[Histonet] Difference between Neutral Buffered Formalin 10% and NB formaldehyde 3.7 to 4%

[William]

Oh dear. Yes they are the same. 

Sent from my iPhone

On Oct 5, 2011, at 4:03 PM, Jenny Vega <histotech411 <@t> gmail.com> wrote:

> Ok I want to know the diferrence between Neutral Buffered Formalin 10% and
> NB formaldehyde 3.7 to 4% . I was taugh at college that they were the same
> thing and in the book from Frieda Carson it says that but my supervisor
> swears they are different chemicals. In the laboratory she has used 10%
> neutral buffered formalin all the time, but when we ran out of it  we were
> sent NB formaldehyde 3.7 to 4 %she sent it back and we were sent NB
> formaldehyde 3.7 to 4% once again. She says that 10% NBF is more
> concentrated and pure than 3.7 to 4 % formaldehyde and that the tissues are
> going to  putrefied if they are put in that solution.
> 
> Am I wrong or is she wrong? thanks
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