National Scientific 2008-9 Catalogue
This catalogue contains product details of products from National Scientific. If you have any questions about National Scientific products or wish to discuss the pricing and delivery of products from this manufacturer, or any of the many other Manufacturers we represent, please do not hesitate to contact us either by email Sales@greyhoundchrom.com or rachel@greyhoundchrom.com (Greyhound Chromatography’s Sales Manager). We are proud of our long-standing relationships with our customers and agents. We value our agent network highly and are constantly looking to appoint new agents with the right expertise, in areas where we are not represented. Please email sales@greyhoundchrom.com if you are interested in becoming one of our agents. Visit https://www.greyhoundchrom.com for a full range of Chromatography consumables, including Certified Reference Standards and Materials, Solvents, Reagents and Laboratory Chemicals.
This catalogue contains product details of products from National Scientific. If you have any questions about National Scientific products or wish to discuss the pricing and delivery of products from this manufacturer, or any of the many other Manufacturers we represent, please do not hesitate to contact us either by email Sales@greyhoundchrom.com or rachel@greyhoundchrom.com (Greyhound Chromatography’s Sales Manager).
We are proud of our long-standing relationships with our customers and agents. We value our agent network highly and are constantly looking to appoint new agents with the right expertise, in areas where we are not represented. Please email sales@greyhoundchrom.com if you are interested in becoming one of our agents.
Visit https://www.greyhoundchrom.com for a full range of Chromatography consumables, including Certified Reference Standards and Materials, Solvents, Reagents and Laboratory Chemicals.
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Technical Information<br />
Properties of Glass<br />
Vials and inserts from <strong>National</strong> <strong>Scientific</strong> are manufactured from the highest-quality borosilicate glass, selected for its purity and dimensional stability.<br />
Clear glass products are manufactured from 33 expansion borosilicate glass with a low coefficient of expansion and very high resistance to chemical attack.<br />
It has low alkali content and is free of elements from the calcium, magnesium, and zinc group of heavy metals. The total of combined oxides of arsenic and<br />
antimony is less than 0.005%. 33 expansion borosilicate glass meets the requirements for Type I Class A glass of ASTM E438.<br />
Amber glass products are manufactured from N-51A borosilicate glass, which has a relatively low coefficient of expansion and high chemical durability.<br />
N-51A borosilicate glass meets the requirements for Type I Class B glass of ASTM E438.<br />
Approximate Chemical Composition for Borosilicate Glass<br />
33 EXPANSION CLEAR GLASS N-51A AMBER GLASS<br />
Silicon Dioxide (SiO 2 ) 80% 72%<br />
Boron Oxide (B 2 O 3 ) 13% 12%<br />
Aluminum Oxide (Al 2 O 3 ) 3% 7%<br />
Calcium Oxide (CaO) 0.1% 1%<br />
Magnesium Oxide (MgO) Not Detected Not Detected<br />
Sodium Oxide (Na 2 O) 4% 6%<br />
Potassium Oxide (K 2 O) 0.1% 2%<br />
Barium Oxide (BaO)
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