Hexamethyleneimine

  • Perhydroazepine
  • Hexahydro-1H-azepine
  • Homopiperidine
  • Azacycloheptane
Formula
C6H13N
Structure
Description
Clear, colorless liquid with an ammonia-like odor.
Uses
Chemical intermediate for pharmaceutical, agricultural & rubber chemicals.

Registry Numbers and Inventories.
CAS
111-49-9
EC (EINECS/ELINCS)
203-875-9
EC Class
flammable, harmful, corrosive
R 10 20/21/22 34
S 23 26 36/37/39 45
RTECS
CM3150000
RTECS class
Other
UN (DOT)
2493
Beilstein/Gmelin
1084
Beilstein Reference
5-20-04-00003
Swiss Giftliste 1
G-8771
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C6H13N
Formula mass
99.18
Melting point, °C
-37
Boiling point, °C
138
Vapor pressure, mmHg
7.4 (20 C)
Vapor density (air=1)
3.4
Critical temperature
383
Critical pressure
43.5
Density
0.8841 g/cm3 (15 C)
Solubility in water
Very soluble
Refractive index
1.4625 (20 C)
Dipole moment
1.17 D (25 C)
pKa/pKb
2.93 (pKb)
Partition coefficient, pKow
1.02

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from heat and flame. Keep container closed when not in use. Flammables-area.
B2 D1A
Handling
Ground and bond containers when transferring material. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. 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. Discard contaminated shoes. 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 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
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Avoid runoff into storm sewers and ditches which lead to waterways. Clean up spills immediately, using the appropriate protective equipment. Scoop up with a nonsparking tool, then place into a suitable container for disposal. Remove all sources of ignition. Provide ventilation.
Disposal code
5
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong acids, strong oxidizing agents.
Decomposition
Nitrogen oxides, carbon monoxide, irritating and toxic fumes and gases, carbon dioxide, nitrogen.

Fire.
Flash Point,°C
18
Autoignition, °C
255
Upper exp. limit, %
9.9
Lower exp. limit, %
1.6
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. Use water spray to keep fire-exposed containers cool. Water may be ineffective. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. Water may be ineffective. Water may spread fire. If water is the only media available, use in flooding amounts.
Fire potential
Flammable liquid. May be ignited by heat, sparks or flames.
Hazards
Vapors may form an explosive mixture with air. Vapors can travel to a source of ignition and flash back. Vapors may be heavier than air. They can spread along the ground and collect in low or confined areas. Will be easily ignited by heat, sparks or flame. Containers may explode if exposed to fire. Liquid is lighter than water and a fire may be spread by the use of water.
Combustion products
Toxic oxides of nitrogen may form in fire.
Health
3
 
Flammability
3
 
 
Reactivity
0
 

Health.
Exposure limit(s)
OEL-RUSSIA:STEL 0.5 mg/m3;Skin
Poison_Class
2
Exposure effects
Repeated exposure may cause central nervous system damage.
   Ingestion
Harmful if swallowed. May cause severe and permanent damage to the digestive tract. Causes gastrointestinal tract burns.
   Inhalation
Causes chemical burns to the respiratory tract. Vapors may cause dizziness or suffocation. May cause central, peripheral, and autonomic nervous system effects.
   Skin
Causes skin burns.
   Eyes
Causes eye burns.

First aid
 
   Ingestion
Do NOT induce vomiting. 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
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. DO NOT use mouth-to-mouth respiration.
   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
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
2493
Response guide
Hazard class
3
Packing Group
II
 
USCG CHRIS Code
HMI
 
7 Aliphatic amines
HS Code
2933 99 30
 
Std. Transport #
4907872
 
IMO Chemical Code
17
IMO Pollution Category
C
IMO Hazard code
S/P