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Hazard Predictions

• Generates heat: Exothermic reaction at ambient temperatures (releases heat)
• Intense or explosive reaction: Reaction may be particularly intense, violent, or explosive

Acetaldehyde reacts violently with phenols (MCA Safety Datasheet 43, Manufacturing Chemists' Association, Washington, 1952; Lewis, R.J., Sr. 1992. Sax's Dangerous Properties of Industrial Materials, 8th Edition. New York: Van Nostrand Reinhold. pp. 5; National Fire Protection Association. 1975. Publication 491M. pp. 6.).

The polymerization reaction between formaldehyde and phenol can accelerate uncontrollably (a "runaway chain reaction"), potentially leading to overpressurization (Daylor, H.D. et al. 1971. Major Loss Prevention in Process Industries (Symposium Series No. 34), London. pp. 46).