1,3,5-Trioxane

H228: Flammable solid [Danger Flammable solids]

H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]

H361d ***: Suspected of damaging the unborn child [Warning Reproductive toxicity]

P203, P210, P240, P241, P261, P271, P280, P304+P340, P318, P319, P370+P378, P403+P233, P405, and P501 (click each P-code to see the statement)

H228 (100%): Flammable solid [Danger Flammable solids]

H335 (100%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]

H361 (99.3%): Suspected of damaging fertility or the unborn child [Warning Reproductive toxicity]

Aggregated GHS information provided per 285 reports by companies from 14 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.

H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]

H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]

P210, P240, P241, P260, P264, P270, P280, P308+P316, P319, P321, P370+P378, P405, and P501 (click each P-code to see the statement)

H336: May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects]

H360: May damage fertility or the unborn child [Danger Reproductive toxicity]

H373: May causes damage to organs through prolonged or repeated exposure [Warning Specific target organ toxicity, repeated exposure]

P203, P260, P261, P271, P280, P304+P340, P318, P319, P403+P233, P405, and P501 (click each P-code to see the statement)

H361d: Suspected of damaging the unborn child [Warning Reproductive toxicity]

EYES: 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.

SKIN: 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.

INHALATION: 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; if not available, use a level of protection greater than or equal to that advised under Protective Clothing.

INGESTION: 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. If the victim is convulsing or unconscious, do not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side with the head lower than the body. DO NOT INDUCE VOMITING. IMMEDIATELY transport the victim to a hospital. (NTP, 1992)

Fires involving this compound should be controlled with a dry chemical, carbon dioxide or Halon extinguisher. (NTP, 1992)

USE WATER SPRAY, CARBON DIOXIDE, DRY CHEM OR "ALCOHOL" FOAM. WATER SPRAY MAY BE USED TO FLUSH SPILLS AWAY FROM EXPOSURES. /PARAFORMALDEHYDE/

WATER SPRAY MAY BE USED TO EXTINGUISH THE FIRE BECAUSE MATERIAL CAN BE COOLED BELOW ITS FLASH POINT.

ALCOHOL FOAM.

Excerpt from ERG Guide 133 [Flammable Solids]:

IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area for at least 25 meters (75 feet) in all directions.

LARGE SPILL: Consider initial downwind evacuation for at least 100 meters (330 feet).

FIRE: If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2024)

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

Incineration & landfill: Mix with a combustible solvent and incinerate using an afterburner or bury in an approved landfill.

SMALL SPILLS AND LEAKAGE: 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.

STORAGE PRECAUTIONS: You should protect this chemical from exposure to light. Keep the container tightly closed under an inert atmosphere, and store under refrigerated temperatures. This compound is a Schedule IV DEA Controlled Substance and is to be stored according to State and Federal Regulations. Refer to Code of Federal Regulations Title 21 Part 1300 to End. (NTP, 1992)

STORE IN COOL, DRY, WELL-VENTILATED PLACE AWAY FROM SOURCES OF HEAT & IGNITION. SEPARATE FROM COMBUSTIBLES, & ACIDIC, ALKALINE, & OXIDIZING MATERIALS. /PARAFORMALDEHYDE/

RECOMMENDED RESPIRATOR: Where the neat test chemical is weighed and diluted, 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. (NTP, 1992)

Transparent crystals or white crystalline solid with a pleasant odor resembling the odor of chloroform. Melts at 62 °C; boils at 115 °C without polymerization. The cyclic trimer of formaldehyde.

Large Crystals; Other Solid

White solid with a chloroform-like odor; [HSDB] White crystalline powder; [MSDSonline]

CRYSTALLINE SOLID

RHOMBIC NEEDLES FROM ETHER

CHARACTERISTIC CHLOROFORM-LIKE ODOR

238.1 °F at 759 mmHg (NTP, 1992)

114.5 °C @ 759 MM HG

147 °F (NTP, 1992)

113 °F (NTP, 1992)

greater than or equal to 100 mg/mL at 68 °F (NTP, 1992)

SOL IN WATER: 17.2 G/100 ML @ 18 °C, 21.2 @ 25 °C; EASILY SOL IN ALC, KETONES, ETHER, ACETONE, ORG SOLVENTS, CHLORINATED & AROMATIC HYDROCARBONS; SLIGHTLY SOL IN PENTANE, PETROLEUM ETHER, LOWER PARAFFINS

SOL IN BENZENE, CARBON TETRACHLORIDE, CHLOROFORM, CARBON DISULFIDE

1.17 at 149 °F (NTP, 1992) - Denser than water; will sink

1.17 @ 65 °C

3.1 (NTP, 1992) - Heavier than air; will sink (Relative to Air)

13 mmHg at 77 °F (NTP, 1992)

13.0 [mmHg]

STABLE, CYCLIC TRIMER OF FORMALDEHYDE

777 °F (NTP, 1992)

ON DISTILLATION WITH WATER, FORMS AZEOTROPE BOILING @ 91.4 °C CONTAINING APPROX 70% TRIOXANE BY WT

SUBLIMES READILY; SLOWLY DEPOLYMERIZED BY STRONG ACIDS IN AQ SOLN; INERT TO ALKALIES

Dunham energy parameter

Schoenflies notation

Boiling point

Centrifugal distortion

Chemical bond

Chemical shift

Composition

Crystal structure

Dielectric constant

Electric dipole moment

Formula unit

Formula weight

Fusion temperature

Heat of sublimation

Hindering potential

Internuclear distance

Lineshape

Melting temperature

Highly flammable. Water soluble.

Highly Flammable

1,3,5-TRIOXANE is stable under normal laboratory conditions but is unstable in the presence of acids, which initiate polymerization. Sublimes readily. May react with oxidizing matter (NTP, 1992). A stable polymeric product of formaldehyde that in the presence of strong aqueous acids will depolymerize (reforming the parent formaldehyde). Inert to strong alkalis. Readily converted in non aqueous solutions to the monomeric formaldehyde by small concentrations of acid---the rate of conversion is directly proportional to the concentration of the acid.

1,3,5-Trioxane

D*: Other compounds that may form peroxides

Bretherick's

Contact detonation occured while trying to break up clumps of trioxane. See Bretherick's.

LC50 (rat) > 10,463 ppm

SEE FORMALDEHYDE. 1. ADMIN BY MOUTH 1 OR MORE OF FOLLOWING: WATER, MILK, 0.2% AMMONIA WATER...AMMONIUM ACETATE (3 TEASPOONSFUL IN WATER), EGG WHITES, ACTIVATED CHARCOAL. AMMONIUM SALTS ARE PROBABLY BEST BECAUSE THEY TRANSFORM FORMALDEHYDE INTO METHENAMINE... /FORMALDEHYDE/

SEE FORMALDEHYDE. 2. DEMULCENTS: MILK, EGGS, ALUMINUM HYDROXIDE GELS. 3. MORPHINE FOR CONTROL OF PAIN... 4. COMBAT SHOCK BY IV ADMIN OF ISOTONIC SALINE, PLASMA, OR WHOLE BLOOD... 5. TO CORRECT ACIDOSIS, GIVE SODIUM BICARBONATE OR M/6 SODIUM LACTATE SOLN IV... 6. ARTIFICIAL RESP, IF INDICATED... /FORMALDEHYDE/

SEE FORMALDEHYDE. 7. PENICILLIN OR OTHER ANTIBIOTIC IF INFECTION APPEARS... 8. WASH AFFECTED SKIN WITH LARGE QUANTITIES OF SOAP & WATER. LAB. URINALYSIS MAY REVEAL RED BLOOD CELLS (SOMETIMES GROSS HEMATURIA) & CASTS. /FORMALDEHYDE/

MALE & FEMALE 4TH YR DENTAL STUDENTS SHOWED HIGH INCIDENCE OF LATENT ALLERGIES, 65% COMPARED TO 13.6% FOR SAME STUDENTS @ END OF 2ND YR. ATTRIBUTED TO EXPOSURE TO ALLERGY-PRODUCING SUBSTANCES SUCH AS TRIOXYMETHYLENE.

SAME INTERNAL TOXICITY AS FORMALDEHYDE, WHICH IT SLOWLY RELEASES AT BODY TEMP.

SEE FORMALDEHYDE. SYMPTOMATOLOGY: A. INHALATION. 1. IRRITATION OF MUCOUS MEMBRANES, ESP OF EYES, NOSE & UPPER RESP TRACT. 2. WITH HIGHER CONCN, COUGH, DYSPHAGIA, BRONCHITIS, PNEUMONIA, EDEMA OR SPASM OF LARYNX. /FORMALDEHYDE/

SEE FORMALDEHYDE. SYMPTOMATOLOGY: B. INGESTION. 1. ...PAIN IN MOUTH, PHARYNX & STOMACH. 2. NAUSEA, VOMITING, HEMATEMESIS, ABDOMINAL PAIN, &...DIARRHEA (WHICH MAY BE BLOODY). 3. ...SHOCK. 4. DIFFICULT MICTURITION, HEMATURIA, ANURIA. 5. VERTIGO, CONVULSIONS...COMA. 6. DEATH DUE TO RESP FAILURE. /FORMALDEHYDE/

SEE FORMALDEHYDE. SYMPTOMATOLOGY: SKIN CONTACT. 1. IRRITATION & HARDENING OF SKIN. STRONG SOLN PRODUCE COAGULATION NECROSIS. 2. DERMATITIS & HYPERSENSITIVITY FROM PROLONGED EXPOSURE. /FORMALDEHYDE/

PARAFORM INTRODUCES BOTH A DUST & A FORMALDEHYDE GAS EXPOSURE... /PARAFORM/

PARAFORM INTRODUCES BOTH A DUST & A FORMALDEHYDE GAS EXPOSURE... /PARAFORM/

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

Incineration & landfill: Mix with a combustible solvent and incinerate using an afterburner or bury in an approved landfill.

Flammable Solid