Product Identification

Product Name

DAST

Synonyms

(Diethylamino)sulfur trifluoride
(Diethylamino)trifluorosulfur
(N,N-Diethylamino)sulfur trifluoride
DAST
Ethanamine, N-ethyl-, sulfur complex
Sulfur, (N-ethylethanaminato)trifluoro-, (T-4)-

CAS

38078-09-0

Formula

C4H10F3NS

Molecular Weight

161.19

EINECS

253-771-2

Beilstein/Gmelin

1849066

EC Class

corrosive

Physical and Chemical Properties

Appearance

Amber liquid.

Density

1.316 g/cm3

Usage

Fluorinating agent.

Refractive Index

1.4125 (20 C)

First Aid Measures

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.

Handling and Storage

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.

Hazards Identification

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.

Hazards

Contact with metals may evolve flammable hydrogen gas.

EC Risk Phrase

R 5 10 14 23 35

EC Safety Phrase

S 26 36/37/39 45 49

UN (DOT)

1760

Exposure Controls/Personal Protection

Personal 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.

Fire Fighting Measures

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.

Accidental Release Measures

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.

Stability and Reactivity

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.

Combustion Products

Fire may produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number

1760

Hazard Class

8

Packing Group

I; II; III

HS Code

2930 90 70