the aldehydes introduced in this paper and the more appropriate concentrations for their general use as fixatives are : 4 to 6.5 per cent glutaraldehyde , 4 per cent glyoxal , 12.5 per cent hydroxyadipaldehyde , 10 per cent crotonaldehyde , 5 per cent pyruvic aldehyde , 10 per cent acetaldehyde , and 5 per cent methacrolein .
C0017992
glyoxal
C0034338
pyruvic aldehyde