10% NEUTRAL (pH 7) BUFFERED (Phosphate) FORMALIN

 

To make one gallon (4+ liters):

Sodium Phosphate dibasic
33 g
Sodium Phosphate monobasic
16 g
Formaldehyde (stock 37%)
400 ml
D'H2O
3600 ml

Add formaldehyde to 1600 ml D'H2O; add phosphates and dissolve with stirring. Add additional 2000 ml D'H2O, mix and check pH. Adjust with 10N NaOH or 1N HCl.