Thiomorpholine

  • Thiamorpholine
  • 1,4-Thiazane
  • Parathiazan
  • 1-Thia-4-azacyclohexane
  • Tetrahydro-1,4-thiazine
Formula
C4H9NS
Structure
Description
Clear, colorless liquid. With a stench.

Registry Numbers and Inventories.
CAS
123-90-0
EC (EINECS/ELINCS)
204-660-2
S 26 36/37/39 45
UN (DOT)
1760
Merck
12,9435
Beilstein/Gmelin
102550
Beilstein Reference
4-27-00-00636

Properties.
Formula
C4H9NS
Formula mass
103.18
Boiling point, °C
169
Vapor pressure, mmHg
1.5 (25 C)
Vapor density (air=1)
3.56
Density
1.0882 g/cm3 (20 C)
Solubility in water
Very soluble
Refractive index
1.5384 (20 C)
pKa/pKb
4.87 (pKb)
Partition coefficient, pKow
0.17
Heat of vaporization
40.6 kJ/mol

Hazards and Protection.
Storage
Keep container closed when not in use. Corrosives area. Do not expose to air. Store under nitrogen. Store in a cool, dry area away from incompatible substances.
Handling
Keep container tightly closed. Avoid contact with heat, sparks and flame. Do not get on skin or in eyes. Do not ingest or inhale. Use with adequate ventilation. Store protected from air. Use and store under nitrogen. Use only in a chemical fume hood. Discard contaminated shoes.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves and clothing to prevent skin exposure. Clothing: Wear appropriate protective clothing to minimize contact with skin.
Respirators
A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.
Small spills/leaks
Clean up spills immediately, using the appropriate protective equipment. Cover with an activated carbon adsorbent and place into a closed container for disposal. Provide ventilation. Place under an inert atmosphere.
Stability
Stable under normal temperatures and pressures. Air sensitive Volatile in steam.
Incompatibilities
Strong oxidizing agents, strong bases, air.
Decomposition
Nitrogen oxides, carbon monoxide, oxides of sulfur, carbon dioxide.

Fire.
Flash Point,°C
60
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
Contact with metals may evolve flammable hydrogen gas.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
1
 
 
Reactivity
0
 

Health.
Exposure effects
Effects may be delayed.
   Ingestion
May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns. May cause systemic effects. May cause nausea, headache, and vomiting.
   Inhalation
Causes chemical burns to the respiratory tract. Aspiration may lead to pulmonary edema. May cause systemic effects. May cause nausea, headache, and vomiting.
   Skin
Causes skin burns. May cause skin rash (in milder cases), and cold and clammy skin with cyanosis or pale color.
   Eyes
Causes eye burns. May cause chemical conjunctivitis and corneal damage.

First aid
 
   Ingestion
Never give anything by mouth to an unconscious person. Get medical aid immediately. Do NOT induce vomiting. If conscious and alert, rinse mouth and drink 2-4 cupfuls of milk or water.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. Do not use mouth-to-mouth respiration if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Destroy contaminated shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately. Do NOT allow victim to rub or keep eyes closed. Extensive irrigation is required (at least 30 minutes).

Transport.
UN number
1760
Response guide
Hazard class
8
Packing Group
I; II; III