Diethylaminosulfate trifluoride

  • (N,N-Diethylamino)sulfur trifluoride
  • (Diethylamino)trifluorosulfur
  • (Diethylamino)sulfur trifluoride
  • Ethanamine, N-ethyl-, sulfur complex
  • Sulfur, (N-ethylethanaminato)trifluoro-, (T-4)-
  • DAST
Formula
(C2H5)2NSF3
Structure
Description
Amber liquid.
Uses
Fluorinating agent.

Registry Numbers and Inventories.
CAS
38078-09-0
EC (EINECS/ELINCS)
253-771-2
EC Class
corrosive
R 5 10 14 23 35
S 26 36/37/39 45 49
UN (DOT)
1760
Beilstein/Gmelin
1849066
Canada DSL/NDSL
DSL
New Zealand
Listed

Properties.
Formula
C4H10F3NS
Formula mass
161.19
Density
1.316 g/cm3
Refractive index
1.4125 (20 C)

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Refrigerator/flammables. Do not get water inside containers.
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Do not allow water to get into the container because of violent reaction. Ground and bond containers when transferring material. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
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 to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Remove all sources of ignition.
Disposal code
23
Stability
Stable under normal temperatures and pressures. Combines vigorously or explosively with water.
Incompatibilities
Strong oxidizing agents, strong acids, strong bases, alcohols.
Decomposition
Nitrogen oxides, carbon monoxide, carbon dioxide, hydrogen fluoride, nitrogen.

Fire.
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Reacts violently with water. Extinguishing media: Do NOT use water directly on fire. Use foam, dry chemical, or carbon dioxide.
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.
Exposure effects
   Ingestion
The toxicological properties of this substance have not been fully investigated.
   Inhalation
The toxicological properties of this substance have not been fully investigated.
   Skin
No information regarding skin irritation and other potential effects was found. May cause severe irritation and possible burns.
   Eyes
No information regarding eye irritation and other potential effects was found. May cause eye irritation and possible burns.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid immediately. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and 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.

Transport.
UN number
1760
Response guide
Hazard class
8
Packing Group
I; II; III
 
HS Code
2930 90 70