Contact with acids liberates very toxic gas. Use appropriate laboratory safety precautions. Adjust to pH 7.4 0.2 and filter through a 0.45 m filter. Formaldehyde is harmful by inhalation, in contact with skin, and if swallowed. It is irritating to eyes and skin.
Exposure can cause cancer.
Possible risks of irreversible effects. May cause sensitization by skin contact. Keep locked up and out of the reach of children. Keep away from food, drink, and animal feedingstuff. Wear suitable protective clothing and gloves.