The Chinese manufacturer of Glyoxal 40% share with you how to deal with Glyoxal 40% leakage

Leakage emergency treatment

Evacuate the personnel in the contaminated area to a safe area quickly, isolate them, and strictly restrict access. Cut off the ignition source. It is recommended that emergency treatment personnel wear self-contained positive pressure respirators and gas protective clothing. Cut off the source of leakage as much as possible. If it is liquid, prevent it from flowing into restricted spaces such as sewers and flood discharge ditches.

Small amount of leakage: 

Mix with sand, dry lime or soda ash. A large amount of water can also be used for flushing, and the diluted washing water will be put into the wastewater system.

Large amount of leakage: 

Build a dike or dig a pit to receive. Cover with foam to reduce steam disaster. Transfer to tank car or special collector with pump, and recycle or transport to waste disposal site for disposal. If solid, mix with sand, dry lime or soda ash. In case of a large amount of leakage, it shall be collected and recycled or transported to the waste disposal site for disposal.