Glutaraldehyde EM Grade, 25% Aqueous Solution, different packing units

Glutaraldehyde - The Highest Purity

OCHCH2CH2CH2CHO F.W. 100.12 CAS #111-30-8
Specific Gravity @20/20°C: 1.131

EM Grade Distillation Purified
• The Universal Fixative for Electron Microscopy
• Purified to EM Grade from commercial grade by "all-glass vacuum-distillation"
• HIGHEST PURITY - free from polymers and other contaminants
• Each lot is tested and assayed before shipping to guarantee its purity
• Sealed under dry nitrogen
• Refrigerated prior to shipment

After purification of glutaraldehyde to EM grade there is a high risk of polymerizing if not handled properly. We take special precautions to assure a polymer-free, pure glutaraldehyde.

Every lot of EM grade aqueous glutaraldehyde is assayed prior to shipping assuring consistent purity and the highest possible quality. If stored properly the glutaraldehyde has a very long shelf life.

Aqueous glutaraldehyde is packed in 10 ml single dose ampoules, sealed under dry nitrogen and kept refrigerated until shipment. Glutaraldehyde is offered in a wide range of percentages to simplify mixing procedures and avoiding waste.

IMPORTANT:
EM grade aqueous glutaraldehyde, stored in volumes greater than 100 ml, with repeated defrosting and recapping, will polymerize in time, producing an absorption peak of 235nm rather than the 280nm of pure EM grade. The presence of polymerized glutaraldehyde highly reduces its cross-linking efficiency, preventing proper fixation. Therefore iglutaraldehyde is only provided in 10ml ampoules or 100ml bottles for larger applications.