Transparent crystals or white crystalline solid with a pleasant odor resembling the odor of chloroform.
Org synthesis, disinfectant, nonluminous, odorless fuel.
Registry Numbers and Inventories.
EC Index Number
Mutagen; Reproductive Effector
Swiss Giftliste 1
Japan ENCS (MITI)
Melting point, °C
60 - 62
Boiling point, °C
Vapor pressure, mmHg
13 (25 C)
Vapor density (air=1)
1.17 g/cm3 (20 C)
Solubility in water
0.94 cp (260 C)
Heat of fusion
Heat of vaporization
Heat of combustion
Hazards and Protection.
Store in cool, dry, well-ventilated place away from sources of heat and ignition. Separate from combustibles, and acidic, alkaline, and oxidizing materials. Paraformaldehyde
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Wear appropriate protective gloves, clothing and goggles.
Wear a NIOSH-approved half face respirator equipped with an organic vapor/acid gas cartridge (specific for organic vapors, HCl, acid gas and SO2) with a dust/mist filter.
If you spill this chemical, you should dampen the solid spill material with water, then transfer the dampened material to a suitable container. Use absorbent paper dampened with water to pick up any remaining material. Seal your contaminated clothing and the absorbent paper in a vapor-tight plastic bag for eventual disposal. Wash all contaminated surfaces with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.
Stable, cyclic trimer of formaldehyde.
May react with oxidizing matter.
Upper exp. limit, %
Lower exp. limit, %
Fires involving this compound should be controlled with a dry chemical, carbon dioxide or Halon extinguisher.
This chemical is combustible.
Fire may produce irritating and/or toxic gases.
Shock may develop with severe exposures. Rapid breathing may develop in patients with metabolic acidosis. Reduction in body temperature may be seen. Lethargy and coma may occur following large ingestions or marked inhalation exposure. Formaldehyde has not been shown definitely to be teratogenic in animals. Formaldehyde probably presents little or no risk as a potential human teratogen.
Nausea, vomiting, and severe abdominal pain may occur following ingestion. Corrosive gastritis, hematemesis, and edema and ulceration of the esophagus may occur. Strictures and perforation are possible delayed complications.
Allergic dermatitis and rash may occur.
DO NOT INDUCE VOMITING. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. Be prepared to transport the victim to a hospital if advised by a physician.
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.