Heptamethyldisilanamine

  • Heptamethyldisilanylamine
  • N,N-Dimethylaminopentamethyldisilane
  • (Dimethylamino)pentamethyldisilane
Formula
C7H21NSi2
Structure
Description
Colorless to pale yellow liquid. Amine-like odor.

Registry Numbers and Inventories.
CAS
26798-98-1
Beilstein/Gmelin
2070117

Properties.
Formula
C7H21NSi2
Formula mass
175.42
Boiling point, °C
154
Density
0.7857 g/cm3 (20 C)
Solubility in water
Very soluble
Refractive index
1.4413 (20 C)
pKa/pKb
2.91 (pKb)

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. Corrosives area.
Handling
Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Use only in a chemical fume hood.
Protection
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.
Stability
Stable under normal shipping and handling conditions.
Incompatibilities
Water, oxidizing agents, acids, bases, alcohols, aluminum, chlorates, copper, zinc.
Decomposition
Nitrogen oxides, carbon monoxide, carbon dioxide, silicon oxide.

Fire.
Flash Point,°C
78
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Combustible Liquid. Extinguishing media: Use carbon dioxide or dry chemical.

Health.
Exposure effects
   Ingestion
Causes gastrointestinal irritation with nausea, vomiting and diarrhea. Causes gastrointestinal tract burns. Ingestion causes severe burns of the mouth and stomach.
   Inhalation
Causes chemical burns to the respiratory tract. May cause lung damage. Prolonged inhalation may cause skin eruptions.
   Skin
Causes skin burns.
   Eyes
Causes eye burns. May cause conjunctivitis. Contact with the eyes may cause corneal damage.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid immediately. Wash mouth out with water.
   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. 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.