Formaldehyde (paraformaldehyde) 20% aqueous solution (DG)

A more efficient and rapid penetrant fixative used in combination with Glutaraldehyde and Acrolein fixatives

Formaldehyde solution 20%, 16%, 8%, and 4%, EM Grade is prepared from paraformaldehyde (polymerised formaldehyde). This saves much effort, as the laboratory prepared material must be used on the day it's made. The product is methanol free. An excellent, rapidly penetrating fixative. It may be used in combination with glutaraldehyde and acrolein fixatives, and is frequently used as an alternative to glutaraldehyde. The solution is not affected by UV light and it is preferable not to refrigerate, until buffer is added. 

Excellent shelf-life of over two years. Useable until precipitate occurs. Easy to break, pre-scored, 10ml ampoules sealed under inert gas. 100ml and 1L bottles available.

Storage - Unopened bottles can be stored at room temperature for at least 5 years. After opening, the solution can be stored in the original bottle for at least a month at 4°C, protected from light.  Can also be stored successfully at - 20 °C for months to years.

Note: Below 10% concentration this item may be shipped as non-dangerous goods and can be taken in check-in luggage on aircraft.

Other concentrations are available - See All Paraformaldehyde 

**  The 1L bottle will incur a $35 surcharge for DG shipping per delivery.

Safety Data Sheet - C004