S-Trioxane

  • 1,3,5-Trioxacyclohexane
  • Trioxymethylene
  • Triformol
  • Trioxan
  • 1,3,5-Trioxane
Formula
C3H6O3
Structure
Description
Transparent crystals or white crystalline solid with a pleasant odor resembling the odor of chloroform.
Uses
Org synthesis, disinfectant, nonluminous, odorless fuel.

Registry Numbers and Inventories.
CAS
110-88-3
EC (EINECS/ELINCS)
203-812-5
EC Index Number
605-002-00-0
EC Class
Harmful
RTECS
YK0350000
RTECS class
Mutagen; Reproductive Effector
UN (DOT)
1325
Merck
12,9863
Beilstein/Gmelin
102769
Beilstein Reference
5-19-09-00103
Swiss Giftliste 1
G-2690
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C3H6O3
Formula mass
90.08
Melting point, °C
60 - 62
Boiling point, °C
114.5
Vapor pressure, mmHg
13 (25 C)
Vapor density (air=1)
3.1
Density
1.17 g/cm3 (20 C)
Solubility in water
Soluble
Viscosity
0.94 cp (260 C)
Heat of fusion
15.1 kJ/mol
Heat of vaporization
57.9 kJ/mol
Heat of combustion
-1519 kJ/mol

Hazards and Protection.
Storage
Store in cool, dry, well-ventilated place away from sources of heat and ignition. Separate from combustibles, and acidic, alkaline, and oxidizing materials. Paraformaldehyde
Handling
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.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
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.
Small spills/leaks
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.
Disposal code
3
Stability
Stable, cyclic trimer of formaldehyde.
Incompatibilities
May react with oxidizing matter.

Fire.
Flash Point,°C
45
Autoignition, °C
410
Upper exp. limit, %
28.7
Lower exp. limit, %
3.6
Fire fighting
Fires involving this compound should be controlled with a dry chemical, carbon dioxide or Halon extinguisher.
Fire potential
This chemical is combustible.
Combustion products
Fire may produce irritating and/or toxic gases.
Health
2
 
Flammability
2
 
 
Reactivity
0
 

Health.
Poison_Class
4
Exposure effects
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.
   Ingestion
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.
   Skin
Allergic dermatitis and rash may occur.
   Eyes
See Skin.

First aid
 
   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.
   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.
   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.
   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.

Transport.
UN number
1325
Response guide
Hazard class
4.1
Packing Group
II; III
 
USCG CHRIS Code
TRO
 
HS Code
2912 50 00
 
IMO Pollution Category
D
IMO Hazard code
S