the
performance of alcoholmeters or densitometers using certified reference materials helps ensure that laboratories comply with quality control standards and produce reliable results with maximum accuracy.

These Ethanol CRMs are certified in strict accordance to both ISO/IEC 17025 and ISO/IEC 17034 as per our accreditation to the United Kingdom Accreditation Service (UKAS). Manufactured to a
premium quality, Paragon’s dual UKAS accreditation to ISO 17025 and ISO 17034 provides a level of confidence and assurance that international guidelines are followed in the production, labelling,
and assignment of property values to materials, including stability and homogeneity determinations.

Each CRM provides traceability of measurement to recognised national standards, and to units of measurement realised at the National Physics Laboratory (NPL), National Institute of Standards &
Technology (NIST) or other recognised national standards laboratories, so end users can be confident the results are metrologically traceable. The alcohol content is certified in accordance
with the UK Revenue & Customs Laboratory Alcohol Table.

Key Benefits:

  • Certified in strict accordance to ISO 17025 and ISO 17034 under our UKAS accreditation.  
  • Highest level of accreditation guarantee, providing the most credible certified data available
    worldwide.
  • Suitable for the calibration and/or verification of alcoholmeters or densitometers used to determine alcohol content, and for monitoring analytical performance of analyst or
    methodology.
  • Fully traceable to international standards and low levels of uncertainty achieves maximum accuracy of data.
  • Supplied in 25 mL volume, tamper integrity.
  • Manufactureded in the United Kingdom
  • 12 month shelf life

 

Certified Ethanol Standards – % ABV (Alcohol by Volume)

  

ETWA05 Certified Ethanol Standard – 5 % ABV (Alcohol by Volume), UKAS ISO 17025 & ISO 17034 Certified, 25 mL

ETWA15 Certified Ethanol Standard – 15 % ABV (Alcohol by Volume), UKAS ISO 17025 & ISO 17034 Certified, 25 mL

ETWA40 Certified Ethanol Standard – 40 % ABV (Alcohol by Volume), UKAS ISO 17025 & ISO 17034 Certified, 25 mL

ETWA70 Certified Ethanol Standard – 70 % ABV (Alcohol by Volume), UKAS ISO 17025 & ISO 17034 Certified, 25 mL

 

 Paragon Scientific has successfully transitioned from ISO Guide 34 to the new standard ISO/IEC 17034:2016, after their recent assessment from the United Kingdom Accreditation Service (UKAS)

 Paragon UKAS ISO image                          Paragon Scientific Logo

 Paragon Scientific 17025 Accreditation PDF Download 

Historically, Paragon Scientific has been accredited to ISO Guide 34 to prove our competency as a Reference Material Producer. A new standard to replace ISO Guide 34 was published in November 2016, ISO 17034, and it was internationally agreed that there will be a 3-year transitionary period to allow organisations accredited to ISO Guide 34 to move to the new standard.

Paragon Scientific  are happy to announce that we have successfully completed the migration as soon as possible, to ensure customers have the confidence we demonstrate technical competence to the latest international requirements.

 Frequently Asked Questions (FAQ):

"Our methods say we must use ISO Guide 34 products. Can we still buy from Paragon?"

Yes,  you  can.  Our  products  still  meet  or  exceed  the  requirements  of ISO Guide 34, and now meet the higher requirements of ISO/IEC 17034:2016.

 "Some of your products still reference ISO Guide 34. Are they still ok to use?"

Yes, they are.  It will take a short time for us to update our calibration certificates, labels and website, but you can be assured that the products are still produced to the high standards you have come to expect from Paragon Scientific.

 "Why should we use a producer accredited to ISO 17034?"

It demonstrates that the Reference Material Producer has been independently assessed and proven to have the technical competence to produce Reference Materials (RMs), including Certified Reference Materials (CRMs) to International recognised standard.

  Benefits of Using an Accredited ISO 17034:

  • Peace of mind. Our accreditation is proof of our technical competence as a Reference Material Producer, independently assessed by UKAS.
  • Internationally recognised credentials. International standards are essential to global cooperation across multiple industries. Our accredited Certified Reference Materials have the right signatories to prove the claims we make and are traceable to international test methods.
  • Quality Assurance. Purchasing accredited Certified Reference Materials provides an opportunity to improve laboratory efficiency, Quality Control and Assurance.
  • Trusted supplier. Not only can customers feel confident about our products, but can trust Paragon Scientific as a supplier for our technical expertise and delivering excellent customer service.

Why choose Paragon?

 

All of Paragon’s products have been manufactured to the highest certification integrity coupled with premium quality. Every certificate provides low levels of uncertainty of measurement and is fully traceable to international methodology. With an excellent reputation across multiple industries, Paragon provides excellent customer service, technical support and prompt delivery to all its customers.

 Paragon Scientific has always sought to certify its products to the highest metrological level it can achieve, this has been one of its key objectives since the company was founded and has set them apart from other reference material producers.

 

Integrity and Quality has and always will be at the forefront for Paragon Scientific, which is evidenced by their accreditations to ISO 17025 and ISO 17034 under UKAS and the long-standing relationships with end-users and the worldwide partners they work with. Integrity and Quality are embedded across all their business activities and provides the framework in how they approach new ideas and operate.

 

 

 New Products and Product Catalogue

 Paragon New Products image    Paragon New Products image      Paragon New Products image    Paragon Scientific Reference Materials Catalogue Image Paragon Scientific Ethanol Alcohol

 Contact Us!

 Tel:         +44 (0) 151 649 4000     Fax:  +44 (0) 151 649 4001

 Web:     www.greyhoundchrom.com

 Email:    info@greyhoundchrom.com

Follow us!

Facebook LogoTwitter Logo You Tube Logo Linked In Logo

 You may also be interested in 

Greyhound Chromatography Syringe Filters  Greyhound Chromatography ZPure Filters   Wellington Laboratories Catalogue Image   Chem Service Catalogue Image   Chem Service Pesticides Catalogue Image High Purity Standards 2019 Catalogue Greyhound Chromatography Reference Standards Guide

Chem Service Certified reference Standards and Materials | Greyhound Chromatography

15% OFF CHEM SERVICE PRODUCTS

Chem Service 15% off

Greyhound Chromatography are currently offering 15% off ALL Chem Service products (excluding PCB's) until 31st August 2021. 

You must quote discount code: CHEM15 when placing your order. 

*This discount will not be valid with any other offer*

BROWSE DISCOUNTED PRODUCTS HERE

Chem Service, Inc. produces high purity standards for use as reference materials and for other laboratory purposes. More than 95% of the Standards Grade materials have a certified purity of 98.0% or greater and do not require purity corrections when preparing solutions for use with EPA, USTM, UST, and numerous other international methods. You can trust that Chem Service high purity standards are a quality product.

Chem Service accreditation:

         ISO 9001:2015    ISO/IEC 17025:2107    ISO Guide 34:2016

Chem Service catalogues:

Chem Service General Catalogue 2020       Chem Service Pesticide Catalogue 2019      Chem Service Pesticides for Cannabis

Native 3,6-Dichloro-9H-[13C12]carbazole | Wellington Laboratories | Greyhound Chromatography
Native 3,6-Dichloro-9H-[13C12]carbazole | Greyhound Chromatography
Dual Piston HPLC Pumps UK Supplier | Greyhound Chromatography Laboratory Consumables
Where to Buy Dual Piston HPLC Pumps | Greyhound Chromatography Laboratory Consumables
Suppliers of ISO - 2000 Isocratic HPLC Pump | Greyhound Chromatography HPLC Consumables
Suppliers of ISO - 2000 Isocratic HPLC Pump | Greyhound Chromatography HPLC Consumables
ISO-1000 Isocratic HPLC Pumps Uk Supplier | Greyhound Chromatography
Where to Buy ISO-1000 Isocratic HPLC Pumps | Greyhound Chromatography HPLC Supplies
ISO-100 Isocratic HPLC Pumps UK Supplier | Greyhound Chromatography
UK Supplier of ISO-100 Isocratic HPLC Pumps | Greyhound Chromatography Consumables Specialist
Ultra High Pressure (UHP) HPLC Pumps UK Supplier | Greyhound Chromatography
For Sale at Greyhound - Ultra High Pressure (UHP) HPLC Pumps | Greyhound Chromatography
Chromatography Supplies HPLC Solvent Safety Caps | Greyhound Chromatography

Solvent Safety Caps

HPLC Safety Caps from Greyhound Chromatography

          

            

AIT France presents its own Smart Caps range to suit your HPLC system at best. This range offers you two solutions: - Smart Healthy Caps-Smart Waste Caps

Smart Healthy caps are manufactured in response to modern laboratory safety regulations.

They are made of inert materials resistant to chemicals.

The use of a one-way air check valve allows for low cost safe and secure solvent extraction in your laboratory.


• No solvent evaporation
• Keep your concentration accurate for several days
• No mobile phase external contamination


AIT France offers a diversified range of activated charcoal cartridge for the emission of eluent and solvent vapours; by special charcoal impregnation, the cartridges become an excellent barrier against concentrated acids or bases.


A Smart Waste Cap forms an airtight cap, drilled with a variable number of holes to host effluents tubes outgoing from the HPLC system.

The main piece is a cartridge filled with activated charcoal attached to the cap. This filter allows the absorption of 98% of the solvent's vapours released by the solvent's can.

There are many size and configuration options available to suit your personal needs. Please refer to the catalogue for full products details.


If you have any questions regarding AIT products, please do not hesitate to contact us at sales@greyhoundchrom.com


Greyhound Chromatography is pleased to supply AIT's Smart Caps to Research and Analysis laboratories worldwide. For product information and selection assistance please contact

 

          AIT Logo

            

AIT France presents its own Smart Caps range to suit your HPLC system at best. This range offers you two solutions: - Smart Healthy Caps-Smart Waste Caps

Smart Healthy caps are manufactured in response to modern laboratory safety regulations.

They are made of inert materials resistant to chemicals.

The use of a one-way air check valve allows for low cost safe and secure solvent extraction in your laboratory.


• No solvent evaporation
• Keep your concentration accurate for several days
• No mobile phase external contamination


AIT France offers a diversified range of activated charcoal cartridge for the emission of eluent and solvent vapours; by special charcoal impregnation, the cartridges become an excellent barrier against concentrated acids or bases.


A Smart Waste Cap forms an airtight cap, drilled with a variable number of holes to host effluents tubes outgoing from the HPLC system.

The main piece is a cartridge filled with activated charcoal attached to the cap. This filter allows the absorption of 98% of the solvent's vapours released by the solvent's can.

There are many size and configuration options available to suit your personal needs. Please refer to the catalogue for full products details.


If you have any questions regarding AIT products, please do not hesitate to contact us at sales@greyhoundchrom.com


Greyhound Chromatography is pleased to supply AIT's Smart Caps to Research and Analysis laboratories worldwide. For product information and selection assistance please contact

 

Q-Fil Certified Syringe Filters

Q-Fil Certified Syringe Filters set the new Quality standard for today’s laboratory syringe filters Manufactured from the highest quality medical grade high density polypropylene, Q-Fil Certified Syringe Filters provide excellent chemical compatibility with acids, alcohols, bases, ethers, glycols, ketones and oils, with maximum operating temperatures of 135°C.

Every colour-coded filter is printed with the individual batch number, details of the membrane material and its pore size, on the outside rim of the filter, making them unique for traceability, GLPs and validation purposes.

BUY HERE

Colour coded Syringe Filters

Why filter your samples for HPLC?

• To protect the HPLC column, the column inlet frits and capillary columns against blockage (plugging) caused by particulate matter in the sample
• To protect injection valves from damage caused by scratching and wear of the valves internal components, caused by harmful particulate matter in the unfiltered sample, thereby reducing instrument downtime.

 

About our Quality Control procedures

• Every batch of filters is tested by an independent laboratory to ISO 17025 quality procedures

• Every individual Q-Fil Certified Syringe Filter is visually inspected to ensure it meets our manufacturing and quality control specifications
• Samples of all our syringe filters and their respective raw technical data are stored for a period of 5 years from the date of manufacture for future reference
• Each batch of filters is tested prior to release for
- External Dimensions
- Bubble Point
- Burst Pressure
- Filter Integrity
- Water Flow Rate
- UV Extractables and compliance with all technical procedures

 

Why use Greyhound Q-Fil Certified Syringe Filters?

• Q-Fil Certified Syringe Filters are manufactured in compliance with ISO 9001:2000 quality procedures

• Every box is supplied with a Certificate of Analysis and Conformance to guarantee its batch to batch quality and performance
• The unique encapsulating process developed for these filters, forces the sample to pass only through the membrane, thus avoiding the possibility of leaks or contamination
• Available in the most popular sizes, porosities and membrane types
• Excellent resistance to all routinely used HPLC solvents
• Filter housings are manufactured from high density medical grade polypropylene
• Extremely low level of extractables for highly sensitive work
• Luer connections fully comply with ISO 594-1
• Filters are available with standard and ‘SlimTip’ sized outlets

 

Selecting the right Q-Fil Certified Syringe Filter

• Choose the size of filter based on the volume of sample to be filtered

• Choose the filters porosity based on the size of the potential particulates in the sample. It is important to be aware that the finer the porosity of the membrane the greater the pressure will be required to pass the sample through the filter. A sample containing large quantities of particulates is best filtered using a filter with a built-in glass fibre pre-filter
• Choose the type of membrane based on the solvent being filtered.


Filter Sizes


All our filters have female Luer Lock inlets and are available in three diameters -

25mm Diameter
Designed for large sample volumes or solvent filtration
Wide cross sectional area 3.55cm2
Maximum filtration volume >10ml
Maximum operating pressure 550 Kpa

13mm Diameter
Suitable for most applications
Filtration area of 0.95cm2
Maximum filtration volume 1 to 10ml Maximum operating pressure 750 Kpa Now available with ‘SlimTip’ (ST) outlet

4mm Diameter
Suitable for most applications Ideal for small samples <1ml Pore sizes of 0.20µm and 0.45µm
SlimTip Filters (ST)
13mm diameter syringe filters are now available with the new ‘SlimTip’ outlet for direct filling of microvials.

 

Pore Sizes


Q-Fil Certified Syringe Filters are available in 0.20µm and 0.45µm pore sizes. The 0.20µm filters remove the smallest particulates whilst the 0.45µm filters are designed to remove particulates which would be detrimental to most analytical columns.


Pre-filters (page 6) have a glass microfibre membrane which is chemically inert and resists most solvents. Q-Fil glass microfibre pre-filters are recommended for removing large particulates from the sample and are ideal for dissolution tests.

Glass microfibre membranes are also available mounted before the microporous filter membrane in the polypropylene housing. The glass pre-filter removes the larger particulates and prevents premature clogging of the filter.

 

CONTACT US 

Tel:        +44 (0) 151 649 4000 

Web:     www.greyhoundchrom.com 

Email:   marketing@greyhoundchrom.com 

FOLLOW US 

Facebook Icon Twitter Icon Instagram Icon LinkedIn Icon  

YOU MAY ALSO BE INTERESTED IN OUR NEWSLETTER 

SIGN UP HERE 

Greyhound Monthly Newsletter 

CATALOGUE DOWNLOADS 

Greyhound Q-Fil catalogue  Greyhound reference standards guide  Greyhound Zpure Catalogue  Trajan GC Supplies catalogue  Greyhound Chromatography HPLC Pumps

 

 

 

 

About the Author

Susan Massie, Marketing Director Greyhound Chromatography Image

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

Susan Massie is the 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/