Dimethoxane

  • Acetomethoxan
  • Acetomethoxane
  • 6-Acetoxy-2,4-dimethyl-meta-dioxane
  • 6-Acetoxy-2,4-dimethyl-1,3-dioxane
  • DDOA
  • 2,4-Dimethyl-6-Acetoxy-1,3-dioxane
Formula
C8H14O4
Structure
Description
Clear light yellow to light amber slightly viscous liquid with a mustard-like odor.
Uses
Preservative for cutting oil, resin emulsions, water-based paints, cosmetics, inks. Effective range of concn: 0.03-0.1%. Gasoline additive.

Registry Numbers and Inventories.
CAS
828-00-2
EC (EINECS/ELINCS)
212-579-9
RTECS
AH1350000
RTECS class
Tumorigen; Mutagen
Merck
12,3273
Beilstein/Gmelin
128710
Beilstein Reference
4-19-00-00641
EPA OPP
1001
Swiss Giftliste 1
G-6863
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C8H14O4
Formula mass
174.2
Melting point, °C
-25
Boiling point, °C
212
Vapor pressure, mmHg
0.2 (25 C)
Density
1.0655 g/cm3 (20 C)
Solubility in water
Soluble
Refractive index
1.431 (20 C)
Partition coefficient, pKow
0.48
Heat of vaporization
44.9 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
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
If Tyvek-type disposable protective clothing is not worn during handling of this chemical, wear disposable Tyvek-type sleeves taped to your gloves.
Respirators
Wear a NIOSH-approved half face respirator equipped with a combination filter cartridge, i.e. organic vapor/acid gas/HEPA (specific for organic vapors, HCl, acid gas, SO2 and a high efficiency particulate filter).
Small spills/leaks
If you should spill this chemical, use absorbent paper to pick up all liquid spill material. Seal the absorbent paper, as well as any of your clothing which may be contaminated, in a vapor-tight plastic bag for eventual disposal. Wash any surfaces you may have contaminated 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.
Stability
Hydrolyzes in aqueous solution to produce acetic acid and corresponding free alcohol.
Incompatibilities
Incompatible with strong acids and strong bases.

Fire.
Flash Point,°C
83
Fire fighting
Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher.
Fire potential
This chemical is combustible.

Health.
Poison_Class
4
Exposure effects
   Ingestion
See inhalation.
   Inhalation
Symptoms of exposure to this compound may include irritation of the skin and eyes. It may also cause allergic sensitization.
   Skin
See inhalation.
   Eyes
See inhalation

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. 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.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop. 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. IMMEDIATELY call a hospital or poison control center even if no symptoms (such as redness or irritation) develop. IMMEDIATELY transport the victim to a hospital for treatment after washing the affected areas.
   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.